Toxophora leucon Séguy, 1930

Cunha, André Mallemont, Lamas, Carlos José Einicker & Couri, Márcia Souto, 2009, Redescription of two Neotropical species of TOXOPHORA Meigen (Diptera, Bombyliidae, Toxophorinae), Papéis Avulsos de Zoologia 49 (18), pp. 221-227 : 224-226

Toxophora leucon Séguy, 1930

( Figs. 9-16 )

Toxophora leucon Séguy, 1930:533 ; Painter & Painter, 1974:88; Painter et al. 1978:21; Evenhuis & Greathead, 1999:72.

Eniconeura leucon : d’Andretta & Carrera, 1950:370, missp.

Toxophora (Eniconeura) leucon : Hull, 1973:236.

Male: Head: As wide as thorax; holoptic; frons gray pollinose; base of antennae with brown scales and brownish-yellow scales on laterals; scape twice the length of the two other segments, densely covered by dark brown and brown scales; pedicel with short dark brown scales on lateral and ventral surfaces, with nearly the same length of flagellum ( Fig. 9 ); flagellum with short dark brown setae; face gray pollinose; proboscis dark-brown, long, with nearly twice the length of head; palpus unisegmented, brown with short brown setae and half of proboscis length; occiput gray pollinose, with brownish-yellow hairs and brown scales; ocellar tubercle with two strong dark brown setae directed forward.

Thorax: pronotum well developed with five pairs of strong dark brown setae, one median pair directed backwards, one paramedian pair directed to the center, and three lateral pairs ( Fig. 9 ); mesonotum dark brown with brownish-yellow hairs and strong dark brown setae on lateral margin, brownish-yellow scales forming a longitudinal stripe on center; pleurae gray pollinose and with white scales on katepisternum and metepisternum; anepisternum with yellow scales, yellow pile, dark brown setae on the postero-superior margin and a row of yellow setae on superior margin; rest of pleurae bare; halter brownish-yellow; scutellum with brownish-yellow scales forming a longitudinal stripe on center, white scales and dark brown bristles on posterior margin.

Wings: costa with dark brown scales; hyaline surface with brown infuscation on anterior half and circular spots on R4 vein, base and apex of discal cell, r-m crossvein and apex of R2+3; inter-radial crossvein, merging R4 with R2+3; r-m crossvein on middle third of discal cell; three submarginal cells; calypter with long whitish-yellow hairs.

Legs: coxa I and II with white scales, coxa III with white scales and three long brownish-yellow setae on dorsal surface; trochanter II with four dark brown setae; femur I and II with dark brown scales and brownish-yellow scales on anterior surface and white on posterior, femur II with a row of setae on the basal 2/3 of the ventral surface, femur III with white scales on anterior surface and dark brown on posterior, with three dark brown setae, two on the anteroventral surface and one on the posteroventral; tibia I and II with brownish-yellow scale on posterior and dorsal surfaces; tibia I with two parallel rows of setae on dorsal surface and one setae on the base of the posterior surface, tibia II with a row of setae on dorsal surface alternating with long and short setae, tibia III with long dark brown and brown scales and dark brown setae on all surfaces; tarsi dark brown, with brown pile and dark brown setae on ventral surface; pulvilli light brown with nearly the same length as claws.

Abdomen: covered with dark brown scales, except for brownish-yellow scales forming a longitudinal stripe on center of all tergites and white scales laterally ( Fig. 10 ); sternites I-IV with white scales; sternites V-VII with dark brown scales, brownish-yellow on apex and white laterally.

Genitalia: epandrium with posterior margin concave ( Fig. 11 ), with a small projection on center, fused to posterodorsal region of the gonocoxite; cercus with a group of short dark brown setae forming a spot on the lateral; hypandrium absent; gonocoxites fused, without median internal ridge; distiphallus shorter than epiphallus, wide and with broad apex pointing upwards; epiphallus with long base and apex wide with two long projections on lateroventral faces ( Figs. 12 and 13 ); gonostylus short with thin and pointed apex; lateral aedeagal apodema and ejaculatory apodema long, both surpassing gonocoxal limits.

Female: similar to male, except for the following: dichoptic; trochanter without setae; lack of setae on femur III; tibia I and II with a row of setae on posterior surface.

Spermathecae: furca U-shaped with an anterior spine ( Fig. 15 ). Spermathecal duct two and a half times longer than sperm pump; sperm pump with well developed sclerotized collars with indented margins. Spermathecal bulbs sclerotized, tubular and strongly coiled ( Fig. 14 ).

Egg: oval form, 1.5 to 2.0 times longer than wide, with an operculum ( Fig. 16 ).

Examined material: BRAZIL, Mato Grosso: Corumbá , 16-XI-1994, 1 male (7289), 1 female (7290), LF Gomes col., CJE Lamas det., ( MNRJ) ; Corumbá, Serra do Urucum , 3-XII-1960, 2 females, 4-XII-1960, 1 female, K. Lenko col ( MZUSP) ; Pará: Santarém , 9-IV-1956, 1 male (788), Elias e Roppa col. ( MNRJ) ; São Paulo: Araçatuba, Córrego Azul , II-1946, 3 males e 4 females, Barreto col.( MZUSP) .

Distribuition: Argentina; Brazil: Mato Grosso, Pará, São Paulo; Bolivia; Paraguay.

Figures

FIGURES 9‑16: Toxophora leucon Séguy, 1930: (9) General habitus, lateral view; (10) Abdomen, dorsal view; (11) Epandrium, dorsal view; (12) Male terminalia, ventral view; (13) Male terminalia, lateral view; (14) Spermathecae; (15) Furca; (16) Egg.