728 PROCEEDINGS OF THE NATIONAL MVSEVM. vol. xxxin. 



0.33 mm.; Avidth of abdomen, 0.34 mm. General color brown; body 

 irregularly mottled more or less with dark reddish hypodermal pig- 

 mentation, especially in the head and thorax. 



Head squarish, slightly narrower in front than behind ; cheeks 

 straight; front produced considerably between the bases of the anten- 

 na'; post-ocular l)ristles absent; frons bearing a very long spine on 

 each side at about the middle of the eye and not far removed from 

 its border; eyes rather small, together occupying about one-half the 

 wddth of the head ; ocelli present, the lateral ones placed rather 

 closely to the margins of the eyes and not larger than their largest 

 facets, anterior one not on the apex of prolonged vertex of head; 

 mouth cone short, blunt and thick, reaching somewhat beyond the 

 middle of the prosternum ; labium broadly rounded ; maxillary palpi 

 two segmented, the basal segment being short and cylindrical and 

 the apical one rather long and slender. Antenna^ borne on somewhat 

 produced front of head ; their bases separated by about one-half the 

 Avidth of their basal segment. Relative lengths of segments as fol- 

 lows : 



10.5 12 20 18 16 15 10 10.1 



Second, fourth, and fifth segments thickest; one cylindrical; two 

 constricted somewhat at base, truncate at apex ; three very narrow at 

 base, clavate; four, five, and six clavate; seven cylindrical; eight long 

 conical. The four basal segments yellow; five yellow at base but 

 somewhat shaded with brown at apex; six yellowish brown at base, 

 apical two-thirds strongly shaded with brown ; seven and eight deep 

 brown. Spines slender and weak ; sense cones simple, one on segment 

 three and two each on segments four and five, rather long and blunt 

 pointed. 



Prothorax considerably wider than and about two-thirds as long 

 as the head. On or near each anterior and posterior angle there is 

 a rather short but conspicuous knobbed spine; all other spines incon- 

 spicuous. Pterothorax wdth sides nearly straight and parallel. Legs 

 medium to rather long and slender ; fore pair the shortest, hind pair 

 the longest; fore femora somewhat thickened; fore tarsi unarmed; 

 each fore femur with a long, slender, erect spine toward the base 

 wuthin. Wings rather short and Aveak but with long, heavy, dark 

 colored fringes; fore pair light brown in color Avith a transpai-ent 

 cross band somewhat before the middle and another similar one just 

 before the tip ; hind Avings apparently entirely clear. 



Abdomen rather long and slender, cylindrical to about the ante- 

 rior margin of the seventh segment, from which it tapers to the tube. 

 Tube slightly more than two-thirds as long as the head, swollen some- 

 Avhat toAvard the base ; some of the terminal hairs nearly as long as the 

 tube. Spines on sides and toward the tip of abdomen long, rather 



