Pomona College Journal of Entomology 



547 



costal vein narrow, green ; subcostal vein wide, merging into the full width of the 

 stigma; stigma long, narrow, four times as long as broad, beautiful bright green; 

 veins amber. Secondary — Length 2.2 mm., widtli 0.6 mm., base of the second 

 discoidal obsolete, all veins amber. Style — (Figure 181 E). Ensiform or nearly 

 cylindrical, black, little more than half the length of the cornicles, hairy, length 

 0.3 nun. 



APTEROUS VIVIPAROUS FEMALE (Figure 181 B) 

 Length of body 2.2 mm., width of abdomen 1.25 mm., robust nearly globular 

 form, with tuberculate, hairy dorsum. 



Prevailing color — Rich, dark olive green, shiny, iridescent, metallic. Head — 

 Narrow, but wider than long. Eyes — Small, black or very dark brown. Antennae 

 (Figure 181 G) — Situated on prominent front.il tubercles, reaching to ti]j of style, 

 hairy, basal two-thirds of arlicle III light, reni.uning dusky throughout, lengths of 

 articles: L 0.1 1 mm.; II, 0.08 mm.. Ill, 0.71 mm.; IV, 0. ig mm.; V, 0.1 mm.; VI, 

 0.8 mm. (spur 0.65 mm.) ; total 2.59 mm. Rostrum — Reaching to second coxse, 

 black. Prothorax — Scarcely wider than the head. Meso- and Me/a</iorrt.r— Widening 

 into abdomen so as to form a nearly globular body. Abdomen — Nearly as wide as 



Figure 181. Macrosiphum frigidae 

 A, winged viviparous female; B. apterous viviparous female; C, cornicle of 

 winged female; D, antenna of winged female; E, style of winged female; F, cornicle 

 of apterous female; G, antenna of apterous female; H, style of apterous female. 



