Geron Meigen

Hall, Jack C. & Evenhuis, Neal L., 2003, Review of the subgenus Geron (Geron) Meigen in the Nearctic Region (Diptera: Bombyliidae: Toxophorinae), Zootaxa 181, pp. 1-72 : 12-14

publication ID	https://doi.org/ 10.5281/zenodo.156842
DOI	https://doi.org/10.5281/zenodo.6273494
persistent identifier	https://treatment.plazi.org/id/FB38C637-FFDC-FFD9-FE9A-2420DF24F912
treatment provided by	Plazi
scientific name	Geron Meigen
status

Treatment

Key to species of the subgenus Geron Meigen View in CoL View at ENA from the Nearctic Region

1. Wing hyaline ................................................................................................................. 2

. Wing slightly infumate.................................................................................................. 3

2. Crossvein rm at middle of cell dm; scape with black hairs; basicostal pile pale yellow ....................................................................................................... subauratus Painter View in CoL

. Crossvein rm beyond middle of cell dm; scape with brown hairs; basicostal pile white ............................................................................................................ johnsoni Painter View in CoL

3. Crossvein mcu straight or nearly so ( Fig. 27 View FIGURES 27 – 28 ) ............................................................. 4

. Crossvein mcu sinuous ( Fig. 28 View FIGURES 27 – 28 ) ............................................................................... 6

4. Front of female with white to silver scales medially; crossvein rm at middle of cell dm; oral margin with come cinereous color................................................................. 5

. Front of female with golden scales medially, silver scales restricted to eye margins; crossvein rm beyond middle of cell dm; oral margin pure white .................................. ................................................................................. stenos Hall & Evenhuis View in CoL , sp. nov.

5. Scutellum completely devoid of scales; oral margin grayish white; vaginal furca ( Fig. 20 View FIGURES 19 – 24 ) with lateral struts angled outward .............. prosopidis Hall & Evenhuis View in CoL , sp. nov.

. Scutellum with a few white scales at anterolateral corners; oral margin gray; vaginal furca ( Fig. 8 View FIGURES 7 – 12 ) with lateral struts angled inward apically ................................................. ............................................................................... elachys Hall & Evenhuis View in CoL , sp. nov.

6. Front of female with silver to white scales medially ................................................... 7

. Front of female with golden scales medially ............................................................. 13

7. Mid tibia of male yellow to orange; crossvein rm at or beyond middle of cell dm..... 8

. Mid tibia of male black to brown; crossvein rm beyond middle of cell dm ............ 10

8. Crossvein rm beyond middle of cell dm ..................................................................... 9

. Crossvein rm at middle of cell dm...................... painteri Hall & Evenhuis View in CoL , sp. nov.

9. Front of female with yellow medial spot above oral margin; fore tarsi of female with unmodified setae ............................................. nevadensis Hall & Evenhuis View in CoL , sp. nov.

. Front of female without yellow medial spot above oral margin; fore tarsi of female with specialized palynophilic setae spatulate apically (cf. Fig. 29 View FIGURE 29. a ) (best seen under high magnification) ...................................................................... holosericeus Walker View in CoL

10. Male scutellum with scales, some specimens with a few restricted to anterolateral corners .......................................................................... albipilosus Hall & Evenhuis View in CoL , sp. nov.

. Male scutellum devoid of scales ................................................................................ 11

11. Upper occiput and dorsum or thorax and abdomen with golden scales admixed with silver to white scales ....................................................................... albidipennis Loew View in CoL

. Upper occiput and dorsum of thorax and abdomen with white scales........................ 12

12. Vaginal furca with broad lateral struts with ends turned up ( Fig. 5 View FIGURES 1 – 6 ) .............................. .............................................................................. borealis Hall & Evenhuis View in CoL , sp. nov.

. Vaginal furca with lateral struts narrow, ends not turned upward ( Fig. 4 View FIGURES 1 – 6 )...................... ............................................................................................................. argutus Painter View in CoL

13. Mid tibia of male brown to black ............................................................................... 14

. Mid tibia of male orange to yellowish ........................................................................ 20

14. Crossvein rm at middle of cell dm............................................................................. 15

. Crossvein rm beyond middle of cell dm .................................................................... 16

15. Pile of occiput all white; vaginal furca with lateral struts clublike apically ( Fig. 9 View FIGURES 7 – 12 ) .... ........................................................................... eriogonae Hall & Evenhuis View in CoL , sp. nov.

