74 



CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th SeR. 



~'.'-' I'l'.'. ""j^'-S "■■'-"Vt' ' -'r'"-- til 



Wing type 



W hind t.^SS=^ 

 type 



A Cauda ^^^ 



A hind r5^^--^ EOE del. 



Figure 18. — Aphis siphonella, new species 



remainder of the legs pale. Primary wings 2.7 mm. long. 

 Cornicles very short, black, 0.025 mm. long; the cauda dark, 

 0.16 mm. long. 



Apterous viviparous females (Paratypes) — Ten speci- 

 mens. Length 1.4 mm., width 1 mm. Prevailing color dark 

 brown, the body being slightly covered with a white piilver- 

 ulence. Antennae with articles I and II dusky; III, IV and 

 most of V pale, and the tip of V and all of VI black ; lengths 

 of the articles : I, 0.07 mm. ; II, 0.05 mm. ; III, 0.24 mm. ; IV, 

 0.22 mm. ; V, 0.24 mm. ; VI, 0.39 mm. (base 0.12 mm., filament 

 0.27 mm.) ; total 1.21 mm. There is a pair of short but dis- 

 tinct lateral prothoracic tubercles. Abdomen dark brown 

 with black markings on the dorsum and with four or more 



