112 THOMAS SAY FOUNDATION 



one pair median and 3 lateral, fourth with a row of 

 about 16. 



Hypopygium of moderate size, black, opaque; 

 fiirst segment with 4 to 6 stout bristles in a transverse 

 row near tip; second with long, erect hairs, a few of 

 which may be called bristles; forceps black, slender, 

 tapering, widely diverging, bent forward near base, 

 thence nearly straight to apex; accessory plate 

 triangular; posterior clasper robust, excised before 

 tip, and with a long hair; anterior clasper shining 

 brown-black, wide at base, narrowing to a long slen- 

 der curved tip, and at the place of narrowing bearing 

 a supplementary point on outer side; penis rather 

 long, basal joint distinct, the distal one globose, bear- 

 ing on the front side near base an ascending curved 

 median organ, white except its base and edges; con- 

 nected with this organ toward the base a median yel- 

 low process ending in a minute hook. 



Legs black; median femora on hind side below 

 with about four stubby spines (a short comb) ; mid- 

 dle tibia with only one small bristle on outer front 

 side, considerably below middle; hind tibict not vil- 

 lous. 



Wing subhyaline; fourth rein ending only a lit- 

 tle before apex (one-third the length of the fifth cos- 

 tal segment) ; third costal segment shorter tlian fifth; 

 first vein hairv; third hairy over half way to cross- 

 vein; no costal spine. 



Female not known. 



Length 7 mm. 



One male, Los A mates, Guatemala, Jan. 16-20, 

 1905, collected by Professor Jas. S. Hine. 



Holotype. — In collection of Professor Hine. 



