512 FIFTH REPORT OF THE ENTOMOLOGICAL COMMISSION. 



91. The variable leaf-hoppek. 



Athysanus variabilis Fitch. 



Order Hemiptera ; family Cercopid^. 



Puncturing the leaves and succulent shoots and extracting their juices, from the 

 middle of June till the middle of July, an oblong oval leaf-hopper of a sulphur yellow 

 color, its wing-covers commonly with an oblique black stripe, their tips hyaline; 

 its thorax and scutel often tawny yellow or black ; its length 0.20. (Fitch.) 



This insect may every year be met with in numbers upon birch trees 

 and also upon alders. It was once found literally swarming upon a 

 white birch standing apart from other trees. (Fitch.) 



92. The smaller leaf-hopper. 



Athysanus minor Fitch. 



From the middle of June till the middle of August, a similar leaf-hopper to the pre- 

 ceding, but of a cinnamon color, including its face, and having a colorless hyaline 

 spot on the middle of its wing-covers and a larger one on their tips; its length 0.18 

 to 0.20. (Fitch.) 



93. The windowed leaf-hopper. 



Athysanus feneslratus Fitch. 



From the middle of June till the last of July, a leaf-hopper resembling the forego- 

 ing species, but with blackish wing-covers with similar hyaline spots and a small 

 third one placed on the middle of the inner margin, and its forehead black with 

 pale yellow band between its eyes; its length 0.20 inch. (Fitch.) 



94. Athysanus ahietis Fitch. 



Order Hemiptera ; family Tettigoniid^. 



Puncturing their leaves and extracting their juices the latter part of May autl 

 during the month of June, an oblong black shining leaf-hopper 0.20 long, tapering 

 posteriorly, and broadest across the base of the thorax, with a light-yellow head, 

 having the mouth black and also two bauds upon the crown, the ends of which are 

 often united, and commonly with a white streak on the middle of the inner edge of 

 the wing-covers, its legs being pale yellowish varied more or less with black. 



"I first met with several specimens of this insect eleven years since, 

 upon the black spruce and fir balsam, on the summit of the Green 

 Mountains, in an excursion hither with that martyr of science, the late 

 Prof. C. B. Adams. Since then I have repeatedly captured this same 

 insect upon birch trees, distant from any spruces, and it is possible it 

 might have been accidentally present on these latter trees in the instance 

 first mentioned, there being numerous birch trees in the same vicinity." 

 (Fitch.) 



95. Enchenopa binotata Say. 



The following note is by Mrs. Dimmock (Psyche, iv, p. 241) : 



Enchenopa binotata Say (Appendix Long's Exped., 1824, p. 301, 302). Common on 

 twigs of Betula alba. Riley (Amer. Eutom , Aug., 1869, v. 1, p. 248) says its favorite 

 home is Ptelea trifolium, but gives grape (vitis) and red-bud (Cercis) as food-plants. 

 Its age is described in Amer. Entom., Oct., 1880, v. 3, p. 254. Liutner (Ist Ann. Rept. 

 State Entom., N. Y., 1882, p. 281-288) gives an excellent general account of imago 

 and eggs, both of which are figured. As food-plants he adds Celastrus scandens and, 

 upon the authority of others, Juglans and Robinia. 



