Anthrax angustipennis Macquart 1840

Anthrax angustipennis Macquart

Anthrax angustipennis Macquart, 1840, p. 64.

Argyramoeba angustipennis.—Kertész, 1909, p. 60.

Anthrax binotatus Macquart, 1846, p. 113.

MALE.—Body black, femora and tibiae dark red; integument brown and gray pruinose. Front with black setae and a few black scales; setae on face black or mixed yellow and black. Occiput with black setae and a few black scales; fringe of hairs on posterior margin black exteriorly and white interiorly above, mostly white below. First antennal segment about as long as apical width; second segment globular; base of third segment flattened laterally, tapering abruptly to styliform part, about as broad as second segment in lateral view; styliform part slightly longer than base, about twice as long as style (Figure 107).

Discs of mesonotum and scutellum with linear black scales, gold scales sometimes present laterally. Sternopleuron, lower half of mesopleuron, and anterior part of pteropleuron with fine black setae and linear yellow, black, or white scales. Pile on prosternum, propleuron, dorsal half of mesopleuron, and anterior margin of mesonotum white, some black hairs and setae on last two, or with predominantly black pile on last three. Postalar tuft of pile white. Fore coxa with black or white bristles and yellow, white, or black scales; middle and hind coxae with black bristles and black and/or yellow, or white scales. Hypopleuron and metapleuron bare.

Wing (Plate 5d) pigmented anteriorly and basally, hyaline posteriorly; pigment filling cells C, Sc, and R1, filling cell R2+3 to base of cell R4 and along apical margin to apex; margin of pigment extending posteriorly from base of cell R4 to base of cell R5; and thence to posterior margin at basal third of cell 2A. Base of cell R4 angled, with short spur; r–m crossvein at basal two-fifths of cell 1M2, base of vein R2+3 slightly basad; contact of cells 1M2 and Cu1 about 2.5 times longer than width of base of cell Cu1; cell 1A punctiform apically; cell 2A somewhat narrowed, narrower than cell 1A postmedially; alula reduced, posterior margin straight. Stigmatic area heavily pigmented; calypter pigmented, fringe of hairs black. Stem of halter brown, knob brown basally, yellow apically.

Fore and middle femora with black scales anteriorly and a few white scales posteriorly; hind femur with black scales; fore and middle tibiae with black scales anteriorly and white scales posteriorly; hind tibia with black scales. Middle femur with three or four weak macrochaetae anteroventrally; fore tibia with complete row of macrochaetae anterodorsally, hind tibia with single row of macrochaetae anterodorsally.

Lateral margins of first abdominal tergum with yellow or white pile ventrally and black and brown pile dorsally; lateral margins of terga two through five with black setae, hairs, and scales. Posterior margin of first tergum with linear black scales; discs of terga two through four and sometimes center of five with linear black scales. Remainder of terga with dense, overlapping, posteriorly produced, lanceolate-truncate, white scales. Venter with yellow or black setae and white or black scales.

MALE GENITALIA (Figure 69).—Gonocoxites long and narrow, slightly folded inward along mesal line apically; apices obtusely angled in ventral view; upper margins lined with setae, ventral parts with setae four-fifths of way to base. Basal segment of gonostylus normally developed, evenly rounded dorsally in lateral view, with a few fine setae mesally in ventral view; distal segment of gonostylus ovoid, with blunt tooth apically, with fine setae ventrally toward base. Dorsal part of apex of epiphallus bluntly rounded apically in dorsal view, evenly rounded laterally, with sharp projection basally; ventrolateral part evenly rounded outward, downward and inward from dorsal part and apex of basal bands, rounded basad apically. Dorsal bands with numerous setae both before and after their junction. Basal part of aedeagus long and slender, almost tubular, tapering slightly to junction with ventral bands beyond junction of dorsal bands.

FEMALE.—Wing (Plate 5e) less extensively pigmented; pigmented area extending out to a line extending from tip of vein R1 across cells R1 and R2+3 to a point on vein R4+5 one-half to four-fifths of way to its bifurcation, diagonally across cell R5 to a point on vein M1+2 one-fifth to one-half of way to its bifurcation, and then basally in a straight line to tip of vein 1A, or curving across apex of cell 1A to hind margin midway in cell 2A. Contact of cells 1M2 and Cu1 only slightly longer than width of base of cell Cu1.

FEMALE GENITALIA (Figure 85).—Tenth tergum with about 21 spines on each side. Ventral arm of ninth tergum relatively broad, apex bilobed and turned inward distally. Dorsomedial corner of sclerite on each side of gonopore with very small dorsal angle; lateral arm very short, apically rounded; ventral arm long, broadened parallel to meson and tapering to sharp, mesally curved apex. Each duct of spermathecae about 3 times as long as bulb; first section very short, middle section about 1.5 times longer than third section which is slightly longer than bulb, expanded distally and with small expansions postbasally; bulb long and slender, symmetrical, about 3 times longer than wide and distinctly darker than duct

DISTRIBUTION.—The few specimens available of this species indicate that it occurs in the tropical rain forest of northern South America and in the Serra do Mar in eastern Brazil (Map 19).

TYPES.—The type male of Anthrax angustipennis is in the Paris Museum. According to notes supplied by R. H. and E. M. Painter, it carries the labels “No. 905 Anthrax angustipennis” and “Sources de l’oyapok 2896, 9?.” It is badly rubbed, and the third antennal segments are missing. Specimens from the Amazon region of Brazil agree well with the redescription of the type given by Painter and Painter. The type-locality given in Macquart’s description is “De la Guyane, aux sources de l’Oyapock.” The river Oiapoque separates French Guiana from the Territorio do Amapá, Brazil.

MAP 19.—Distribution of Anthrax angustipennis.

According to notes supplied by R. H. and E. M. Painter, the two female types of Anthrax binotatus Macquart are in the Bigot collection of the British Museum under the label “Anthrax binotatus, n. sp.” in Macquart’s handwriting, pasted on a larger label with “Nova Grenada Nomm. par Macq.” One of the specimens is headless but otherwise in good condition; the other has the third segments of the antennae missing, part of the head eaten, and a dense covering of fungus. Specimens from northern South America agree well with a redescription prepared by Painter. The type-locality is probably the island of Grenada in the British West Indies.