INSECUTOR INSCITI^ MENSTRUUS 35 



Abdomen slightly wider than pterothorax. Tube short, 

 about half as long as head, not quite twice as long as basal 

 width, about twice as wide at base as at apex, sides straight. 

 Terminal bristles a little longer than tube; bristles at apex 

 of segment 9 nearly twice as long as tube. 



Measurements of holotype : Length 3.34 mm. ; head, length 

 0.444 mm., width 0.276 mm.; prothorax, length 0.216 mm., 

 width (inclusive of coxse) 0.448 mm.; pterothorax, width 

 0.576 mm.; abdomen, width 0.612 mm.; tube, length 0.216 

 mm., width at base 0.120 mm., at apex 0.060 mm. 



Antennal segments 1 2 3 4 5 6 7 8 



Length {[i) 87 90 153 134 98 78 65 38 



Width (jx) 50 42 41 46 39 39 33 18 



Total length of antenna, 0.743 mm. 

 Male (macropterons). — Much like female but smaller 

 (length about 2.8 mm.). Head much broader across eyes, 

 which are more enlarged and more prominent than in female 

 and with a narrower interval. 



Measurements of allotype : Length 2.80 mm. ; head, length 

 0.444 mm., width 0.252 mm.; prothorax, length 0.190 mm., 

 width (inclusive of coxae) 0.388 mm.; pterothorax, width 

 0.480 mm.; abdomen, width 0.409 mm.; tube, length 0.240 

 mm., width at base 0.100 mm., at apex 0.059 mm. 



Antennal segments 1 2 3 4 5 6 7 8 



Length (\i) 72 78 156 135 105 82 62 36 



Width ([x) 44 37 36 40 35 35 31 19 



Total length of antenna, 0.726 mm. 

 Described from 11 females and 5 males taken on cotton, 

 Department of Piura, Peru, by Dr. Charles H. T. Townsend. 

 They were transmitted to Mr. Paul R. Jones, who determined 

 the species as new and later forwarded the material to the 

 writer for naming and description. 



O. gossypii, from the form of the head and antennae, the 

 presence of long anteocular bristles, and the short tube, is 

 closely related to O. elongatus and O. intermedius. Both of 

 these were described by Bagnall from Venezuela. It appears 

 to be distinct from them, however, by the color of the third 

 antennal segment, which is yellow, abruptly tipped with black. 



