Pomona C'oi-lege Journal of Entomoixjgy 761 



EUCERAPHIS Walker, 1870 

 Type Aphis betulae Linnaeus 



Hodjj — Lon^, forehead narrow. 



Antevnae — Mueh longer than the body, nearly one and one-half times as 

 long, situated on large, slightly gibbous antennal tubereles, artiele 1 gibbous 

 on the inner margin, article III four or five times as long as artiele VI (in- 

 cluding both the si)ur and the base), spur of artiele VI slender and slightly 

 shorter than the base. 



Wings — Long. 



Cornicles — Short, but slightly longer than broad, somewhat tapering, con- 

 stricted in the middle, ends oblique to the main axes. 



Style — Distinctly knobbed, constricted between the base and the knob, 

 base tapering, longer than the cornicles. 



Anal plate — Rounded, without middle emargination. 



No species of this genus represented in California to date. 



MYZOCALLIS Passerini, 1860 

 PTEROCALLIS Passerini, 1860 

 Syns. CALLIPTEROIDES Mordwilko, 1894 

 TUBERCULATUS Mordwilko. 1894 

 SUBCALLIPTERUS Mordwilko, 1894 

 ? THERIOAPHIS Walker, 1870 



Type Aphis coryli Goetze 



Body — Prothorax and body elongated, forehead with extended frontal 

 ocelli giving it a pointed effect. 



Antennae — As long, nearly as long, or longer than the body, not on 

 frontal tubercles, spur of article VI not more than twice as long as the base. 



Wings — Long and slender. 



Cornicles — Tapering from the base, nearly as broad as long, often con- 

 stricted near the middle. 



Style — Globular, with narrow constricted base. 



Anal plate — Deeply eniarginated so as to be strongly bi-lobed. 



Key to California Species 



1. Spur of antennal article VI not longer than the ba.se. 2 

 Spur of antennal article VI distinctl.y longer than the base. 4 



2. Antenna' longer than the body. ulmifolii 

 Antenna' not longer than the bod.v. but may be as long. 3 



3. AntennsB usually as 1/ing as the body, apices of articles III-V only, 



dark. quercus 



Antennafi seldom as long as the bod.v, apices of articles III-VI dark. alni 



4. Antenna; shorter than the body. coryli 

 Antenna' as long or longer than the body. 5 



