APHIDIDAE OF SOUTHERN CALIFORNIA II 



E. O. ESSIG. 



Rhopalosiphuin violae Pergande 



In the last number of the Journal this aphid should have been credited to 

 Pergande, who described it in Canad. Ent. vol. 32, page 29. 1900. 



Aphis citri Ashmead 

 Winged Viviparous Female (Figure 33) — Length 1.2 mm., width 0.7 mm., 

 wing expansion 2.65 mm. Prevailing color of thorax dark, abdomen dull green. 

 Head narrower than thorax, nearly twice as wide as long. Compound eyes 



Figure 33. A. and B. Aphis citri 



large, black, with long terete tubercles just behind the outer margin. Antennae 

 (Fig. 34 1) arise from inconspicuous tubercles, nearly black, longer than the 

 body, 1.42 mm., six-articled with a nail-like process near the apex of the sixth 

 article. The lengths of the respective articles are as follows: I 0.5 mm., 11 0.07 

 mm., Ill 0.4 mm., IV 0.35 mm., V 0.3 mm., VI 0.45 mm. Distribution of the 



