Feb., '07] ENTOMOLOGICAL NEWS. 51 



deeply sinuate at apex ; carinated on the under side from its base to the 

 apex of the fifth segment ; second male genital segment four times as 

 long as first, sinuate at apex. Length, <^ 11.5 mm. 



Demerara (R. J. Crew). 



Akin to D. hirticornis Champ., but it is larger ; the frontal 

 spines are not divergent ; the first antennal joint is much 

 shorter ; the lateral angles of the pronotum are more acute 

 and prominent, and the last dorsal segment of the male is dif- 

 ferently shaped. 



This is the insect referred to by Van Duzee in Trans. Amer. 

 Ent. Soc., 1901, p. 350, as Narvesus sp. 



N. B. The allied Australian genus Agylla Stal must bear 

 the later name Thelocoris Mayr, the first name being pre- 

 occupied (Walker, Lepidoptera, 1854). 



The Bees of Nebraska. I. 



FAMILY PANURGID.E. 



Genus PERDITA F. Smith. 



BY MYRON H. SWENK AND T. D. A. COCKERELL. 



1. Perdita albipennis Cresson. 



This species is present over the entire State, specimens from 

 Sioux County, Bridgeport, Haigler, Spring-view, Cams, West 

 Point, Lincoln and Nebraska City having been examined. It 

 flics from June 23 to September 14, visiting abundantly the 

 flowers of Helianthns annuus and allied species, but is to be 

 found on Solidago, Grindelia and Rndbeckia also. 



2. Perdita lacteipennis n. sp. 



$. Length, 9-10 mm. Head and thorax blue-green, the former ele- 

 ment predominating on head and metathorax, the latter on mesothorax, 

 which has also an aeneous tinge. Ends, of mandibles, a narrow cuneate 

 mark in the middle of the otherwise unmarked, shiny and sparsely 

 punctured clypeus, a quadrate mark on each side of the face between 

 the clypeus and the eye, a line on .scape in front, a line on prothorax, 

 a very large spot on tubercles, all of the knees and a broad stripe down 

 the front of anterior tibise, yellow. Flagellum reddish testaceous 

 beneath. Wings milky white, nervures and stigma pallid. Teguhe 

 pale. Abdomen black, the first segment with a large spot on each 

 side, segments 2-5 crossed by very broad yellow bands, the first two 

 sub-basal, oblique, and strongly notched on the posterior margin (some- 

 times completely narrowly interrupted), the last two submedian, trans- 



