Allograpta ( Costarica ) nishida Mengual & Thompson

Mengual, Ximo, Ruiz, Carlos, Rojo, Santos, Ståhls, Gunilla & Thompson, Christian, 2009, A conspectus of the flower fly genus Allograpta (Diptera: Syrphidae) with description of a new subgenus and species, Zootaxa 2214, pp. 1-28 : 18

Allograpta ( Costarica) nishida Mengual & Thompson , sp. nov.

Figures 20 and 21 .

Male. Head: Face black medially, narrowly yellow laterally, short yellow pilose laterally; gena yellow, yellow pilose; lunule black; frontal triangle black except very narrowly yellow laterally, black pollinose and pilose; eye contiguity long, as long as vertical triangle; vertical triangle black, black pollinose and pilose; occiput yellow on ventral 1/3 and black on dorsal 2/3, white pollinose and yellow pilose on ventral 2/3, black pollinose and pilose on dorsal 1/3. Antenna brownish black except pale yellowish orange basoventral 1/3 of basoflagellomere, black pilose; arista black.

Thorax: Black except yellow posterior notopleuron, narrowly along base of scutellum, posterior 1/3 of anepisternum; yellow pilose except black pilose on dorsolaterally to wing base; calypter black; halter black except yellow capitulum. Legs: brownish black except yellow femoral apices and basal 1/3 of tibiae, black pilose except a few yellow pili on bases of femora. Wing: hyaline except costal and subcostal darker brownish, microtrichose.

Abdomen: Elongate, slightly narrower than thorax, shiny brownish black except for basal arcuate yellow fasciae on 3rd–4th terga and yellow lateral 1/3 of 1st tergum, black pilose except long lateral white pile and with dense thick brownish-black pile at dorsomedial part on 1st and 2nd terga (fig. 20a); sterna dark; 1st sternum long white pilose; 2nd sternum short white pilose; 3rd–5th sterna appressed black pilose. Male genitalia as figured (fig. 21).

Female. Similar to male except for normal sexual dimorphism and: frons black except yellow laterally on ventral 2/3, dull, yellow pilose; 2nd tergum with arcuate yellow fascia narrowly divided medially. Abdomen mainly shiny, dull black pollinose on most of 2nd terga except apical margin and yellow fasciae, black pollinose areas on 3rd thru 5th terga restricted to medial area posterior to yellow fasciae (see fig. 20b).

Types. Holotype: Male from Costa Rica, Limon: Parque Internacional La Amistad, sendero Circular, 2406 m, LS 340258 577465, 20 June - 5 July 2003, D. Rubi, net collected, #74159 (1 3 INB0003724240 INBIO), deposited in Instituto Nacional de Biodiversidad, Santo Domingo. Paratypes: COSTA RICA. Cartago: Genesis II, 2360 m, LN 188600 545900, 9 June 1994, M. M. Chavarria, #3157 (1 Ƥ INBIOCRI002014790 USNM); Puntarenas, Parque Internacional La Amistad, Cerro Hoffman, Sendero hacia, 2160 m, LS 337931 575490, 30 June–5 July 2003, D. Rubi, net collected, #74163, (1 Ƥ INB0003724104, USNM)

Length. Male (1): body, 11.3 mm; wing, 10.0 mm. Female (2): body, 11.5–13.0 (12.3) mm; wing, 10.1– 11.8 (10.9) mm.

Etymology. This species is named after Kenji Nishida in recognition of his discoveries on the diverse life histories of Allograpta species in Costa Rica. The name is to be treated as a noun in apposition.

Allograpta nishida is readily distinguished from zumbadoi as outlined in the key.

Figures

FIGURE 20. Abdomen of Allograpta (Costarica) nishida sp. nov., dorsal view: a, male; b, female.

FIGURE 21. Male genitalia of Allograpta (Costarica) nishida sp. nov.: a, dorsal view; b, lateral view.