A SYNOPSIS OF TEE APHIDIDAE 



151 



Subfamily Phylloxerinae Dreyfus 



This subfamily consists of two groups, the Chermisina and the 

 Phylloxerina. Below is a key to these two groups taken from Van 

 der Goot: 



1. Body always with wax glands. Antennae of adults three-jointed, seemingly 

 five-jointed, with three large sensoria. Gonapophyses appearing as three 



short lips. Sexuales dwarfed, with beak Group Chermisina 



Body usually without wax glands. Antennae of adults three-jointed, with two 

 large sensoria. Gonapophyses seem to be lacking. Sexuales dwarfed, with- 

 out beak Group Phylloxerina 



Group Chermisina Borner 



This group consists of three genera, Pineus Shimmer, Cnapholodes 

 Macq., and Chermes Linn, as it is generally considered, although some 

 authors add more, as Gillettea Del Guercio and Guercioja Mordw. In 

 California but one of these genera is represented, and that by but 

 two species. 



46. Genus Chermes Linnaeus 

 Linnaeus, Syst. Nat., vol. 10, 1758. Type Chermes sambuci Linn. 



178. Chermes cooleyi Gillette 



Gillette, Proe. Acad. Nat. Sci. Phila., vol. 69, p. 3, 1907 (orig. desc.). 

 Davidson, Jour. Econ. Ent., vol. 2, p. 299, 1909. C. coweni Gill. (list). 

 Davidson, Jour. Econ. Ent., vol. 3, p. 372, 1910. C. coweni Gill. (list). 

 Brannigan, Mon. Bull. Cal. Comm. Hort., vol. 4, p. 285, 1915 (list). 



Records. Pseudotsuga taxi folia, Pinus pinea; San Francisco Bay region, Sac- 

 ramento Valley. 



This species was first reported in California by Davidson, who 

 found it on Douglas fir at Stanford University. Essig lists it from 

 San Francisco, San Mateo, and Santa Clara counties on Douglas fir. 

 In 1915 it was reported twice, once in Sacramento on Douglas fir, and 

 once on Italian stone pine. The author has specimens from E. J. 

 Vosler taken in Sacramento where it was found infesting the twigs 

 and needles of Italian stone pine. Only the apterous females were 

 present, however. 



