20 INSECUTOR INSCITI^ MENSTRUUS 



and apex of tenth abdominal segment darkened with orange ; 

 antennal segments 6-8 largely blackish brown, remainder light 

 yellowish, 2, 4, and occasionally 5 slightly infuscate apically; 

 fore wings uniform light yellowish. 



Head only about one and one- fourth times as wide as long, 

 sides almost straight and parallel, usually broadest across eyes ; 

 occiput with a few faint anastomozing lines ; interocellar and 

 one pair of postocular bristles alone prominent, slender, yel- 

 lowish, the former longer; other bristles slender, pale, incon- 

 spicuous. Eyes somewhat less than half as long as head, about 

 three-fifths as wide as their interval. Ocelli of posterior pair 

 distinctly behind middle of eyes, rather widely separated, equal 

 in size to anterior ocellus; ocellar pigment orange red. An- 

 tennae 2.3 times as long as head, form and structure as in 

 figure (PI. II, fig. 5) ; segment 3 nearly as long as 6 and about 

 2.7 times as long as wide ; 4 slightly shorter, nearly three times 

 as long as wide ; 5 still shorter, about 2.6 times as long as 

 wide ; 6 a little longer than 3, slightly more than three times as 

 long as wide, abruptly constricted at base ; 7 and 8 small, cylin- 

 drical, 8 slightly longer and narrower than 7 ; segment 1 color- 

 less, transparent; 2-5 yellowish, with 2, 4, and occasionally 5, 

 slightly infuscate apically; 6 yellowish in basal third, blackish 

 brown beyond ; 7 and 8 blackish brown. 



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

 and nearly 1.3 times as wide as long, quadrangular with the 

 angles rounded; pronotum smooth; bristles moderately long, 

 pale in color (PI. II, fig. 4). Wings of fore pair uniform 

 light yellowish gray, about fourteen times as long as width at 

 middle ; spines brownish yellow, equidistant, about 23 on costa, 

 19 on anterior vein, and 16 on posterior vein. 



Abdomen of normal form; tergite of segment 1 with very 

 faint lines of sculpture, other segments smooth above; seg- 

 ment 10 divided above; abdominal bristles strong, yellowish 

 brown. 



Measurements of holotype : Length 1.14 mm. ; head, length 

 0.124 mm., width 0.156 mm. ; prothorax, length 0.152 mm., 

 width 0.196 mm. ; pterothorax, width 0.264 mm. ; fore wing. 



