INSTITUTE AND COLLEGE, PUSA, FOR 1913-14. 77 



Mr. S. K. Sen has been assisting me in the above enquiry 

 and has also worked at the bionomics of mosquitos and 

 particularly of mosquito-larvae. The calomel method (see 

 Annual Report, 1912-13) has given good results when used 

 on a small scale in the field, and merits attention. Mr. Sen 

 made a very careful investigation of the respiration of mos- 

 quitos in all stages, and has contributed an article on the 

 subject to the Indian Journal of Medical Research. 

 Publication of various articles by Mr. Patel and myself in 

 the same journal has been suspended until a definite settle- 

 ment of the question of " medical ' work at Pusa. Mr. 

 H. N. Sharma has also worked largely at mosquitos, and has 

 attempted to get at the connexion between the existence of 

 small wounds and abnormal feeding reactions. Mosquitos 

 have been got to feed on red ink, salt solution, and other 

 beverages, but no satisfactory explanation has been arrived 

 at of a very curious fact. 



In connexion with Major Holmes' Surra investigation, 

 Mr. Grove, and subsequently Mr. Mitter, visited Kath- 

 godam with the object of assisting the entomological side of 

 the enquiry. This appears to be more complex than was 

 originally supposed, and may necessitate the services of 

 Mr. Patel or myself. 



IV. — Veterinary. 



In addition to the Surra investigation at Kathgodam 

 and Muktesar, work on the bionomics of flies likely to be 

 Surra carriers has continued. Mr. P. G. Patel made an 

 extended tour in the Punjab with Colonel Newsom, and was 

 able to give valuable assistance in the work on insect para- 

 sites. Mr. Patel has been also working with me on the 

 habits and life-history of lice. 



In the course of a tour in Madras I was able to dispel a 

 long-standing supposition that Indian hides are seriously 

 damaged by Warble-flies. These flies seem to be in fact 

 rare in the plains, and an examination of damaged skins, 

 chiefly sheep and goats, showed that the damage known in 

 the trade as " warbles " is really due to the punctures conse- 



