Heterostylum maculipennis, Cunha & Lamas, 2005

Cunha, André Mallemont & Lamas, Carlos José Einicker, 2005, Two new species of Heterostylum Macquart (Diptera, Bombyliidae, Bombyliinae) from Brazil, Zootaxa 1006 (1), pp. 23-32 : 28-31

Heterostylum maculipennis n. sp.

( Figs. 6–10 )

Holotype male ( Figs. 6–7 ): Brazil, São Paulo: Praia Grande , Fazenda Rondonea. II­1945, M. Carrera, (26.483); deposited in MZSP.

Condition: good. Left wing with damaged apex; right wing with apex of costal cell and posterior margin damaged; right leg III missing (glued to label); abdomen without terminal segments (dissected and pinned together in a microvial with glycerin).

Diagnosis: H. maculipennis n. sp. can be readily distinguished from other Brazilian species within the genus as it is the unique species to present wings tinted brown, not only on its base, but also on areas around veins and cells. All other Brazilian species have hyaline wings with colored base.

Body length: 10.5mm; wing length: 27.1mm.

Head: holoptic, front dark brown and light brown pollinose, with brown hairs; ocellar tubercle dark brown and gray pollinose, with sparse dark brown bristles. Anterior ocellus separated from the lateral ones by a transverse row of dark brown bristles; face brown and light brown pollinose, smoothly projecting, with brown hairs; oral margin with brown pile dorsally and yellowish white laterally, also genae; antennae dark brown and gray pollinose, scape with long brown bristles on outer surface, as long as pedicel; pedicel with short brown bristles on outer surface; flagellum dark brown, similar in length to scape and pedicel together, with one flagellomere and an apical style; proboscis dark brown projecting beyond the oral margin by 5/6 of its length; palpus brown, 1/9 of the length of the proboscis, with brown hairs; occiput yellow with brown hairs on the upper half and yellowish white on the inferior one.

Thorax: mesonotum dark brown, with golden pile dorsally and light brown and yellow laterally ( Fig. 6 ); scutellum reddish brown with brown pile and dark brown bristles on posterior margin; supra­alar callus with sparse strong dark brown bristles and postalar callus with a row of strong dark brown bristles; pleura brown; anepisternum with brown hairs on upper half and yellow ones on lower half; katepisternum with yellow hairs; anepimeron, meron, and laterotergite bare; metepisternum brown with sparse brown hairs; squama with tuft of yellow hairs; halter with stem brown and knob dark brown.

Legs: yellowish brown with darker tarsomeres; all coxae with brown hairs; all femora with light brown hairs and dark brown scales on anterior surface; apices dark brown; femur III with a row of dark brown bristles in the distal 2/3 of anteroventral surface and small dark brown bristles at the apex of dorsal surface; all tibiae with apical dark brown bristles; tibia I with small dark brown bristles and row of dark brown bristles in dorsal surface; tibiae II and III with dark brown bristles; tibia III with dark brown scales; tarsus with dark brown bristles and scales; the last three tarsomeres darker than others; pulvilli light brown, 2/3 as long as claws

Wings: tinted brown at base and areas around veins and cells: costal, bm, br, anal, axillary and alula ( Fig. 6 ); r­m crossvein beyond middle of discal cell, anal cell open on wing margin by the length of the r­m crossvein.

Abdomen: tergites dark brown; tergite I with yellow hairs; tergites II and III with dark brown hairs and two light brown lateral spots, with yellow hairs; tergite IV with dark brown hairs and two light brown spots with yellow hairs ( Fig. 6 ); yellow hairs laterally ( Fig. 7 ); tergites V and VI with dark brown hairs; tergite VII with dark brown hairs dorsally and yellowish­white laterally; sternites dark brown, with brown hairs.

Genitalia: in lateral view with gonocoxa elongate and rounded at apex ( Fig. 9 ); epiphallus long, L­shaped apically ( Fig. 9 ), not surpassing apex of posterior process of gonocoxa; aedeagus tapering sinuously to thin and somewhat rounded apex; gonostylus robust, with apical beak­like process ( Fig. 8 ); in dorsal view, lateral aedeagal apodeme short, not surpassing gonocoxal margins; ejaculatory apodeme surpassing gonocoxal limits ( Fig. 8 ).

Female: Similar to the male, except for:

Body length: 9.3–10.3mm; wing length: 27.8–30.9mm.

Dichoptic eyes.

Spermathecae ( Fig. 10 ): furca U­shaped, with lateral processes enlarged apically, with pointed apex; spermathecae globose, 1/3 longer than wide, with longitudinal axis as long as sperm pump; spermathecal ducts 3 x length of sperm pump, uniting to form a short common spermathecal duct; sperm pump placed in the middle 1/3 of the spermathecal duct; sclerotized collars reduced.

Examined Material: Paratypes. Brazil, Rio de Janeiro: Nova Friburgo, Mury , 31­I­ 1965, 2 females, Gred & Guimarães ( MZSP) ; Itatiaia (700 m), 28­XII­1947, 1 female (26.484), J. F. Zikan ( MZSP) ; Angra dos Reis, Japuhyba , I­1935, 1 female (638), Dario Mendes ( MNRJ) ; Santa Catarina: Nova Teutonia (27°11'W. 52°23'S.), 1939, 2 females, Fritz Plaumann ( BMNH) .

Distribution: Brazil: Rio de Janeiro (Nova Friburgo, Itatiaia, Angra dos Reis), São Paulo (Praia Grande), Santa Catarina (Nova Teutônia).

Figures

FIGURES 6–7. Holotype of Heterostylum maculipennis n. sp. (6) General habitus, dorsal view; (7) General habitus, lateral view.

FIGURES 8–10. Heterostylum maculipennis n. sp. (8) Male terminalia, dorsal view; (9) male terminalia, lateral view; (10) spermathecae.