16 MISCELLANEOUS STUDIES 



is distinct from our western one. In 1911 Davis described a species 

 of woolly aphis from oak under the name of Phyllaphis querci (Fitch) 

 stating that it is the same one as listed by Davidson. Baker proposes 

 the name Phyllaphis quercicola for this species described by Davis. 

 Consequently it is so listed in this paper. This species is not a typical 

 Phyllaphis, but it fits that genus better than any other so is placed 

 there provisionally. The figures (1420) are from a specimen of alate 

 male in the Davidson collection in Stanford University. 



Tribe Callipterini Wilson 



Wilson, Can. Ent., vol. 42, p. 253, 1910. 



The genera included in this tribe differ somewhat as considered by 

 various entomologists. Since Wilson has worked out the synonomy 

 of the various genera very well he is followed in preference to some 

 of the European authors, although there are some points in which 

 he is mistaken. For instance, he places Pterocalli-s Passerini, Callip- 

 teroides Mordwilko, Tuberculatus Mordwilko, Subcallipterus Mord- 

 wilko, and Therioaphis Walker as synonyms of Myzooallis Passerini. 

 In regard to this, he states, "In 1894 Mordwilko used A. coryli Goetze 

 as the type of his genus Callipteroides, but as this species ..." He 

 is mistaken in this, for in the paper referred to, Mordwilko used 

 A. coryli Goetze as the type of the genus Myzocallis Passerini, and in 

 1908 he gave as the type of Callipteroides, Callipterus nigritarsus 

 Heyden (betulae Koch). If nigritarsus Hey den is a synonym of 

 betulae Koch, as Mordwilko indicates, then Callipteroides is a synonym 

 of Enceraphis Walker, for C. betulae Koch certainly falls into this 

 genus, as described by Wilson himself. The key to the California 

 genera below is adapted from Wilson's key (Can. Ent., vol. 42, pp. 

 253-254, 1910). 



KEY TO CALIFORNIA GENERA OF CALLIPTERINI 



1. Antennal tubercles prominent (fig. 21); antennae always exceedingly long.... 2 



Antennal tubercles wanting or very small (fig. 22) ; antennae variable, some- 



times shorter than the body 3 



2. Cornicles very long and large (figs. 23-24) 4 



Cornicles very short and more or less constricted in the middle 5 



Cornicles little more than pores (fig. 25). Wings held horizontal at rest. 



Monellia Oestlund 



3. Cornicles distinct, usually being longer than broad in the middle (fig. 26) 6 



Cornicles little more than pores, and broader than long (fig. 25). Wings 



held horizontal at rest ... ....Monellia Oestlund 



