231 



Christophers (S. R.). The Development and Structure of the terminal 

 Abdominal Segments and Hypopygium of the Mosquito, with 

 Observations on the Homologies of the terminal Segments of the 



Larva.— /wf^. //. Med. Res., Calcutta, x, no. 2, October 1922, 

 pp. 530-572, 4 plates, 7 figs. 



A recent studj^ has been made of the development of the terminal 

 abdominal segments and hypopygium in Cimex \R.A.E., B, x, 72]. 

 The present paper is a similar study of the same parts in the male 

 mosquito. A description of the female parts and their development 

 is reserved for a further communication. The species in which the 

 development has been followed are Anopheles gigas, Giles, Theobaldia 

 niveitaeniata, Theo., Aedes {Stegomyia) argenteiis, Poir. {fasciata, F.), 

 Aedes (Finlaya) pitlchriventer, Giles, and Cidex concolor, R.-D. 



Pattox (W. S.). Hypoderma crossii, sp. n., parasitic in its Larval 

 Stages in Cattle and Goats in the Punjab. — Ind. J I. Med. Res., 

 Calcutta, X, no. 2, October 1922, pp. 573-578, 2 plates, 4 figs. Y 



Larvae removed from the skins of goats in the Punjab [cf. R.A.E., 

 B, X, 223] prove to belong to a new species of Hypoderma, which is 

 here described as H. crossi, sp. n. The number of larval stages has 

 not yet been determined. It is possible that the female oviposits 

 directly on the long hairs on the sides of the goat, and that the larvae 

 enter the skin below and remain there, without migration as in the 

 cas'e of H. bovis and H. lineata. No eggs have been found on the legs 

 of goats examined. About 90 per cent, of goats in the Jhelum district 

 are infested, but in the Gurdaspur district only a small percentage 

 is attacked ; the natives believe that infestation is confined to the 

 hilly districts pf the Punjab. Further records of the distribution are 

 desirable. 



AwATi (P. R.). Survey of Biting Insects of Assam with Reference to 

 Kala-azar for the whole Year from November 1921 to October 1922. 

 Biting Lisects found in Dwelling-houses. — Ind. Jl. Med. Res., 

 Calcutta, X, no. 2, October 1922, pp. 579-591, 4 figs. 



A survey has been made of the Polasbari and Jorhat districts lying 

 between the Brahmaputra and the Assam Range, large areas of which 

 are infected with kala-azar ; and as many as possible of the insects 

 associated either directly or indirectly with human beings in these 

 districts have been collected. The meteorological and physiographical 

 conditions of the areas are discussed. The numbers of Cimex hemiptera 

 [rotundatus) found were more or less equal in the infected and the 

 uninfected areas, but in both areas the collections during the wet 

 weather resulted in less than half the numbers taken in the dry weather. 

 This difference may be due to the continuous high temperature accom- 

 panied by high humidity in the wet season, or to artificial factors 

 (such as habits of the population), which may cause destruction or 

 disappearance of the bugs. Pediculus humanus was less prevalent 

 in the uninfected area than in the infected ; its distribution was 

 unaffected by the season. The proportion of the sexes of Cimex 

 was nearly equal in both areas, while in P. humanus it varied a good 

 deal. Other biting insects collected included Tnatoma [Conorhinus) 

 rubro fascial a, which is found in the infected area throughout the year, 



