Pomona College Journal of Entomology 



555 



Prevailing color — Very dark brown or black throughout, nearly shiny, with 

 very little or no powdery covering, and no flocculence. Head — Very small, half as 

 wide as the thorax. Antennae — (Figure 186 E). Reaching just beyond thorax, 

 black, hairy, lengths of articles: I, 0.12 mm.; 11, 0.15 mm.; Ill, 0.26 mm. ; IV, 0.18 

 mm.; V, 0.16 mm.; VI, 0.22 mm. (unguis 0.01' mm.); total 1.09 nun. Rostrum — 



Figure 186. Pemphigus fraxini-dipetalae 



A, winged viviparous female; B. apterous viviparous female, stem mother; C, 

 young winged viviparous female; D, antenna of winged female; E, antenna of 

 apterous female. 



