ART. 20 REVISION" OF THE GENUS WINTHEMIA EEINHARD 25 



(12) WINTHEMIA SINUATA, new sp«cies 



Sides of front yellow to golden pollinose, parafacials concolorous 

 above often paler or wholly whitish, bearing only a few short hairs ; 

 mesonotum marked with five complete stripes; inner orbits sinuate 

 in male. 



Male. — Front moderately broad at vertex, slightly narrowed before 

 triangle, thence widening rapidly to base of antennae, at narrowest 

 part 0.242 of the head width (average of five: 0.24; 0.24; 0.23; 0.26; 

 0.24) ; median stripe reddish brown, occupying about one-third of 

 the frontal width at triangle ; verticals two pairs, rather small ; ocellar 

 bristles present; orbitals none; frontal bristles about 12 in number 

 directed inward and extending to apex of second antennal joint, the 

 uppermost hairlike and situated before apex of triangle; antennae 

 three-fourths the length of face, black, the apex of second and base 

 of third joint red, the latter less than twice as long as second 

 joint; arista reddish, slightly thickened on basal two-fifths, penulti- 

 mate joint short; vibrissae somewhat approximated, on level with 

 oral margin; palpi yellow, beset with numerous black hairs; cheeks 

 gray pollinose, clothed with fine short black hairs, about one-eighth 

 the eye height. 



Thorax black, gray pollinose; mesonotum with thinner pollen 

 and marked with five shining black vittae; scutellum red beyond nar- 

 row base and covered with thin bluish-white pollen; postscutellum 

 thinly pollinose; calypters opaque, white, the margins tinged with 

 yellow. 



Abdomen broadly red beginning with the first segment and extend- 

 ing continuously to apex of fourth, only a broad stripe in the middle 

 black in ground color; intermediate segments gray pollinose nearly 

 to hind margins ; the pollen on fourth segment confined to basal half 

 and interrupted by roundish spots which change from light to dark 

 as the angle varies ; first segment usually w^ithout median marginals ; 

 second with or without one pair; third bearing a marginal row of 

 10 to 12; fourth with several irregular rows near apex and erect 

 bristly hairs in front; venter of third and fourth segments without 

 any defined patches of matted hairs ; inner genital forceps blackish, 

 sharply keeled behind to apical third thence flattened and sloping 

 forward to the divided apex; outer forceps yellow, triangular with 

 the tips blunt or broadly rounded, clothed on outer side with 

 numerous pale hairs; fifth sternite yellow, broadly and deeply incised. 



Legs blackish; mid tibiae with one large anterior bristle near 

 middle; hind tibiae ciliate with or without a longer bristle near 

 middle; claws and pulvilli exceeding the length of last tarsal joint. 



