Heteromeringia fumipennis MELANDER & ARGO , 1924

Lonsdale, Owen & Marshall, Stephen A., 2007, Revision of the New World Heteromeringia (Diptera: Clusiidae: Clusiodinae), Beiträge Zur Entomologie = Contributions to Entomology 57 (1), pp. 37-80 : 45-46

Heteromeringia fumipennis MELANDER & ARGO, 1924

(Figs 9, 13-15, 28, 57, Map 2 )

Heteromeringia fumipennisfumipennis MELANDER & ARGO, 1924: 30 .

Description (Fig. 9)

Male

Body length 2.8-4.1 mm. Bristles black. Anterior dorsocentral bristle 1/2-4/5 length of posterior dorsocentral. Ocellar bristle relatively long and well-developed. All genal bristles small and hair-like. Three fronto-orbital bristles. Arista short-plumose. Male with small white disc anterior and ventral to anepisternal bristle. Thorax dark brown. Fore coxa white, and mid and hind coxae yellow (occasionally brown). Legs yellow except as follows: fore femur dark brown apically; mid femur sometimes dark brown on basal 4/5; hind femur dark brown apically (sometimes to distal half); fore tarsi, and fore and hind tibiae dark brown. Frons black with anterior margin orange; occiput and back of head dark brown; face and gena yellow to orange; palpus black with yellow tip (distal half or more sometimes yellow); one male and several females with palpus entirely black (this does not appear to correlate with any other variably coloured structures); antenna yellow with inner-distal margin dark brown; parafacial orange to brown or black; anterior 1/3 of frons pilose centrally; upper half of gena silvery tomentose anteriorly or along entire length. Wing darkly clouded excluding margin of anal lobe and (sometimes) basal 1/5; pattern occasionally as described for H. nitida . M

1+2

ratio 4.0-4.5.

Holotype male with wing not as darkly infuscated, mid femur yellow, and palpus dark brown on basal 1/3.

Male terminalia ( Figs 13-15 )

Epandrial length 7/10 height and width and height subequal. Surstylus acutely triangular with posterior margin sinuate and height 7/10 that of epandrium; several small rounded bristles on inner face distally. Cerci thin, entirely united, and as high as surstylus. Hypandrium + pregonite globular with two stout bristles and several setulae; suture present on distal 1/5. Phallapodeme well-developed, swollen distally, and 1/5 longer than hypandrium + pregonite. Distiphallus with subapical break in one rib.

Female

As described for male except as follows: fore femur brown on distal 1/3-2/3 (one CNCI female from Nova Teutonia with base yellow); hind tibia occasionally yellow (two CNCI females from Nova Teutonia); frons entirely black; one Peruvian CNCI female with palpus only barely infuscated at base; face dark brown to black but always yellow beneath antennal base; gena dirty yellow to black; upper 1/3 of gena silvery tomentose anteriorly; segment 10 and cercus yellow.

One Mexican female (CNCI) with frons shiny, hind tibia with dorsal surface light brown, hind tibia and femur with one pair of dorsal and ventroapical spots, wing clouded along costa (distal to R 1) and around R 2+32+3, palpus black, and occiput and ventral half gena dark brown.

Female terminalia ( Fig. 28 )

Spermatheca 1/5 longer than wide (slightly narrower distally), strongly telescoped, densely covered with narrow transverse furrows, cross-section circular with four weak corners, and distally truncate with sunken apical cone. Spermathecal duct thin, weakly sclerotized, and twice length of spermatheca. Ventral receptacle small, recurved and with relatively short subterminal flagellum.

Distribution

Argentina, Bolivia, Belize, Brazil, Costa Rica, Dominican Republic, Ecuador, Guatemala, Guyana, Honduras, Jamaica, Mexico, Panama, Peru, Trinidad, Venezuela ( Map 2 ).

Holotype: COSTA RICA. La Suiza de Turrialba , P. Schild (1 , USNM).

Paratypes examined: COSTA RICA. Juan Vinas, 6.v.1910, near brook, forest edge, 2500', P.P. Calvert (1 , USNM) , Higuito, San Mateo, P. Schild (1 , USNM) , Turrialba, P. Schild (1 , USNM) , xi.1922 (2 , USNM) , La Suiza, 1922, P. Schild (2  , USNM) .

Paratype ( Craspedochaeta concinna ): COSTA RICA. Turrialba (1 , USNM) .

Additional material examined: 156   108  [ BMNH, CASC, CBFC, CNCI, DEBU, EMUS, INBC, INPA, NHRS, QCAZ, USNM, ZSMC].

Comments

Heteromeringia fumipennis is a relatively common neotropical clusiid with hair-like genal bristles, darkly clouded wings and yellow fore femora with a dark brown apex (darker in females). The male genitalia are characterized by long, thin united cerci.

Figures

Map 2: Distribution of Heteromeringia fumipennis MELANDERELANDER & ARGO.

Figs 13-15: Heteromeringia fumipennis MELANDER Figs 19-21: Heteromeringia nigripes MELANDERELANDER & & ARGO, genitalia. 13 external, left lateral; 14 exter- ARGO, genitalia. 19 external, left lateral; 20 external, posterior; 15 internal, left lateral. Ejaculatory nal, posterior; 21 internal, left lateral. Ejaculatory apodeme omitted. apodeme omitted.

Figs 28-30: Female internal genitalia (spermathecae and ventral receptacle). 28 Heteromeringia fumipennis MELANDER & ARGO; 29 H. nitida JOHNSON; 30 H. nigripesnigripes MELANDERELANDER & ARGO.