10 PROCEEDINGS OF THE NATIONAL MUSEUM vol.79 



(1) WINTHEMIA ANTENNALIS Coquillett 



Winthemia antennalis CoQunxErrr, Proc. U. S. Nat. Mus., vol. 25, p. 115, 1902.— 



ToTHiLL, Can. Ent., vol. 44, pp. 1-2, 1912. 

 Winthemia nigrifacies Bigot, Coquillett, Revis. Tachin., p. 125, 1897 (not Bigot). 



Scutellum bearing only two lateral bristles; face and front plum- 

 beous; abdominal hairs erect; ocellars weak or absent. 



Male. — Front (before vertex) 0.286 of the head width in the one 

 specimen; parafrontals subshining black faintly pruinose below, 

 thickly clothed with long black hairs ; median stripe brownish black, 

 at antennae wider than one paraf rontal but greatly narrowed toward 

 triangle; inner verticals of moderate length, outer ones vestigial; 

 no ocellars or orbitals; uppermost two frontals reclinate, stronger 

 than the preceding ones but not very long, the lower bristles hardly 

 on level with aj)ex of second antennal joint; paraf acial not much 

 narrowed downward, thickly clothed with black hairs, which extend 

 close to the eye border; facial ridges bare except a few hairs next 

 to vibrissae, which are situated on oral margin; antennae black, 

 third joint three times the length of second ; arista also black, thick- 

 ened on basal fourth, penultimate joint only slightly longer than 

 wide; cheek in profile about one-seventh the eye height, destitute of 

 pollen, black and clothed with short fine hairs; palpi slender, black at 

 base brownish yellow on tips, beset with numerous black hairs ; eyes 

 densely pale-haired. 



Thorax black, subshining, lightly dusted Vv^ith pale-gray pollen; 

 mesonotum with five narrow black stripes before suture and becom- 

 ing indistinct behind; scutellum obscurely reddish at apex, in some 

 angles apparently shining but pruinose in a flat rear view; calypters 

 white, the rims tinged with yellow. 



Abdomen black with a red color apparent on sides; segments 2 

 to 4 sprinkled with thin bluish-gray pollen, which extends nearly 

 to the hind margins on segments 2 and 3 ; a median dark stripe and 

 changeable blackish spots visible in most views on the intermediate 

 segments; first segment without median marginals; second with a 

 weak pair scarcely larger than the surrounding hairs; third bear- 

 ing a marginal row of about 10 bristles; fourth with irregular placed 

 discals and a marginal row of weaker bristles; venter without any 

 defined patches of dense hairs on either third or fourth segments; 

 inner genital forceps united and keeled behind, rather broad at base 

 tapering to apex, which is shallowly notched; outer forceps nearly 

 as long as inner ones, emarginate shortly before apex on the hind 

 side, yellow. 



Legs black; hind tibiae ciliate with one slightly longer bristle in 

 the row ; mid tibiae with one stout anterior bristle near the middle ; 

 claws and pulvilli elongate. 



