( xxii ) 



ground that it is found only where chrysippus is the largely 

 predominant form, and, so far as is known, it does not occur 

 in, or has not yet reached, the parts where dorippus is rela- 

 tively abundant — that is, the desert strip along the E. coast, 

 extending in the E. African Protectorate inland at least to 

 the shores of Victoria Nyanza." 



Other localities. — Except for Capt. Carpenter's recent 

 captures only two other records are known to me: (1) "a 

 female in the collection of Mr. Ilobley which was taken in 

 German East Africa " (Eltringham, " African Mimetic Butter- 

 flies," p. 35). It may be conjectured that the specimen 

 came from near the E. shore of the Victoria Nyanza, for 

 Mr. C. W. Hobley's collection was largely made in the adjacent 

 Kavirondo-Nandi district (Trimen, Proc. Ent. Soc., 1903, 

 pp. xxxviii, xxxix). (2) An example, labelled " Uganda," at 

 Witley. Its history is, unfortunately, unknown. 



The " Fruit-fly " Drosophila and the inheritance of 

 small variations. — Prof. Poulton said that Prof. H. S. 

 Jennings of Baltimore, U.S.A., who had kindly sent a set of 

 his papers to the Entomological Society, had remarked in an 

 accompanying letter, Jan. 16, 1918 : " We feel that we have 

 here in America, in Morgan's Drosophila, a sort of machine 

 for grinding out answers to all sorts of questions in genetics, 

 and now that that question of the inheritance of small varia- 

 tions has been put to it, it yields an emphatic affirmative 

 answer." 



MUSCA AUTUMNALIS, De G. (CORVINA, F.), HIBERNATING IX 



a loft in the Isle of Wight. — Prof. Poulton exhibited 

 examples of 66 males and 80 females of Musca autumnalis 

 captured Dec. 14, 1917, in the cistern-loft of St. Helen's 

 Cottage, St. Helens, Isle of Wight. The loft had not been 

 examined in the winter since Jan. 4, 1915, when far greater 

 numbers of the flies were present, as described in Proc. Ent. 

 Soc, 1915. ]>. xxi. The 146 flies were obtained by sweeping 

 with the hand into a tin box the individuals of two long- 

 narrow patches on the close hoarding of the roof, each stretch- 

 ing, as in 1915, along the angle made by a rafter with the 

 roof. By sweeping in this way probably \ of the sluggish 

 fijes were secured. In addition to the 146 M. autumnalis 



