Vol.1] 



Essig. — Aphididae of California 



319 



IV 0.21 mm., V 0.16 mm., VI 0.36 mm. (base 0.09 mm., filament 

 0.27 mm.), total 1.15 mm. The usual sensoria occur on articles 



V and VI with none on III. The rostrum is pale, transparently 

 white and reaches to the third coxae. The prothorax has a large 

 lateral tubercle at the base and on each side of the body a tubercle 

 is located at the unions of the prothorax and mesothorax and the 

 metathorax and abdomen. The legs are normal in length, trans- 

 parently white with the tips of the tibiae and the tarsi dusky. 

 The cornicles (fig. 10, D) are dusky or black, somewhat wider at 

 the base with a medium-sized lip at the mouth, imbricated and 



Fig. 11. Aphis cari, n. sp. Winged viviparous female. A, dorsal aspect ; 

 B, tarsus; C, cauda; D. cornicle; E, antenna. (Original.) 



nearly twice as long as the hind tarsi (fig. 10, B), the length 

 being 0.33 mm. and the width at the base 0.09 mm. The cauda 

 (fig. 10, C) is dusky, nearly as long as the cornicles, rather 

 slender, with a distinctly wider base for about two-thirds the 

 length when viewed dorsally or ventrally. 



WINGED VIVIPAROUS FEMALE— VIRGOGENIA 



The winged viviparous female is pale yellowish or greenish 

 with dark green or black head, antennae, thorax, cornicles, apices 

 of the femora, and tibiae and all of the tarsi. The length aver- 

 ages 1.7 mm. and the width 1 mm. The antennae (fig. 11, E) 

 are relatively short, reaching only slightly beyond the middle of 

 the abdomen. They are du.sky or black throughout and imbri- 



