188 THOMAS SAY FOUNDATION 



Hypopygiuni large; first segment rather dark 

 red, partially brown, pollinose above, with a sparse 

 row of long hairs behind; second segment large and 

 globose, but rather flat behind in profile, without 

 bristles ; forceps brownish black, terminal part in pro- 

 file greatly resembling a foot, near the base slender; 

 accessory plate brown, elongated, with broadty 

 rounded tips; penis without visible division, greatly 

 elongated and broadly curved forward, and then 

 doubling upon itself, where it is expanded into two 

 large concave plates, the whole having a striking re- 

 semblance to a young bean plant when it first comes 

 up out of the soil. On the inner side of the plates are 

 two long undulating thread-like processes and a cen- 

 tral black structure; posterior claspers long, shining, 

 brownish, with a black central hooked tip ; at its basal 

 hind angle, usually difficult to see, there is a small 

 black additional hook; anterior clasper in the form 

 of a wide brown blade without any hook or distinct 

 apical point; fifth sternite with a pair of large and 

 conspicuous black brushes, at the apical end of which 

 are a few bristles. 



Legs black; middle femur with a short, stubby 

 comb below near the apex on the hind side; middle 

 tibia with one bristle on the outer front side and some 

 villous hairs on the inner side of the apical half; hind 

 tibia with distinct but not very long villosity, spread- 

 ing both ways. 



Wing hyaline, no costal spines ; third costal seg- 

 ment a little longer than the fifth ; first vein bare, third 

 with a few hairs. 



Female. Front .258 of head (average of two, — 

 .250 and .265), narrowest at vertex; the usual orbital 

 bristles; ocelli small; outer vertical bristles well de- 

 veloped ; lower f rontals more strongly diverging than 

 in males. The yellow beard is more striking than in 

 the males and extends forward to a group of hairs 

 around the vibrissa; preapical bristles of scutellum 

 small and not in line with the apicals, which are stout. 

 Genital segments yellow, with deep golden pollen 



