INSECUTOR INSClTlyE MENSTRUUS 23 



ties rather short and inconspicuous, costa with about 29, an- 

 terior vein with 21, posterior vein with 16. 



Abdomen slightly broader than pterothorax ; tergites of seg- 

 ments 1-8 at sides with a few oblique, anastomozing, dark 

 lines, and a few short, rounded, chitinous teeth on posterior 

 margin ; segment 8 fringed posteriorly with acuminate chitinous 

 projections ; segment 9 about half as long as 10 ; sternite of 

 segment 3 with a transversely elliptical pale area just before 

 the middle, slightly smaller than first antennal segment; ab- 

 dominal bristles rather short and weak. 



Measurements of holotype : Length 1.08 mm. ; head, length 

 0.108 mm., width 0.127 mm.; prothorax, length 0.120 mm., 

 width 0.186 mm. ; pterothorax, width 0.264 mm. ; fore wing, 

 length 0.798 mm., width at base 0.069 mm., at middle 0.054 

 mm. ; abdomen, width 0.264 mm. 



Antennal segments 1 2 3 4 5 6 7 8 



Length (\i) 21 32 45 39 32 46 8 14 



Width (yi) 23 24 21 20 17 18 7 5 



Total length of antenna, 0.237 mm. 



Male (macropterous). — Length about 0.8 mm. Color and 

 structure differing but slightly from that of female. Abdomi- 

 nal segments 3-7 beneath with a nearly circular pale area basal 

 to middle ; tergite of segment 9 at middle with a transverse row 

 of four nearly equidistant bristles three-fourths as long as the 

 segment, between the outer ones of which, and nearly on a 

 line with their bases, are a pair of circular pits and directly 

 distal to these a pair of minute spines. 



Measurements of allotype : Length 0.840 mm. ; head, length 

 0.108 mm., width 0.129 mm. ; prothorax, length 0.108 mm., 

 width 0.158 mm. ; pterothorax, width 0.204 mm. ; fore wing, 

 length 0.648 mm., width at base 0.058 mm., at middle 0.045 

 mm. ; abdomen, width 0.180 mm. 



Antennal segments 12345678 



Length (ji) 18 31 41 37 30 44 10 15 



Width (n) 23 23 18 18 16 17 9 5 



Total length of antenna, 0.226 mm. 

 Described from 95 females and 9 males taken on a compo- 



