24S 



fulvous; auleniKu pale; connexivum and narrow margin of the ventral seg- 

 ments and pleural pieces whitish. Elytra fuliginous; forks of the first and 

 second sectors nearly equal; nervures sparingly punctate; pale at base. 

 Legs pale, femora and outer face of the tibia; more or less embrowned, 

 Pygofers broad, aperture transverse, narrowed dorsally, ventral notch 

 broad, moderately deep ; stiles rather slender, acute, very widely divergent, 

 almost horizontal ; the pygofers edged with white. 



In the brachypterous males the disc of the scutellum is sometimes pale 

 and the pale markings on the abdomen are more extended. 



The brachypterous females are pale brownish yellow, deeper colored 

 on the scutellum and venter; pronotum whitish; tergum and venter some- 

 times marked with black. 



This insect is apparently indigenous to all the northern countries of the 

 globe. It is found throughout Europe, extending its range in the north 

 from Scandinavia through Russia and Siberia to Kamshatcha, and on this 

 continent has been reported from Alaska, British America, Canada and the 

 Eastern United States generally. About Buffalo it is our most abundant 

 Delphacid, occurring through the entire season, frequently in large numbers 



Delphax arvensis Fitch is probably only the female of this species 

 Delphax furcata Prov. seems to differ in being larger and having a black 

 oviduct. It may be distinct. A few references for these names follow: 



LIBURNIA AVENSIS, (Fitch.) 

 Delphax arvensis, Fitch, Homop. N. Y. State Cab., p. 46, 1S51. 

 Reprint in Lintner's gth Rept, p. 386, 1893. 

 It seems impossible to positively identify this form. Several examples 

 of what I formerly placed under arvensis have been taken about Buffalo 

 from May to Oct. These I now believe to be the macropterous females of 

 pellucida. They are of a pale soiled yellow color, the elytra are tinged with 

 fulvous with strong fulvous nervures. In some examples there are a few 

 black marks beneath and the front may be more or less obscured. 



LIBURNIA FURCATA, (Prov.) 

 Delphax furcata, Prov. Nat. Canadien, IV, p. 320, 1872. 

 Prov. Pet. Faune Ent du Can., Ill, p. 225, 1889. 

 Van Duxee, Bui. Buf. Soc. Nat. Sci., V, p. 191, 1894. 

 A larger form closely allied to the preceding I placed under this name 

 in my list f^f the Hemiptera of Buffalo. It agrees with Provancher's 

 description in the size but wants the brown oviduct. This name should, 

 perhaps, be placed as a synonym of the foregoing. 



LIBURNIA DETECTA, n. sp. 



Macropterous form: Broad and stout Color soiled whitish; basal 

 angles of the scutellum and beneath, especially in the female, quite strongly 

 tinged with yellow. Face black; a longitudinal line in the middle of each 



