229 



and Culex pipiens. There is no reason for thinking it behaves differ- 

 ently in the open lield. While therefore it is quite possible for a change 

 of instinct and the development of a new race to occur, there is no 

 basis for this h^-pothesis at present. 



With regard to the points raised by Roubaud as to variations in 

 size and in the number of maxillary teeth [R.A.E., B, x, 53], it is 

 pointed out that in many cases individuals developed at low tempera- 

 tures are larger than those developed at a high temperature, and 

 that, probably, the larger individuals will have on the average a 

 larger number of teeth. There is, at present, no justification for 

 ascribing such variations to racial differences. 



The value of cattle in protecting man from this mosquito remains 

 an established fact. The author recorded in 1916 that in one case 

 malarial and other patients remained in the same barracks without 

 the occurrence of indoor infection, because the mosquitos assembled 

 in the military stables across the road. 



The increase, and more so the decrease, of cattle may have con- 

 siderable effect on the occurrence of malaria, and this may be one factor 

 in the occasional appearance of the disease under the conditions that 

 war and poverty give rise to. As regards the occurrence in an unusual 

 situation of Anophelines in numbers disproportionately large as com- 

 pared with surrounding infestations, it must be remembered that 

 this peculiarity is common to all mass occurrences of insects. 



An increase of cattle is not likely to lead to an increase of Anophelines 

 under ordinary rural conditions, so that it can only be beneficial. 



SiKORA (H.). Neue Rickettsien bei Vogellausen. [New Rickettsia in 

 Bird Lice.] — Arch. Scliiffs- u. Trob.-Hvg., Leipsic, xxvi, no. 9, 

 October 1922, pp. 271-272. 



Rickettsia have been obtained from Lipeurus bacillus on pigeons, 

 and similar organisms in ]\Iallophaga on the s^^dft. Rickettsia are 

 also recorded in Menopon from the domestic fowl. 



Edwards (F. W.). A Synopsis oS Adult Oriental Culicine (including 

 Megarhinine and Sabethine) Mosquitos. Part II. — Ind. Jl. Med. 

 Res., Calcutta, x, no. 2,' October 1922, pp. 430-475, 3 plates. 



In the second part of this synopsis [R.A.E., B, x, 197] keys are 

 given to, or descriptive remarks made on, the following genera : 

 Megarhinus, Uranotaenia, Hodgesia, Harpagomyia, Zeiignomyia, 

 Topomyia, Rachionotomyia, Wyeomyia, Heizmannia, Haeniagogus, 

 Mucidus, Pardomyia, Armigeres, Mimomyia, Ficalhia, Taeniorhynduis, 

 Theobaldia, Aedomyia, and OrtJiopodomyia. 



Uranotaenia roperi, recently described [loc. cit.] may prove to be 

 the same species as U. subnormalis, Mart. It had previously been 

 suggested that U. biniacidata, Leic, might be conspecific with U. 

 masJionaensis, Theo., from Africa, but it is now shown to be quite 

 distinct. Leicester's descriptions of the thorax of U. bicolor and U. 

 fitsca do not agree very closely, but the latter is undoubtedly a synonym 

 of the former. Topomyia decorabilis, Leic, is so distinct from other 

 species that it might almost be placed in a separate genus. T. argyro- 

 palpis, Leic, may be the same as Kingia gregoryi, Ludl., from the 

 Philippines, but examination of the males will be necessary to prove 

 this. The species described as Scutomyia treubi, Meij ., requires further 

 study ; it is probably an Armigeres. Taeniorhynchiis nigrosignatns, 

 a name proposed by the author for the mosquito wrongly determined 



