SAKCOniAGA AND ALLIES 3.5 



cial impressiQii red, which color spreads broadly up 

 and down and runs behind the eye ; antennte and palpi 

 red, the latter rather small; back of head bulging, 

 with two principal rows of black hair and very scanty 

 pale beard ; lateral verticals barely a little larger than 

 adjacent hairs. 



Thorax and abdomen uniform smooth gray poUi- 

 nose w^ith a tinge of yellowish; mesonotum with three 

 brown pollinose stripes, the central one more slender. 



Hypopygium small, yellow, opaque like abdo- 

 men ; first segment with a few hairs, two of which have 

 the size of small bristles; second segment with a few 

 hairs ; forceps brown, straight, rather evenly and rap- 

 idly tapering, on the back pollinose and with recum- 

 bent hair, at tip sliglitly hooked, accessory plate yel- 

 low, small, slightly elongated; posterior clasper yel- 

 low, slender and strongly curved toward tip and with 

 some long hairs on the front side; anterior clasper 

 shorter and stouter Init thin in profile, not hooked, 

 yellow ; penis with short and indistinct basal segment, 

 the distal one large, globose and complicated. In tlie 

 side view there are two chitinous processes extending 

 forward in a membrane which is the outer wall of a 

 swollen, whitish, half -transparent body, which ex- 

 tends forward into a second swollen mass, evidently 

 of soft texture; on the posterior side or the back of 

 the segment is a complex plate of chitin, attached at 

 its hind corners to the more distal of the two pro- 

 cesses, and in its middle behind giving way to a con- 

 cavity filled with wliite memln-ane; fifth sternite great- 

 ly retracted, invisible. 



Legs yellow, ])ollinose, the tarsi distinctly ])lack- 

 ened from the base; bristles of all femora sparse; 

 middle ones not with combs; middle tibiiu with two 

 or three small bristles on outer front side; liind tibiju 

 on inner side with just a few long, erect villous hairs, 

 behind with two long, divergent bristles at the mid- 

 dle, and })elow these one on the outer front side. 



AVing with yellowish veins; no costal spine; third 



