A SYNOPSIS OF THE APHIDIDAE 97 



Records. Ceanothus integcrrimus; Coif ax, Placer County (Clarke) ; Witch 

 Creek, San Diego County, June, 1916: C. cuneatus; Stanford University (David- 

 son), November, 1910 (Morrison), October, 1915 (R. A. Vickerey) : C. thysiflorus; 

 Bear Creek Gulch, Santa Clara County, April, 1911 (Morrison) : C. hirsuti; Santa 

 Paula (Essig). 



This is a widely distributed species, having been found on Ceano- 

 thus as far north as Placer County, and as far south as San Diego 

 County. It is seldom abundant, however. The species that Essig 

 described as A. ceanothi -hirsuti n.sp. is undoubtedly the same as 

 Clarke described. 



117. Aphis cerasifoliae Fitch 



Figtures 288 to 292 



Fitch, Eept. Ins. N. Y., vol. 1, p. 131, 1855 (orig. desc.). 

 Patch, Maine Agr. Exp. Sta., Bull. 233, p. 260, 1914 (desc.). 



Record. Prunus emarginata; Wynola, San Diego County, June, 1916. 



This aphid was found abundantly curling the terminal leaves of 

 wild cherry near Wynola (3700 feet altitude), San Diego County, in 

 June, 1916. Alate and apterous viviparous females as well as nymphs 

 were abundant in the curled leaves. The apterae and nymphs were 

 slightly pulverulent. This species corresponds very closely to Aphis 

 cerasifoliae Fitch as described by Patch (op. cit.), although there are 

 some minor differences. Following is a copy of Patch 's description of 

 the Maine specimens of this species : 



. This well defined species is common on both the native choke cherry, Prunus 

 virginiana, and the western P. demissa Walp. introduced in a nursery row on our 

 campus. 



Apterous female. Head, pale green or water whitish, beak short, extending 

 to second coxae, eyes, antennae with I, II and III concolorous with head, distal 

 half darker to black, III with no sensoria, proportions as shown in figure; pro- 

 thorax pale green, lateral tubercles present; thorax green with dark green mid- 

 dorsal line, femora and tibiae pale and tarsi black; abdomen pulverulent, pale 

 green with dark green median line and dark green transverse lines between seg- 

 ments, lateral tubercles present, cornicles pale with dusky tips, slender, slightly 

 tapering, and approximately twice the tarsus in length, cauda white with dark tip; 

 conical, being broad at base and abruptly tapering. 



Nymphs and pupae are also pulverulent and have dark green middorsal and 

 transverse intersegmental line, though these are not always well defined in the 

 pupa which has two lateral dark green lines on thorax. 



Alate female. Head black, beak short, not reaching to second coxae, eyea 

 black, antennae dark, III with from about 12 to 18 large sensoria about the size 

 of the terminal one on V, IV with from none to several sensoria like those on III, 

 proportions of joints as shown in the figure; prothorax green with black trans- 

 verse band, lateral tubercles present; thorax black, wings iridescent with slender 

 brown veins and large dusky stigma with pointed tip; commonly though not 



