THE CANADIAN ENTOMOLOGIST 93 



life: legs, antennae and cornicles yellow, with tips of antennae and 

 tarsi black; cornicles yellow and nearly cylindrical, slightly taper- 

 ing and curved outward at the distal ends; .40 long, or fully as 

 long as joint VI of the antenna with its spur; length of antenna, 

 1.20; joint III without sensoria; cauda rather broad and spatula- 

 like; or pre-caudal tergite, a somewhat knobbed tubercle, fully 

 half as long as the cauda, projecting directly above it and bearing 

 two prominent hairs; antennae and legs sparsely set with short, 

 stout, blunt hairs that can hardly be said to be capitate; length 

 of body, 1.60. See figures. 



Described from specimens taken along with the alate vivi- 

 parous females at Geneva, N.Y. i 



Both alate and apterous forms, in every respect like those de- 

 scribed above, were taken at the same place and date on flower 

 heads of Heracleum species, and we have also taken it from celer\-. 

 Webster, Mass., 6, 19, 1909, so there can be little doubt but that 

 this species also alternates between the willows and umbelliferous 

 plants as in the cases of caprecE and essigi. 



Siphocoryne capreae (Fabricius). 



Aphis caprecE, Ent. Syst. Nat., IV, 221, Syst. Ent. 217; Syst. 

 Rhyng., p. 294, 1803. 



Kaltenbach, Monographic der Pflanzenlause, p. 109. 1843. 



Rhopalosiphum caprece, Koch, Die Pflanzenlause Aphiden, p. 37, 

 figs. 46-47, 1857 (not this species). 



Rhopalosiphum cicntce, Koch, Die Pflanzenlause, p. 24, 1857. 



Rhopalosiphum paslinacce, Koch, Die Pflanzenlause Aphiden, p. 

 41, figs. 52-54, 1857. 



SiphocoryncB caprece, Passerini, Gli Afidi, 1860. 



SiphocoryncB pastinaccE, Buckton, British Aphides, Vol. II, p. 24, 

 1879. 



• 



Rhopalosiphum salicis, Monell, Bull. 5, U. S. Geol. Surv., p. 26, 

 1879. 

 Thomas, 8th Report St. Ent. Ill, p. 194, 1879. 



Siphocoryne salicis, Weed, Trans. Am. Ent. Soc, vol. XX, p. 297, 

 1893. 



