2 INSECUTOR INSCITI^ MENSTRUUS 



two dark, transverse, chitinous lines, the posterior one of 

 which extends entirely across the head behind the eyes. Eyes 

 setose, two-thirds as long as head, as wide as their dorsal inter- 

 val. Ocelli of posterior pair twice the diameter of anterior 

 ocellus, a little less than half as wide as their interval. 

 Antennae about three times as long as head; segment 3 very 

 slender, subconical, about three times as long as greatest 

 width, with deep incisions at basal sixth and basal two-fifths; 

 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 about three times as long as 

 wide, nearly cylindrical ; segments 1 and 2 nearly concolorous 

 with head ; 3 pale grayish yellow ; 4 blackish brown, sometimes 

 slightly paler apically ; remainder of antenna blackish brown. 



Prothorax about one and one-third times as long as head 

 and about 1.8 times as wide as long, sides and posterior margin 

 rounded, anterior margin straight or slightly concave ; notum 

 with a few short spines, its surface free from sculpture except 

 for two or three anastomozing striae at anterior margin. Wings 

 of fore pair half as wide at middle as near base, the greatest 

 subbasal width (exclusive of scale) about one-eighth the length 

 of wing; costal margin, anterior vein, and posterior vein with 

 about 26, 22, and 18 short, stout spines, respectively, these be- 

 ing closer together toward base of wing. 



Abdomen stout ; pubescence very sparse, as in H. flavicornis 

 (PI. I, fig. 3), disposed on prominent, almost reticular, lines; 

 posterior margins of abdominal tergites 1-7 fringed at sides 

 with contiguous, chitinous scales or plates, whose apical mar- 

 gins are very irregularly produced ; 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 plates 

 whose apical margins are produced into about ten slender 

 spines. 



Measurements of holotype : Length 0.960 mm. ; head, length 

 0.090 mm., width 0.154 mm. ; prothorax, length 0.121 mm., 

 width 0.221 mm. ; pterothorax, width 0.254 mm. ; fore wing. 



