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Olsen (C. E.). Idiocerus cognatus, Fieber, established in North 

 America. — Jl. N. Y. Entom. Soc, Lancaster, Pa., xxvii, no. 2-3, 

 June-September 1919, pp. 126-128, 1 plate. 



Attention is drawn to the establishment of a species of Idiocerus 



on white poplar (Populus alba) in North America. Until further 



. comparisons have been made with European forihs, this leaf-hopper 



is provisionally identified as Idiocerus cognatus, Fieb. {distinguendus, 



Kirschb.). A description of the adults is given. 



DiCKERSON (E. L.) & Weiss (H. B.). Notes on the Early Stages and 

 Life History of Idiocerus cognatus, Fieb., in New Jersey. — Jl. 

 N.Y. Entom. Soc, Lancaster, Pa., xxvii, no. 2-3, June-September 

 1919, pp. 129-132. [Received 30th December 1919.] 



The eggs of Idiocerus cognatus, Fieb., which are generally deposited 

 singly during the middle or end of July under the bark of the new 

 growth and terminal twigs of Populus alba, hatch about the end of 

 May. The emerging nymphs are usually found on the upper surface 

 of the unfolding leaves, but moulting always takes place on the lower 

 leaf-surface. The nymphal stages, of which there are five, require 

 from 3 to 6 days each, making a total of about one month. The 

 adults appear towards the end of June and beginning of Jidy and 

 have been found as late as October. There is only one generation 

 a year. No appreciable damage is caused to the food-plant by the 

 feeding nymphs, but should they be very abundant a slight malforma- 

 tion and whitening due to the abstraction of sap is noticed on the 

 young leaves. The egg and nymphal stages are described. 



TiMBERLAKE (P. H.). Notes OH the North American Species of 

 Hippodamia (Coleoptera). — Jl. N.Y. Entom. Soc, Lancaster, Pa., 

 xxvii, no. 2-3, June-September 1919, pp. 162-174. 



The work of previous authors is reviewed and the synonymy of 

 these Coccinellids, as well as points of differentiation of thirteen species 

 of Hippodamia, are discussed. These include : Hippodamia parenthesis. 

 Say, H. convergens, Guer., and H. glacialis, F. 



NicoLAY (A. S.) & Weiss (H. B.). Additions and Corrections to 

 the Review of the Genus Buprestis in North America. — Jl. N.Y. 



Entom. Soc, Lancaster, Pa., xxvii, no. 2-3, June-September 1919, 

 p. 241. [Received 30th December 1919.] 



Buprestis viridisuturalis [R.A.E., A, vii, 157] has been found 

 breeding in cotton wood and alder. It occurs at less than 1,000 feet 

 elevation and in certain valleys in the interior at 4,500 feet. 



MusY (M.). Les Chenilles du Chou, leurs Ennemis et les Moyens 

 de les combattre. — Bidl. Soc. Fribourgeoise Sci. Nat., Fribourg, 

 xxiv, 1916-1918, pp. 120-122. 



Attention is drawn to the increased abundance of Pieris spp. on 

 cabbages in the vicinity of Fribourg, Switzerland ; this may probably 



