174 THE CANADIAN ENTOMOLOGIST. 



Tavarcs, Brotcria, Lisboa, IV, p. 12, 1905. 



Sanderson, Bull 74, Del. Coll. Agri. Exp. Sta., pp. 130-13G, figs. 11-14, 

 1906. 



Theobald, Rcpt. Eco. Zool. 1907, p. 38, 1907. 



Quaintance, Circ. {>1, Bur. Ent., V. S. Dep. Agri., 1907. 



Grcviilius und Niessen, Coeln. Arbeiten der Rhcinischen Bauern-vereins, 

 fas. iii. No. 60, 1908. 



Theobald, Ins. and Allied Pests of Fruit, p. 133, 1908. 



(iillette and Tavlor, Bull. 133, Colo. Agri. Exp. Sta., p. 23, 1908, and Bull. 

 134, p. 11, 1908. 



(iillette, Journ. Eco. Ent. I, p. 303, pi. "), figs. 1-8, 1908. 



Lea, Ins. and Fung. Fests of Orchard and Farm, Tasmania, p. 64, 1908. 



Theobald, Kept. Eco. Zool., 1908, p. 50. 1909. 



Carpenter, Eco. Proc. R. Soc. Dublin, II, pt. 2, p. 12, 1910. 



Theobald, Kept. Eco. Zool. 1910, p. 35, 1911. 



Theobald, Rcpt. Eco. '/^ool. 1911, p. 34, 1912. 



I uligren, Cpp Prak Ent. XXII, p. 65 (ponii), 1913. 



Carpenter, Eco. Pro. R. Dublin Soc. II, No. 6 (ponii and sorbi), 1913 



Theobald, Bull. Ent. Res. IV, p. 323, 1914. 



Patch, Bull. 233, Maine Agri. Exp. Sta., p. 267, 1914. 



Note. — Oestlund sa\ s Dr. Fitch's Aphis malifolice appears to 

 be a variety of Aphis mali Fabricius, Schonteden, etc., and thinks 

 it is the same as Aphis pomi De Geer; that is mali of Fabricius. 

 I think it may be hockii; it is certainly not pomi. 



Dksckiption: 



Alate viviparous female. 



Head and thorax l)lack. Abdomen green; cornicles straight, 

 black, imbricated. Antenna' shorter than body; 3rd segment with 

 G-10 sensoria; 4th with 2-4 sensoria; 3rd longer than 4th, 4th 

 longer than oth, 3rd to 6th imbricated. Cauda black, blunt, with 

 4 to 5 pairs of lateral hairs. On the green abdomen are four pairs 

 of lateral black spots, and from each arises a blunt projecting 

 tubercle, and another is present on the segment carrying the 

 cornicles, smaller than the preceding but marked; the 7th and 

 8th segments may have blackish median basal patches. Legs 

 green; apices of femora and tibia? dark; tarsi dark. Wings with 

 yellowish-green insertions. Length 2.0 to 2.5 mm. 



Apterous viviparous female: 



Bright green to rich yellow green; cornicles markedh' black-, 

 slightly tapering, thick and rather. long. Cauda blackish to deep 

 brown. Antenna? not quite as long as the body; 3rd to 6th seg- 

 ments imbricated; 3rd longer than 4th, 4th very slighth' longer 