. Pile of occiput yellowish above, white below; vaginal furca with lateral struts broad apically, curved inward ( Fig. 12 View FIGURES 7 – 12 ) ..................... infrequens Hall & Evenhuis View in CoL , sp. nov.

16. Male scutellum with scales ................................................................... niveus Cresson View in CoL

. Male scutellum devoid of scales ................................................................................. 17

17. Fore tarsi of female with spatulate palynophilic setae ( Fig. 29 View FIGURE 29. a ); oral margin pale col ored, yellowish to cinereous....................................................................................... 18

. Fore tarsi of female without palynophilic setae; oral margin darker than above, orange yellow in color................................................... monticola Hall & Evenhuis View in CoL , sp. nov.

18. Basicostal hairs and scales yellow to golden ............................................................. 19

. Basicostal hairs and scales silvery white.............. cressoni Hall & Evenhuis View in CoL , sp. nov.

19. Mid leg of male black; male katepisternum dense white pilose and tomentose, pleura cinereous pollinose; female meron silvery pilose and tomentose; vaginal furca with apex of lateral struts containing long, thin inward process ( Fig. 19 View FIGURES 19 – 24 ) .............................. ................................................................................ peucon Hall & Evenhuis View in CoL , sp. nov.

. Mid leg of male brown; male katepisternum sparse white pilose, pleura generally dull gray, not pollinose; female meron bare; vaginal furca with apex of lateral struts containing broad, rounded inward process ( Fig. 10 View FIGURES 7 – 12 ) ................... halli Evenhuis View in CoL , sp. nov.

20. Antennal scape with black hairs................................................................................. 21

. Antennal scape with white hairs (a few black hairs may be present apically)........... 23

21. Crossvein rm at middle of cell dm; male scutellum with yellow scales........................ .......................................................................................................... senilis (Fabricius) View in CoL

. Crossvein rm beyond middle of cell dm; male scutellum devoid of scales.............. 22

22. Basicostal hairs and scales whitish; female fore tarsi with spatulate palynophilic setae ( Fig. 29 View FIGURE 29. a ) usually restricted to apical tarsal segments; vaginal furca with lateral struts very broad, not twisted ( Fig. 21 View FIGURES 19 – 24 ) ..................................................... rufipes Macquart View in CoL

. Basicostal hairs and scales golden; female fore tarsi without palynophilic setae; vaginal furca with lateral struts thin, twisted ( Fig. 25 View FIGURES 25 – 26 ) ............................ vitripennis Loew View in CoL

23. Basicostal hairs and scales yellow; male scutellum with scattered yellow tomentum 24

. Basicostal hairs and scales white; male scutellum with or without tomentum .......... 25

24. Crossvein rm at middle of cell dm; oral margin pale yellow; vaginal furca with apex of lateral struts complex, consisting of three connected plates ( Fig. 16 View FIGURES 13 – 18 ) ....................... .................................................................................. notios Hall & Evenhuis View in CoL , sp. nov.

. Crossvein rm beyond middle of cell dm; oral margin brownish; vaginal furca with apex of lateral struts with one inwardly and one outwardly directed lobe ( Fig. 26 View FIGURES 25 – 26 )....... ............................................................................... weemsi Hall & Evenhuis View in CoL , sp. nov.

25. Crossvein rm at middle of cell dm................................................... parvidus Painter View in CoL

. Crossvein rm beyond middle of cell dm ................................................................... 26

26. Oral margin cinereous to whitish ........................................................ nigripes Painter View in CoL

. Oral margin orangeish to yellow orange .................................................................... 27

27. Vaginal furca with pointed protuberances on inner margin ( Fig. 3 View FIGURES 1 – 6 ); distal ends of lateral struts not recurved inward ........................................................... arenicola Painter View in CoL

. Vaginal furca without such protuberances on inner margin; distal ends of lateral struts recurved inward ( Fig. 6 View FIGURES 1 – 6 )...................................... confusus Hall & Evenhuis View in CoL , sp. nov.