SYNOPTICAL KEY TO THE APHIDIDAE OF MINNESOTA 133 
based on the swollen, knob-like apex of the cornicles, tho the sensilla 
show Macrosiphea characters. 
(69) EPAMEIBAPHIS FRIGIDAE (Oestiund) 
Found on Artemisia frigida. 
62. Series LACHNEA=-MACROSIPHEA. Traced from a com- 
mon stock with Lachnea and the series Lachnea-Aphidea, we have two 
other supertribes that have evolved alongside the Aphidea line. 
The body is usually large and pointed posteriorly ; antennae usually 
longer than the body, with very long spur, and provided with apically 
enlarged sensilla and hairs on the antennae and other parts of the 
body. The two supertribes of the series may be separated as follows : 
a. The glandular apex of the sensilla globate; cornicles short and truncate... 
Supertribe CALLIPTEREA 63 
b. The glandular apex of the sensilla flattened and spearlike ; cornicles usually 
lonewands cylindiacals ten ao set cree oi Supertribe MACROSIPHEA 83 
63. Supertribe CALLIPTEREA.  Sensilla on the antennae and 
on the body, especially in larval forms, glandular and ending in glob- 
ular apices ; cornicles short and truncate, usually not longer than broad ; 
cauda usually ending in an enlarged or globate apex. The supertribe 
differs from the rest of the family in being sporadic and not gregari- 
ous, never found in large colonies, and in the fact that the_partheno- 
genetic generations all acquire wings before reproducing. The follow- 
ing tribes are represented in Minnesota : 
a. Large and Macrosiphum-like, front strongly emargineted................ 
Tribe CALAPHIDINI 64 
b. Medium to small, front not strongly emarginated; cauda globate.......... 
Tribe CALELIPTERINI- 68 
Ge Conmiciess longer tharmproad widest at Das o.i2 (2 a: Laie enw oe aegis aivyallags 
Tribe DREPANOSIPHINI 81 
64. Tribe CALAPHIDINI. Size large and front strongly emar- 
ginated as in the Macrosiphini; cornicles usually somewhat longer than 
broad and cylindrical, sometimes swollen at base. Body and appen- 
dages often with pulverulence or wax threads. Three genera are 
recognized : 
a. Spur shorter than the very long base; stigmal vein distinct; cornicles 
swollen or bulged at base.. Genus QUIPPELACHNUS 65 
b. Spur shorter than the base; stigmal vein distinct; cornicles cylindrical..... 
Genus EUCERAPHIS 66 
c. Spur longer than the base; stigmal vein indistinct on besal half or more; 
cornicles; eylitidrical iec.. veces ehi een =< Genus CALLIPTERINELLA 67 
