INSECUTOR INSCITI^ MENSTRUUS 13 



Head usually very slightly wider than long, broadest behind 

 eyes, about 0.6 as long as prothorax, frontal costa narrow, 

 occiput with three or four very faint striae, eyes bordered with 

 a chitinous line behind ; cheeks slightly arched, usually about 

 one-sixth as long as head ; front produced, its sides about two- 

 thirds as long as cheeks ; about eight pairs of short, stout 

 spines near base of antennae in addition to a slightly longer 

 pair opposite anterior fifth of eyes; three additional pairs of 

 minute bristles at posterior margin of eyes on dorsal surface. 

 Eyes about half as long as head. Ocelli of posterior pair 

 widely separated, equal in size to anterior ocellus. Antennae 

 fully 1.7 times as long as head ; segments 1-3 yellow or yellow- 

 ish, 1 usually infuscate throughout, 3 infuscate apically, 4-8 

 brown or with 4 paler ; segment 1 rounded, swollen, on ventral 

 surface about two-thirds as long as wide ; segment 2 inverted 

 foot-shaped, its axis about two-thirds as long as width along 

 line parallel to apical margin; 3 pyriform, with rather long, 

 slender pedicel, and three- fourths as wide as long; 4 and 5 

 suboval, slightly longer than wide ; 6 nearly twice as long as 

 wide, broadest at basal two-fifths, roundly tapering to apex; 

 7 and 8 about equal in length, each about one-third as long as 

 6, 8 about three times as long as wide. 



Prothorax about one and two-thirds times as long as head 

 and nearly one and one-half times as wide as long; pronotum 

 sparsely spinose and with anastomozing striae ; hind angles with 

 only one moderately long bristle, directed posteriorly. Ptero- 

 thorax unusually broad, about one and one-fourth times as 

 wide as prothorax and slightly wider than abdomen; meso- 

 scutum with the striae broken up into chitinous arcs. Wings 

 of fore pair about fourteen times as long as width at middle, 

 slightly sinuate in form, rather strongly curved in apical third, 

 shaded with gray, especially at base and apex and on scale, 

 distinctly paler subbasally ; anterior vein with about 8 bristles 

 and posterior vein with 3 to 5. Legs of fore pair with the 

 femora not at all sinuate on outer surface at apex, the tibiae 

 nearly as wide as long, and the tarsi about 0.6 as wide near 

 base as long. 



Abdomen slightly narrower than pterothorax, almost per- 



