4i6 SCIENCE PROGRESS 



Gatenby (Quart. Jour. Micro. Set. vol. lxii. August 17) is a 

 well-illustrated account of these little-known bodies as they 

 occur in Lepidoptera, with particular reference to Smerinthus 

 populi and Pieris brassicce, and sets forth several interesting 

 results. The micromitosome is very probably present in the 

 primordial germ-cell, for it has been traced back with certainty 

 as far as the secondary spermatocyte, and is also found in the 

 female cell. It apparently divides in all cell divisions. The 

 mitochondria are at first similar in the male and female cells, 

 but they meet with a different fate subsequently in the male. 

 Here the mitochondral body is remarkable for the formation of 

 chromophobe and chromophile zones, whose purport is fully 

 discussed. Various remarkable changes in the macromitosome 

 of the sperm are recorded. Acroblasts have been demonstrated 

 in early growth stages of the spermatocyte, and an account given 

 of the complex changes that they undergo during the various 

 mitoses as well as their probable origin. The centrosome in 

 the early spermatid divides into two, and, as far as the available 

 evidence goes, one of them appears to be lost. 



The same author, writing on a similar theme, describes " The 

 Degenerate (Apyreme) Sperm-formation of Moths as an Index 

 to the Inter-relationship of the Various Bodies of the Sperma- 

 tozoon " (ibid.). 



Other papers include : " New Heterocera from Dutch 

 New Guinea " and "New Races and Aberrations of Heliconius " 

 (Ann. and Mag. Nat. Hist. July 17), and "New Lepidoptera 

 from Waigen, Dutch New Guinea, and Biak " and " Two New 

 Species and New Genus of Sphingidce " (ibid. September 17), all 

 by Joicey ; " Descriptions of New Pyralidae of the Sub-families 

 Hydrocampince, Scopariance," by Hampson (ibid.) ; " New 

 Geometridse in the Joicey Collection," by Prout (ibid. July 17) ; 

 New Indo-Malayan Species of Lepidoptera," by Swinhoe 

 (ibid. August 17) ; " Some Remarkable Melanic Aberrations 

 among the Aerceince in the Millar Collection of Butterflies of the 

 Durban Museum," by Barker (Ann. of the Durban Mus. vol. i. 

 July 17); "Some apparently Undescribed South African 

 Heterocera," by Janse (ibid.). 



Note on the Sub-genus Paradownesia Gestro," by Maulik 

 (Ann. and Mag. of Nat. Hist. July 17) ; "A Systematic Revision 

 of the African Species of the Coleopterous Family Erotylidce," 

 by Arrow (ibid. August 17); " Descriptions of some Ethiopian 



