196 THE CANADIAN ENTOMOLOGIST 



Thripsaphis producta, n. sp. 



Our collections indicate this as the most abundant species in 

 Colorado occurring upon Carex. With the generic characters 

 given above, only a brief characterization of this species seems 

 necessary. 



Alate Viviparous Female. — General colour blackish, legs and 

 antennae black; length 2.00; wing 2. 50 x. 70; hind tibia, .60; an- 

 tenna, 1.15; segments of antenna in following proportions: III, 

 15; IV, 9; V, 8; VI, 7; spur, 4; sensoria on joint III, 9 to 11, rather 

 large and slightly transverse; venation of fore wing normal and 

 veins rather heavy; hind wing with first cross-vein weak or lack- 

 ing, usually quite plainly seen before clearing in balsam. See 

 figures 1, 2, 3. 



Apterous Viviparous Female. — Colour (in balsam) dark 

 yellowish brown, darkest on lateral margins and back of cornicles; 

 legs black; antennae- black to near base; vertex convex, being rather 

 strongly produced at the middle; length of body 2.10 ; width 

 .70 ; antenna .95; third segment with 2-3 small circular sensoria 

 near distal end; segments III, .30; IV, .18; V, .15; VI, 13; spur 

 .08 ; hind tibia .48; beak very short, but little surpassing the first 

 pair of coxae; femora not specially thickened for jumping; hairs 

 few, short, and simple; anal plate bi-lobed; 8th tergite produced 

 and rather sharply rounded posteriorly. Figures 2, 3. 



Aspidaphis, n. gen. 



Wing venation normal; antennae 5-jointed, less than one-half 

 as long as the body; antenna and body very free from hairs, no 

 lateral tubercules on prothorax or abdomen; cornicles weak, re- 

 cumbent, shorter than hind tarsus, without fiange, somewhat 

 clavate, and with opening lateral, on the inner side, near the distal 

 end; eighth tergite of abdomen developed into a very large tri- 

 angular shield, which, in the type species, extends well beyond the 

 end of the cauda. Eyes not tuberculate. 



The three specially diagnostic characters are: Antenna, 5- 

 jointed; cornicles without flange and with side opening, and the 

 large precaudal shield. See figures 10 to 23. 



Aspidaphis polygoni, n. sp. 



This aphid, combining some rather unusual structures, was 



