Vol.1] Essig. — Aphididae of California 315 



Number Article III Article IV Number Article III Article IV 



10 



11 



12 

 13 

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 17 

 18 



The rostrum is pale with dusky tip and reaches slightly beyond 

 the third coxae. The legs are pale yellow with the apices of the 

 tibiae and all of the tarsi dusky. The tarsi (fig. 8, E) are very 

 small. The abdomen is yellowish, pinkish or reddish in color 

 with a large brown or black patch on the dorsum and a marginal 

 row of small dark spots on the sides. The large dorsal dark 

 patch may in some cases cover all of the dorsum excepting the 

 extreme base and the area behind the cornicles. The cornicles 

 (fig. 8, C) are whitish or yellow, fc|intly imbricated, nearly 

 cylindrical, with slightly wider base and small flare at the month. 

 The length averages 0.47 mm., or about three times the length of 

 the hind tarsi. The caiida (fig. 8, D) varies from yellowish to 

 pale pink or reddish, is gradually pointed and about two-thirds 

 as long as the cornicles. 



WINGED VIVIPAROUS FEMALE— VIRGOGENIA 



The winged viviparous female is yellow or reddish with a 

 number of dark brown or black markings over the body. The 

 length averages 1.4 mm., and the width 0.45 mm. The body is 

 sparsely covered with simple and knobbed curved spines. The 

 head is black and the compound eyes red. The antennae (fig. 9, 



