I'OIIOXA CoI.I.KdK JotKN Al. 1>K K.VTOMOUVJY "HI 



EUCERAPHIS W alkcr. 1S70 

 r\])c Aphis betulae I,iiinaiiis 



Body — Long, fon-hcnd narrow. 



Antetiuaf — Much longer than the lioiiy, nearly one ami one-half times as 

 long, situated on large, slightly gihhous antennal tuhereles, artiele I gihlious 

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

 cluding both the spur and the hasci, spur of article VI slender and slightly 

 shorter than the ha.se. 



Wings — Long. 



Coniiclfs — Short, hut slightly longer than hroad, somewhat tapenin;. .nii 

 stricted in the middle, ends ol)li<|ue to the main axes. 



Sii/h — Distinctly knohhed, constricted between the ha.se ami the knoli, 

 hase tapering, longer than the cornicles. 



Anal plati- — Rounded, without middle euuirgination. 



No species of this genus represented in California to date. 



MYZOCALLIS I'asscrini. I8<.0 

 PTEROCALLIS Passcrini. 18/0 

 Syns. CALLIPTEROIDES M.inhvilko, 18<14 

 TUBERCULATUS M..nlwilk<., 18'>4 

 SUBCALLIPTERUS Mnnlwilko, 18'M 

 ? THERIOAPHIS W alker, 1870 



Txpc Aphis coryli ( "mctze 



Body — Prothora.x and body elongated, forehead with extended frontal 

 ocelli giving it a pointed ciTect. 



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

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



Wings — Long and slender. 



Cornicles — Ta(iering from the base, nearly as broad a.s long, often con- 

 stricted near the middle. 



Style — Globular, with narrow constricted base. 



Anal plait — Deeply emarginated so as to be strongly bi-lobed. 



Key to California Species 



1. Spur of antennal article \'l not longer than the ba.se. 2 

 Spur of antennal article VI distinctly longer than the base. 4 



2. Antenna' longer than the body. ulmifolii 

 Antenna- not longer than the body, but may be a.s long. .'} 



3. Antcunu' \i.sually ius l/mg as the Ixxly. apices of articles Ill-V only. 



dark. i/ufn us 



Antenna- seldom as long as tin- body, apices of articles II1-\'I dark. alnt 



4. Antenna- shorter than the body. coryli 

 Antenna- ivs long or lunger tlian the body. 5 



