Pomona College Journ.vl ok Entomology 759 



5. Nectaries as long as one-fourth the length of the body, or more, 



and swollen in the middle. Drepanosiphum 



Nectaries large and nearly one-fourth tiie length of the body, 



swollen at the base and tapering toward the middle. Drvpanaphis 



6. ypur of si.xth antennal segment longer than the segment. Calapkis 

 Spur of sixth segment not longer than segment. Euceraphis 



7. Antennte longer than the body, spur of the sixth segment long, 



and about the same length as the segment. 8 



Antenna; shorter than the body, spur very short, often being little 



more than a nail-like process, segment sliort. 9 



8. Antenna; witli spur at least as long as sixth segment, and with little 



or no antennal tubercles. Nectaries twice as long as broad and 

 constricted in the middle. Myzocallis 



Antennai with spur shorter than sixth segment, nectaries much 



broadened at base. Eucallipterus 



9. Antennal spur less than one-half the length of the sixth segment, 



nectaries not longer than broad at base, constricted in the mid- 

 dle. Chromaphis 



Antennal spur at least half as long as the sixth segment, nectaries 



short, about as long as broad and placed on a broad base. Callipterus 

 10. Antennaj situated on distinct tubercles and much longer than the 

 body, nectaries but pores with raised edges, spur of sixth seg- 

 ment long and tapering. Monaphis 



Antenna; not on tubercles and scarcely longer than the body, nec- 

 taries reduced to pores, spur of the sixth joint nearly as long as 

 the joint. Monellia 



DREPANOSIPHUM Koch, 1855 

 Type Aphis platanoides Schrank 



Ayitennae — On distinct frontal tubercles which are elevated on the inner 

 side, exceedingly long, first article gibbous on the inner side, third segment 

 longest, spur of the sixth segment much longer than tiie ba.se (Wilson gives six 

 times as long). 



Boatrum — Short, last segment long. 



Legs — Moderately long. 



Wings — Long and slender. 



Curniclcs — Long, one-fourth the length of the bod.y, dilated at the base 

 and middle. 



^'fy/e— "One-f(iui'th the length of the nectaries, oblong and globular at 

 the tip ; base broad, tapering to a constriction at the connection with the base." 



Anal plate — "Broad and slightly emarginated." 



D. platanoides (Schrank). On the European Sycamore (Platanus orien- 

 talis). Collected in the vicinity of Stanford University, I'alto Alto, California, 

 by W. M. Davidson. Jr. Ec. Ent. Ill, 377, 1910. 



