36 Thomas Albert Williams 



III-V with a few small sensoria; VII longer than III. Eyes red. Beak 

 reaching middle coxae. Head and thorax dark brown to black. Pro- 

 thorax brownish, with small lateral tubercles. Wings with yellowish inser- 

 tions, subcostal and stigma, the latter rather short and broad, somewhat 

 pointed; veins slender, blackish; second branch of cubital nearer the first 

 than to apex of wing. Abdomen greenish brown, with darker transverse 

 markings. Legs pale, with dusky joints and tarsi. Honey tubes short 

 (0.10 mm.), subclavate, black. Tail about as long as honey tubes, acutely 

 conical, whitish. Anal plates blackish. Length of body about 2.15 mm., 

 to tip of wings 3.60 mm. 



On under side of snowberry {Symphoricarpus racemosus var. 

 pauciflorus) and Indian currant (S. vulgaris). Elmwood, Ash- 

 land, Belmont, War Bonnet Canyon. More common than A. 

 symphoricarpi Thomas. It causes the leaves to curl as does that 

 species. My specimens differ somewhat from Oestlund's descrip- 

 tion, but I am sure it is his species. The stigma can not be said 

 to be long, however. The white markings distinguish it very 

 readily from Thomas's species. 



Specimens in collection of the University of Nebraska (nos. 50, 

 51) and of the U. S. National Museum (no. 54). 



41. Aphis annuae Oestlund. 



Oestlund, List Aph. Minn., p. 43 (1886). 

 Oestlund, Syn. Aph. Minn., p. 66 (1887). 



Apterous viviparous female: Very dark green. Antennae shorter than 

 body, dusky. Abdomen short and broad. Honey tubes about twice the 

 tarsi, black, or with pale base. Tail short and conical. 



Winged viviparous female: Head and thorax shining black; the former 

 pointed in front. Antennae shorter than body, on very inconspicuous 

 tubercles, black; VII longer than III. Prothorax without lateral tuber- 

 cles, black. Wings long and narrow; second branch of cubitus much 

 nearer the apex of the wing than to the first branch. Abdomen dull 

 green, generally with a marginal row of black spots. Legs pale to dusky. 

 Honey tubes about twice the tarsi, black. Tail cylindrical, about half the 

 honey tubes, black. Length of body about 2 mm., to tip of wings about 

 3.50 mm. 



On leaves, sheaths and stems of bluegrass (Poa compressa). 

 Ashland, September to October, 1890. I think the insects are 

 generally lighter colored earlier in the season. 



120 



