46 SCIENCE PROGRESS 



and more active form with an average length of life of thirty- 

 four days, while P. capitis is smaller and averages only twenty- 

 seven days. 



Rennie has written " On the Biology and Economic Signifi- 

 cance of Tipula paludosa " (Ann. App. Biol. vol. hi. Jan. 191 7). 

 The larva of this fly, better known as " leather jacket," has 

 become of much importance in view of the necessity of preserv- 

 ing as much of the crops as possible. Under certain conditions 

 very serious damage has been caused by this larva, and the 

 present paper is an attempt to investigate not merely the life- 

 history of the fly, but also the conditions unfavourable to the 

 larva and those under which it will attack crops. Although 

 the experiments have been in progress for two years or so, no 

 definite preventive measures are proposed, but a very sound 

 foundation for further work is assured. 



Other papers include : " The Homoptera of Indo-China," 

 by Distant (Ann. and Mag. Nat. Hist. Jan. 191 7) ; " The Effect 

 of Long-continued Heterozygosis on a Variable Character in 

 Drosophila " l (J our. Exp. Zool. Feb. 191 7) ; " Notes on Exotic 

 Chloropidce," by Lamb (Ann. and Mag. Nat. Hist. Jan. 191 7) ; 

 " New Species of Tabanidce from Australia and the Fiji Island," 

 by Ricardo (ibid. Feb. 1917) ; " New Species of Hazmatopoda 

 from India," by Ricardo (ibid.) ; " Notes on Exotic Helomy- 

 zidce, Sciomyzidce, and Psilidce," by Lamb (ibid. March) ; 

 " On some New Mites of the Suborder Prostigmata living on 

 Lizards," by Hirst (ibid. Jan.) ; " Corylophidce [Coleoptera] 

 from the Seychelles and Rangoon," G. Scott (ibid.) ; " Some 

 Systematic Notes on Melolonthine Coleoptera," by Arrow 

 (ibid.) ; " Cassidincs and Bruchidaz [Coleoptera] from the 

 Seychelles Islands and Aldabra," by Maulik (ibid.) ; " Coleop- 

 tera, Heteromera (excluding Tenebrionidce) from the Seychelles 

 Islands and Aldabra," by Champion (ibid. Feb. 191 7) J " On 

 New Species of Indian Curculionidce , Part III." by Marshall 

 (ibid.) ; " Descriptions of New Pyralidce of the Sub-families 

 Epipaschiance, Chrysangince, Endotrichince and Pyralince," 

 by Hampson (ibid. Jan. 191 7) ; " Notes on Fossorial Hymenop- 

 tera : xxv. On New Sphecoidea in the British Museum, xxvi. On 

 the Genus Homonotus Dahlb.," by Turner (ibid.) ; " Descrip- 

 tions and Records of Bees, lxxiv." by Cockerell (ibid. March 

 191 7) : " Further Notes on the New Zealand Amphipod Hyale 



1 By Marshall and Muller. 



