No. 34-] HEMIPTERA OF CONNECTICUT I APHIDIDAE. 289 



Cornicles much more than twice as long as the hind tarsi, much 



swollen in the middle and bright orange in color salicis 



5. Unguis of segment vi of antenna about equal in length to the 



cornicles and about twice as long as base bicolor 



Unguis of segment vi considerably shorter than the cornicles and 

 not twice as long as base populifoliae 



M. bicolor (Oestlund). Melanoxanthus bicolor Oestlund. (Fig. 

 26, 7-8.) 

 Aphid. Minn., 36, 1887. 

 M. flocculosum Weed. Melanoxanthus flocculosus Weed. (Fig. 

 26, 11-12.) 

 Ins. Life, iii, 291, 1891. 

 M. populifoliae (Fitch). Aphis populifoliae Fitch. (Fig. 26, 

 15-16.) 

 Homop. N. Y. St. Cab., 66, 1851. 

 M. medium (Baker). Pterocomma media Baker. (Fig. 26, 1-2.) 

 Jour. Econ. Ent., 10, 4431, 1917. 

 On poplar. 



Manchester, 3 Sept., 1909 (A. I. B.) ; on Carolina poplar. New Canaan, 

 21 Sept., 1909 (A. I. B.). 



M. salicis (Linnaeus). Aphis salicis Linnaeus. (Fig. 26, 13-14.) 



Syst. Nat., Edn. 10, 453, 1758. 

 M. smithiae (Monell). Chaitophorus smithiae Monell. (Fig. 

 26, 5-6.) 



Bull. U. S. Geol. Geog. Surv. Terr., v, 32, 1879. 



On poplar. 



New Canaan, 9 Oct., 1902; on willow, New Haven, 30 Aug., 1909 

 (A. L B.) ; on poplar, New Canaan, 19 Sept., 1910 (W. E. B.). 



No species of the genus Pterocomma has as yet been definitely 

 recorded from New England. 



Subtribe Saltusaphidina. 



Forms living usually on the foliage of sedges ; bodies elongate, 

 eyes without ocular tubercles ; legs often modified for leaping ; 

 sexes usually both apterous ; cornicles reduced ; antennae held out 

 in front of body. 



Key to Genera. 



Head considerably elongate; cornicles cup-shaped; legs modified 

 for leaping Saltusaphis, p. 289 



Head not much elongate ; cornicles mere rings ; legs not modified 



for leaping ; oviparous female with prominent wax glands 



Thripsaphis, p. 290 



Saltusaphis Theobald. 

 Cornicles truncate or cup-shaped; antennae of six segments, 



N. B. Melanoxantherium antennatum Patch is known only from the 

 oviparous female. 



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