406 Forty-sixth Report on the State Museum [66] 



Thobn-leaf Aphis, *A. cratrngifoUm. Black; abdomen green, with 

 a row of blackish dots along each side; nerves of the fore 

 wings whitish, black at their tips; tibia% except at their tips, 

 and base of the femurs, green; horns nearly half equalling the 

 tip of the abdomen. Length, 0-15. On the leaves of Cratmgus 

 punctata, corrugating them, No, 847, male. 



" BiRCH-iNHABiTiKG Aphls, *^1, hetuloiCoUns. Sulphur yellow; 

 antennjB deep black, two basal joints sulphur-yellow, the fol- 

 lowing joints Avhite at their bases; stigma pellucid yellowish; 

 nerves black, the costal and marginal sulphur-yellow, base of 

 the forked nerve hyaline; horns very short. Length, 18. 

 No, 848, male, 



'^ Maple-trke Aphis, A. aceris, (Linn,) Syst, Nat, ii, 736, Our 

 insect appears to correspond with the brief description given 

 of this species. Occurs on the Acer pennsyl'vanicum. No. 

 849, male. 



Elder-leaf Aphis, *^1, sambucifolioi. Black; tibia^ and base of the 

 femurs pallid; stigma dusky; nerves black, the furcate one 

 hyaline at its base. Length, 0-15. On the under side of the 

 leaves of the elder. No. 850, male. 



Pine-inhabiting Aphis, *^, pinicolens. Straw-yellow, densely 

 pruinose; antenna^ black, bases pallid, with a fuscous annulus; 

 fore wings with a fuscous spot on the apex of each nerve; 

 nerves brown, hyaline at their bases, the costal straw-yellow; 

 horns very short. Length, 0-25, Solitary on the pine. No. 

 851, male. 



"Poplar-leaf Aphis, *A. populifolke. Chestnut-brown, pruinose; 

 legs hairy, black, above the knees j^ale brown; stigma smoky 

 fulvous, margined with black; nerves brown; tergum with 

 two dorsal rows of impressed, quadrate, fuscous spots, and on 

 each side two rows of impressed dots; horns equalling a third 

 of the distance to the tip. Length, 0-22. On the leaves of 

 the Popuhis grandidentota. No. 852, male. 



*•' Cone-flower Aphis, *A. rudheck'uv. Red; antenna- and legs 

 black; basal half of the femurs pale yellow; horns equalling 

 the tip; stigma yellowish; nerves brown, the costal sulphur- 

 yellow. Length, 0-20. Infests the upper part of the stalks of 

 Rndheckla laciniata, Solidago serotina and S. gigantea. No. 

 853, male. 



