120 SCIENCE PROGRESS 



Coccidse : I. On Aphelinus mytilaspides, Le Baron, a Chalcid 

 Parasite of the Mussel Scale (Lepidosaphes ulmi L.)." It is the 

 principal parasite of the mussel scale, but although it has two 

 generations a year, its limited power of migration and low 

 fecundity render it less effective than an insecticide. Butter- 

 flies and moths are treated in Joicey's " New Lepidoptera from 

 Dutch New Guinea " {Ann. and Mag. Nat. Hist. No. 97, January 

 1 91 6), and Hampson and others on a collection of moths made 

 in Somaliland by W. Feather (Proc. Zool. Soc. February 191 6). 

 Turner continues his " Notes on Fossorial Hymenoptera : XIX. 

 On new Species from Australia " (Ann. and Mag. Nat. Hist. 

 No. 97, January 1916), XX. " On some Larrinse in the British 

 Museum " (ibid. No. 99, March 1916), and also describes " Two 

 new Species of the Hymenopterous Genus Megalyra Westw." 

 (ibid.). Edwards writes " On the Systematic Position of the 

 Genus Mycetobia Mg." (ibid. No. 97, January 1916), and Jack- 

 son " On the Nomenclature and Identity of some little-known 

 British Spiders " (ibid. No. 98, February 191 6). New forms 

 are recorded by Townsend, " Two New Genera of African Mus- 

 coidea " (ibid.), and Bagnall, "Brief Descriptions of new 

 Thysanoptera : VII." (ibid. No. 99, March 1916). Evidence 

 indicating the constancy of the chromosomes and their retention 

 of definite peculiarities and characteristics is adduced by Browne 

 in " A Comparative Study of the Chromosomes of Six Species 

 of Notonecta " (Jour. Morph. vol. xxvii. March 1916), and it is 

 shown that all contain an XY pair of chromosomes. A short 

 discussion of Zwitterbienen, " The Eugster Gynandromorph 

 Bees " by Morgan, will be found in Amer. Nat. vol. 1, January 

 1916. 



Records of new molluscs are made by Preston in " Descrip- 

 tions of new Freshwater Shells from Japan " (Ann. and Mag. 

 Nat. Hist. No. 98, February 191 6), and " Descriptions of a new 

 Species and Sub-species of Ennea from Northern Nigeria, and 

 a " Correction in the Original Description of E. Reesi " (ibid. 

 No. 99, March 1916). Two papers by Sakyo recount " Studies 

 on the Geotropism of the Marine Snail, Littorina littorea " 

 (Biol. Bull. Woods Hole, vol. xxx. January 191 6) and " The 

 Geotropism of Freshwater Snails " (ibid.). 



Vertebrata. — A " Note on Intra-uterine Eggs of Heterodontus 

 (Cestracion) Phillipi " is contributed by Haswell (Quart. Jour. 

 Micro. Sci. vol. lxi. March 1916), and a " Description of Three 



