THE CANADIAN ENTOMOLOGIST. 131 



Hab. — Boulder, Colorado, at flowers of Ribes pumilum, April 17, 

 1 90S. (Glenn M.Hite.) 



The following key separates several males from Colorado, in which 

 the small joints of the middle tarsi are thickened : 



Hair of cheeks and sides of metathorax entirely pale ; insect 



steel-blue 0- universitatis, Ckll. 



Hair of cheeks and sides of metathorax at least largely black . . ..... 1. 



1. Abdomen beyond first segment very dark purplish, the tint (except on 



the hind margins) reddish rather than bluish ; second and third joints 



of middle tarsus obtuse on one side O. metitia, Ckll. 



Abdomen beyond first segment brilliant deep blue 2. 



2. Larger ; hind margins of abdominal segments concolorous with the rest ; 



second and third segments with a good deal of pale 



hair 0. integrella, Ckll. 



Smaller ; hind margins of abdominal segments violaceous ; abdomen 

 without green tints O. ama/a, Ckll. 



In O. integrella and 0. ama/a the basal nervure meets the transverso- 

 medial; in O. metitia it falls short of it. 



These insects show a distinct approach to the group which Robertson 

 named Centrosmia, and indicate that the latter can hardly stand as a genus. 



SOME RECENT WORK IN HEMIPTERA. 



BY J. R. DE LA TORRE BUENO, WHITE PLAINS, N. Y. 



Recently, by favour of the authors, I received three interesting papers 

 on the Hemiptera. The most important of these is by the learned Dr. E. 

 Bergroth, and is entitled " Enumeratio Pentatomidarum Post 

 Catalogum Bruxellensem Descriptarum," which appeared in the 

 "Annales de la Societe Entomologique de Belgique."* Of the other two, 

 one by C. W. Kershaw and G. W. Kirkaldy, " Oa the Metamorphoses of 

 two Hemiptera-Heteroptera from Southern China," appeared in the 

 Transactions of the Entomological Society of London, "f and the other by 

 the latter author, is " A Catalogue of the Hemiptera of Fiji," which 

 appeared in the to us little-known and out-of-the-way publication, " Pro- 

 ceedings of the Linnean Society of New South Wales."?; To all working 



*i9o8, Vol. XV, pagres 132-200. 



11908, pt. 1, pp. 59-62, pis. iv and v. 



§1908, Vol. XXXIII, pt. 2, pp. 345~39'i pi. iv, 



April, 1909 



