691 



CusHMAN (R. A.). Descriptions of New Ichneumonidae and Taxonomic 

 notes.— P;oc. Entom. Soc. Washington, Washington, D.C., xvii, 

 no. 3, September 1915, pp. 132-142. 



The following species of ecouomic importance are described and 

 recorded : Calliephialtes thurheriae, sp. n., reared from larvae of 

 Anthonomus grandis thurberiae, Pierce, obtained in bolls of Thurbsria 

 thespesiodes, collected on 12tli April 1913 ; Calliephialtes grapholithae, 

 Cress. (C. xanthothorax, Ashm.) ; Homaspis nigripes, sp. n. ; Notopygus 

 scuteUafus, sp. n. ; Trematopygus caliroae, Viereck ; T. eriocampoididis, 

 sp. n., reared from Eriocampoides limaeina, L. {cerasi, L'.), taken on 

 26tli August and oth September 1914 on cherry trees badly infested 

 by the pear slug ; Omorgus tortricidis, sp. n., and 0. ferrugineipes, 

 Ashm., both bred from Polychrosis viteana ; 0. phthorimaeae, sp. n., 

 reared from Phthoriniaea opercvlella ; Xenoschesis slossonae, sp. n. ; 

 X. gracilis, sp. n. ; Bassus carpoeapsae, Cush., reared from Cydia 

 pomonella. 



Crawford (J. C). The Genus Secodella in North America.— Proc. 



Entom. Soc. Washington, Washington, B.C., xvii, no. 3, September 

 1915, pp. 142-144. 



The following new species of Chalcids are described : Secodella 

 cushmani, sp. n., reared from Polychrosis viteana ; S. acrobasis, sp. n., 

 reared from Mineola (Acrobasis) indiginella var. nebidella ; S. rugosus, 

 sp. n., and ;S. viridis, sp. n. 



Walton (W. R.). A new nocturnal Species of Tachinidae. — Prcc. 

 Entom. Soc. Washington, Washington, B.C., xv'ii, no. 3, September 

 1915, pp. 162-164, 3 figs. 



Neophyto nocturnalis, sp. n., collected at Forest Glen, Md., is 

 described. This species is probably parasitic upon noctmiial Coleoptera, 

 possibly Lachnosterna. 



Shafer (G. D.). How Contact Insecticides kill. Part Z.— Michigan 

 Agric. Coll. Expt. Sta., Biv. Entom., East Lansing, Technical Bull, 

 no, 21, Julv 1915, 67 pp., 3 figs., 1 plate, 7 tables. [Received 

 27th September 1915.] 



Contact insecticides become effective in one or both of the following 

 ways:' — (1) Through conditions connected only with proximity ^\^th 

 the external integument or with the invaginations of the body wall 

 (tracheae and hind-gut) ; (2) through effects brought about after a 

 possible absorption into the body tissues. 



Alkaline washes, corrosive sublimate solution, etc., are capable of 

 penetrating the chitin. Penetration of gases, especially through the 

 tracheae, is more rapid than that of liquids. The gases act on the 



(C215) k2 



