4 INSECUTOR INSCITI^ MENSTRUUS 



rugose in front of anterior ocellus, smooth between ocelli, and 

 with four or five anastomozing striae on occiput ; frontal costa 

 with deep, U-shaped emargination ; ocellar area delimited 

 anteriorly and posteriorly by two dark, transverse, chitinous 

 lines, the posterior one of which extends entirely across the 

 head as a heavy chitinous line just behind the eyes. Eyes 

 setose, about 0.7 as long as head, as wide as their dorsal inter- 

 val. Ocelli of posterior pair twice the diameter of anterior 

 ocellus, about half as wide as their interval. Antennae about 

 2.7 times as long as head; segment 3 slender, subconical, 

 about three times as long as greatest width, with deep incisions 

 at basal sixth and third; 4 a little more than half as wide as 

 long, roundly tapering to base ; 5-8 more or less barrel-shaped, 

 with sense cones, 5 with indications of a brief pedicel ; 9 a 

 little more than three times as long as wide, nearly cylindri- 

 cal ; segments 1 and 2 light yellowish brown, very much paler 

 than head; 3-7 lemon yellow, or 5-7 slightly darkened with 

 gray ; 8 and 9 shaded with gray. 



Prothorax about 1,4 times as long as head and about 1.7 

 times as wide as long, sides and posterior margin rounded, 

 anterior margin straight; notum with a few short, incon- 

 spicuous spines, its surface nearly rugose, the anastomozing 

 lines of sculpture almost forming polygons. Wings of fore 

 pair slightly more than twice as wide at base as near middle, 

 the greatest subbasal width (exclusive of scale) about one- 

 eighth the length of wing; costal margin, anterior vein, and 

 posterior vein with 32, 23 and 18 short, stout spines, respec- 

 tively. 



Abdomen stout ; pubescence very sparse, disposed on promi- 

 nent, almost reticulate, lines; posterior margins of abdominal 

 tergites 1-7, fringed at sides with contiguous, chitinous scales 

 or plates whose apical margins are very evenly produced in 

 short slender spines (PI. I, fig. 3) ; segment 1 unarmed on 

 middle portion of posterior margin; segments 2-5 with a 

 few slender spines at middle of posterior margin; 6 and 7 

 with a regular fringe of similar spines between the lateral 

 plates; sternites fringed posteriorly with regularly disposed 



