124 PSTCHE . [Xoveiiibei--December iSSS 



common on tliedog-vvood inMinnesotn.* Head black, with frontal and post- 



Whether the specimens described below ocular tubercles well developed. Pro- 



belono- to Fitch's species or not I can thorax l:)lack with prominent lateral 



only conjecture, but as it is the only tubercles. Meso- and metathorax 



Aphis I have found upon this plant I black, somewhat shining. Abdomen 



refer it to this species. gieen with a row of marginal sub- 



My attention was first called to this circidar black spots, two transverse 



insect by finding the winged vivipa- spots of same color on dorsum in front 



rous females establishing colonies of of cauda, and a similar quadrangular 



sexed ir.dividuals on the leaves of dog- spot at anus, anil just in front of it on 



wood about the middle of October. ventrum ; also occasional small scat- 



The insects had evidently migrated to tered spots on both surfaces. Anteiior 



the shrubs under observation either legs dull yellowish-brown, with coxae, 



from other shrubs of the same kind or articulations of femora and tibiae, tips 



from some other kind of plant for there of tibiae, and tarsi, dusky. Middle and 



were no indications of their having de- posterior legs same, except that femora 



veloped where they were found. They are more or less dusky throughout, 



occurred at the same time and in the Cornicles long, blackish, cylindrical, 



sames ituations as Schi zoneura coriii Cauda dark yellowish-brown. Tegulae 



cola. In fact the autumn life-history greenish-brown. Insertion of wings 



of the two species seems to be identi- yellowish. Costal nervure blackish, 



cal, except that the males of the latter Cubitus light yellow. Stigma blackish. 



are apterous while those of the former Posterior nervures brown. Antennae 



have wings. The eggs of the two long and slender. Joints I and II short, 



species are laid in the same situations subequal ; III nearly as long as IV -|- 



and are indistinguishable. Fully de- V, and slightly longer than VII; pores 



veloped males and females were ob- distinct : IV and V subequal ; VI 



served 24 October when some of the shorter than any except I and II ; VII 



latter were ovipositing on the twigs ; a little shorter than III. Rostrum yel- 



and all three forms were taken as late lowish-brown, reaching second coxae, 



as 10 November. Described from six specimens taken 



Win<red viviparous female {"pse/i- 24 October 1SS7, on under side of leaves 



dogy)ia pupiferaf) . of Corin/s sangiiinea and C. sericea., 



Wino- expanse .... 6.40 mtn. with colonies of young of the ovipar- 



Width of body 68 mm. ous form about them. 



Length of body .... 1.S3 mm. Winged male. 

 " " antennae . . 1.41 nun. 



" " cornicles . . .23 mm. Wing expanse 5.00mm. 



" " Cauda it mm. Width across thorax. . . 0.44 mm. 



'■ Length of body .... 1.60 mm. 



* Fourteenth Rept. State geol. Minn., p. 47. " " antennae . . I.20mm. 



t Lichtenstein, "Les pucerons. Monogr.aphie des " " COrnicles . . .I4nim. 



aphidiens," p. 150. " " Cauda . . . .lomm. 



