AKT. 20 REVISION" OF THE GENUS WINTHEMIA KEINHARD 35 



Male. — Front 0.283 of the head width in the one specimen, hardl)^ 

 widening to middle, thence gradually downward to base of antennae ; 

 parafrontals gray pollinose tinged with yellow, thickly clothed with 

 black hairs; median stripe reddish, broad to triangle extending on 

 either side to vertex; vertical bristles one pair (inner) developed; 

 orbitals none; ocellars present; frontals directed inward, the upper- 

 most very small and considerably before triangle, the rows strongly 

 divergent below antennae and extending opposite to base of third 

 joint; face gray pollinose, the sides narrow, faintly yellowish and 

 bearing rather coarse black hairs near middle; vibrissae slightly 

 above the mouth ; cheeks gray pollinose on red ground color, thickly 

 clothed with black hairs, in profile about one-seventh the eye height ; 

 palpi yellow ; antennae fully two-thirds as long as face, black, second 

 joint about three-fifths the length of third; arista rather short, red- 

 dish, slightly thickened near base, penultimate joint short; back of 

 head pale-haired. 



Thorax black, thinly cinereous pollinose; mesonotum with five 

 poorly defined black stripes behind and four in front of suture; 

 scutellum obscurely reddish, covered with uniform gray pollen; 

 calypters opaque, white, the margins with a tawny tinge. 



Abdomen black, the sides not very conspicuously red, but this color 

 extending without interruption from the hind margin of first seg- 

 ment to the apex of fourth; last three segments almost wholly cov- 

 ered with thin gray pollen devoid of any definite pattern and inter- 

 rupted by a narrow dark median stripe ; the hairs fine and depressed, 

 except on anal segment; basal segments without any median margi- 

 nal bristles ; third with a marginal row ; fourth bearing erect bristly 

 hairs near base with stronger bristles at the apex extending forward 

 on the sides; venter of the fourth segment thickly haired almost 

 with matted patches, but the margins poorly defined. 



Legs black, the tibiae obscurely yellow; claws and pulvilli not 

 exceeding the length of apical tarsal joint; mid tibiae bearing one 

 large and two smaller bristles near middle on outer front side ; hind 

 tibiae evenly ciliate. 



Wings hyaline, but with a yellow tinge at base and along costa; 

 jio costal spine ; venation as usual ; third vein with one hair at base. 



Length, 11 mm. 



Type.—MQht, U.S.N.M. No. 43579. 



Described irom the proposed type specimen reared from Platysamia 

 cecropia collected at Rockford, 111., September, 1866. Another male 

 probably belonging to the same species is in the Illinois State 

 Natural History Survey collection, taken October 8, 1908, " from 

 cecropia''^ (Sanders); it differs in having the front narrower at 

 vertex and gradually diverging all the way to base of antennae. 



