THE CANADIAN ENTOMOLOGIST 229 



Antennae reaching to or beyond tip of abdomen; segment III with 4 to 8, 

 usually 5, round sensoria, and segments V and VI with the usual ones; filament 

 of VI quite long, being more than half longer than III and seven times the 

 length of VI base (fig. 2a). Beak reaching almost to coxa? of third pair of legs. 

 Cornicles (fig. 2b) of moderate length, being approximately half the length of 

 antennal segment III, cylindrical, and flaring at the tip. Cauda (fig. 2c) broadly 

 rounded and scarcely visible. Wing veins dark brown, the second branch of 

 discoidal branching about V2 the distance from tip to where first branches, 



C 



Fig. 27. — Aphis rociadx Ckll. A, antenna; B, cornicle; and C, cauda, of winged viviparous female. 



Wingless viviparous female: Entire body very dark shining brown, ap- 

 parently black, excepting posterior end of abdomen which is of a slightly lighter 

 brown. Antennae apparently black excepting segment III, which is brownish. 

 Legs as in winged female. Cornicles pale brown and black at tip. Cauda not 

 apparent. 



The antennae similar to those of the winged female, except that they lack 

 sensoria on segment III. Cornicles moderately short and cauda not exposed, 

 but visible as a broadly rounded organ through the transparent body wall 

 when mounted in balsam. 



Since writing the above I have received from J. R. Parker sexes of what 

 I believe may be this species, collected in Montana on larkspur. The males 

 are winged and the noticeable differences from the winged viviparous female 

 are as follows: Antennal segment VI, filament longer than III, but not one-half 

 longer; segment III with 60 or 70 small, somewhat tuberculate sensoria, irregu- 

 larly placed; IV with 12 or 15, and V with 10 similar sensoria; cornicles less 

 prominent, being paler and less conspicuously shaped. The apterous oviparous 

 female differs from the apterous viviparous as follows: Antennal segment VI 

 filament, longer than III but not one-half longer; segment III with 15 to 20 

 small sensoria, irregularly placed on basal two-thirds; antennal hairs longer; 

 cornicles as in male; and basal third of hind tibia swollen and bearing numbers 

 of small inconspicuous sensoria. 



Aphis cuscutae, n. sp. 



This typical aphis which appears to be undescribed, was collected by P. H. 

 Timberlake at Kaysville, Utah, on dodder (Cuscuta epithymum) growing on 

 alfalfa. Live specimens were received from Timberlake Oct. 21 and Nov. 10, 

 1914, from which the following descriptions are made. 



It might be noted here that from this live material we reared (Lysiphlebns) 

 Aphidius testaceipes Cress, (Gahan det.) and a syrphid {Syrphus opinator O. S., 

 Aldrich det.). 



