ART. 20 REVISION OF THE GENUS WINTHEMIA ^REINHARD 37 



Abdomen black in ground color, the sides broadly reddish; last 

 three segments gray pollinose, in a flat view the pollen extends to 

 the hind margins of the intermediate segments; the pollen on base 

 of fourth with reflecting spots which change from light to dark in 

 opposite angles; first segment without median marginal bristles; 

 second without any in one specimen and an unequally developed pair 

 in the other; third bearing a marginal row; fourth segment covered 

 with long bristly hairs becoming stronger toward the apex; hairs 

 on intermediate segments depressed; genital segments yellow, small, 

 and retracted; inner forceps blackish, longer than usual, narrow at 

 base and tapering gradually to an acute undivided tip ; outer forceps 

 yellow, about as long as inner ones, also rather slender but not 

 much tapering, the tips slightly bowed forward, with black bristly 

 hairs on outer side; venter with large roundish sharply defined 

 patches of glossy-black hairs on the third segment, none on fourth. 



Legs black; hind tibiae thickly and evenly ciliate; mid tibiae 

 with one stout anterior bristle near middle; claws and pulvilli 

 elongate. 



Wings subhyaline, brownish at base with a fainter tinge on an- 

 terior border; no costal spine; venation as usual; third vein with 

 one hair at base. 



Length, 12 mm. 



Female. — Unknown . 



Type.—M'Ale, U.S.N.M. No. 43345. 



Described from two specimens from Indian Creek Canyon, Chiri- 

 cahua Mountains (6,100 feet), Ariz. (C. H. T. Townsend). 



(21) WINTHEMIA MIMA, new species 



Plate 1, Figtjee 2 



Male. — Front 0.21 to 0.24 of the head width (four measured), 

 hardly widening to middle thence rapidly downward to antennae; 

 median stripe brownish black, at triangle wider than one para- 

 frontal ; front yellow pollinose, clothed with fine short hairs ; ocellar 

 bristles absent; verticals two pairs; orbitals none; frontal rows di- 

 verging below and extending about to the level of arista; sides of 

 face with black hairs, which extend downward almost to the cheeks ; 

 antennae black, reaching lower fourth of face, third joint twice the 

 length of second and slightly wider than parafacial at narrowest; 

 arista black, slender, with a short penultimate joint; palpi black on 

 proximal half yellow apically, beset with black hairs; cheeks gray 

 pollinose, clothed with black hairs, in profile about one-eighth the 

 eye height. 



Thorax black, with the gray pollen thinner on mesonotum; the 

 latter marked with four broad black uninterrupted stripes separated 



