22 NEW CALIFORXIAN APHIDIDAE 



hind tarsi, .102-119 mm. (ave. .115 mm.) wing length, 1.7-1.82 mm. (ave. 

 1.761 mm.); wing width, .561-.765 mm. (ave. .694 mm.); wing expansion, 

 3.70-4.23 mm. (ave. 4.05 mm.). 



Apterous viviparous female. — Prevailing color pale yellowish-green, shiny. 

 Eyes black. Antennae, beak except apex, and legs except tarsi, tips of tibiae, 

 and distal one-half of hind femora, pale. Cauda, apex of beak, tarsi, tips of 

 tibiae and femora, and apical one-half of hind femora dusky. Abdomen very 

 convex (fig. 7), in life being as high as it is wide. Cauda not visible from above 

 in living specimens, although in mounted material it is very conspicuous. An- 

 tennae are short, reaching only to the mesathorax, beak barely reaching second 

 coxae. Abdomen without lateral tubercles in so far as can be discerned.. 

 Cornicles merely pores. The great convexity of the abdomen (fig. 7) is a 

 distinguishing character. 



Measurements: Body length, 1.15-1.29 mm. (ave. 1.244 mm.): width of 

 abdomen (mounted), .85-1 mm. (ave. .92 mm.); height of abdomen (mounted), 

 .85-1.03 mm. (ave. .91 mm.): antennae total, .51-.54 mm. (ave. .52 mm.); 

 Ill, .136-. 170 mm. (ave. .15 mm.); IV, .093-. 102 mm. (ave. .097 mm.); V, .17- 

 .204 mm. (ave. .19 mm.): cauda, .187-.204 mm. (ave. .195 mm.): hind tarsi, 

 .119 nmi.: diameter of cornicle at base, .035 mm.; diameter of opening, .021 

 mm. 



