328 JOURNAL, BOMBAY NATURAL HISTORY SOCIETY, Vol. XV, 



y c !lL lCi ~ was very rare and the larva was not isolated. 



jacies, biles, J 



A. Jeypo- was also very rare, and only two larvse were 

 remise James, isolated. 



was one of the most constant, the larva being found 

 in all forms of clean natural waters. The mature 



A [ CLYYhfi SI 



mi "i 1 1 ' insect does not exactly correspond with any of the 



allied species described by James in his " Malaria in 

 India, " but the larva is identical ; and it would therefore appear 

 that the gnat bred is another variation of A. Jamesi. 



It has been noted that the larvse of this species mounted in formalin 

 show very marked variations with regard to their frontal bristles. 

 These variations were so striking as to make it appear at first that sepa- 

 rate species were being dealt with ; but the examination of a large 

 number of imagines showed no variation. The extreme variation in the 

 bristles are shewn in figs. 7a and 7b of plate. Many living larvse were 

 examined, and the bristles in all cases were found to be true to type ; 

 these larvse were then mounted in formalin and the variations again 

 appeared. It became evident that the variations were mechanical and 

 were probably due to the fine filaments making up the branches of the 

 bristles becoming adherent to the parent stem, and thereby causing an 

 apparent difference in character. It is, therefore, important, in larvaj 

 with bristles of this description, to examine living specimens to make 

 absolutely sure of their true nature. 



is generally described as a wild species. In Karwar, 

 at certain periods of the year, as, for example, at the 



r?., end of the rains, it was the only common Anopheles 



rimus, (jriles, ' J r 



found in houses. It first made its appearance in early 

 September, and for two months afterwards large numbers were captured. 

 In all cases eggs were easily obtained, when required, in captivity. It 

 was not until October that the larva was first discovered ; but, from then 

 up to the end of the year, it was extremelv common in all forms of clean 

 waters, especially in rice fields. On one occasion its larvae were found 

 together with those of A. Rossi in a muddy road-side puddle. 



The egg of this species and of A. barhirostris has an enveloping 

 membrane of extremely beautiful structure. This membrane embraces 

 the egg and closely resembles a net in appearance ; it is of the simplest 

 structure, consisting of a single layer of very regular, hexagonal cells 

 with dotted outline and granular matrix. It is very friable. Towards 



