60 THOMAS SAY FOUNDATION 



Abdomen gray, densely gray pollinose, tessel- 

 lated, the fourth segment mostly red ; first and second 

 with only lateral, third with row of 10 or 12 marginal 

 bristles; fom*th with row of about 18. 



Hypopygium red ; first segment rather pollinose, 

 with a row of small bristles at hind margin; second 

 segment red, rather small and flattened; forceps 

 small, red except tip, rather evenly pointed, posterior 

 side basally with hair sloping away from apex; ac- 

 cessory plates -yellow, finger-shaped, bare; both clasp- 

 ers of ordinary form; penis with globose, blackish dis- 

 tal segment, the apical portion of which curves for- 

 ward and is diA^ided mesially into two flat pieces side 

 by side, the side plates extending considerably for- 

 ward; fifth sternite concealed, pale yellow, the 

 branches slender, bearing a few black hairs. 



Legs yellow, or the femora partially infuscated, 

 middle tibia with one bristle on outer front side ; mid- 

 dle femur with moderate l)ristles below on hind side, 

 not forming comb; hind tibia with very sparse villos- 

 ity, only a few erect hairs, mostly on inner side ; claws 

 and pulvilli long, the latter yellow. 



Wings hyaline, third and fifth costal segments 

 about equal; first vein with only a few coarse hairs; 

 third vein hairy almost to crossvein ; no costal spine. 



Female. Front .252 of head (average of five,— 

 .231, .244, .246, .258, .282) ; orbitals and outer ver- 

 ticals present; lower frontals as in male, or a very 

 little more diverging than in the male, but not ex- 

 tending any further down; parafacials with a very 

 few liairs, minute and mostly pale; bucca one-sixth 

 the eyeheight; scutellum with three marginal (the 

 middle small), one pair subapicals (almost apical in 

 position) ; genital segment red with roundish or tri- 

 angular opening; middle tibia with 2 bristles on outer 

 front side; middle femur without combs; first vein 

 with numerous hairs . 



Length of male 7l/o to 8^/0, of female 6 to 8 mm. 



Six males, seven females, Opelousas, La., March, 

 April and May, 1897, all in Hough collection. One 



