131 



Alcock (Col. A.) ^- SiMMKus (Miss S. L. M.). Remarks on the 

 Systematic Position of A nopli (']('.'< sinensis, Wiedemann. — .11. 

 Loud. Schl. Trap. Med., ii, pt. 2, April 1913, pp. lOl-KM. 



The authors object to the subdivision of tlie genus Anopheles 

 and its elevation to the status of a subfamily, because, in their 

 opinion, the genus exhibits a long' series of slight gradations 

 represented at one end by Anopheles maculipennis and at the 

 other by a form such as A. pulchernmus (Cellia pulcherrima). 

 They are of opinion that only four species of the subgenus 

 Myzorhynchus are entitled to recognition namely: — Anopheles 

 sinensis, Wied., A. mauritianus , Grp,, A. barbirostris, Wulp., 

 and A. umbi'osus, Tlieo. 



Summers (Miss S. L. M.). A Synopsis of the Genus Fldehotomus. 

 —Jl. Lond. Schl. Trop. Med., ii, pt. 2, April 1913, pp. 104- 

 116. 



In this article, which is strictly systematic, the author divides 

 the known species of Phlebototnus by continents, giving the salient 

 characteristics of each species. The total number of species 

 recorded is 20, distributed as follows: — l^lurope 4, Asia 9, Africa 

 5, America U. 



Wenyon (C. M.). Experiments on the Transmission of Tiypano- 

 soma lewisi by means of Fleas. — Jl. Loud. Schl. Trop Med., 

 ii, pt. 2, April 1913, pp. 119-123. 



The autlior tlescribes experiments which he has made upon fleas 

 fixed on wires by ^N^oller's method Tliese were first fed on him- 

 self, in order to determine by examination of the excrement that 

 they were uninfected, then upon an infected rat, and subsequently 

 again upon the author himself, until the characteristic small 

 infective trypanosomes of Swellengrebel and Strickland had 

 appeared in the faeces. The general result of the experiment was 

 to show that the common rat flea of India, Xenopsylla cheopis, 

 is a true host of Trypanosinna lewisi; and the author is of opinion 

 that another important point results from tlie experiment, namely, 

 that it can be no longer held that a dift'erence in invertebrate host 

 necessarily means a difference in species of trypanosome. The 

 fact that in one locality a trypanosome is transmitted by a certain 

 fly, whilst in another locality a similar trypanosome is transmitted 

 by a fly belonging to a different genus is not a proof lliat the 

 trypanosomes are different. If, however, it could be shown that 

 the trypanosome in one locality was incapable of development in 

 the fly of the other locality, then it could be fairly assumed that 

 i:he trypanosomes were really distinct. Such a test could, w4th 

 profit, be applied to the two human trypanosomes, T. (javibiense 



