105 



Aw ATI (P. R.). A Note on the Genitalia of Portchinsky's Species, 

 M. corvina (vivipara) and M. corvina (ovipara). — Ind. Jl. Med. 

 Res., Calcutta, viii, no. 1, July 1920, pp. 89-92, 1 plate, 2 tables. 

 [Received 11th April 1921.] 



As a result of the examination of the genitaha of Portchinsky's 

 species of M. corvina, it appears that the viviparous and oviparous 

 forms cannot be seasonal varieties of the same species, but are two 

 distinct ones, and should be referred back to their respective names 

 M. corvina, F. (viviparous) and M. autumnalis, DeG. (oviparous). 



Wright (R. E.). A Case of Myiasis of the Frontal and Ethmoidal 

 Sinuses and the Orbit. — Ind. Med. Gaz., Calcutta, Ivi, no. 2, 

 February 1921, pp. 58-59, 1 fig. 



In the case of myiasis described, an entomological note by W. S. 

 Patton states that larvae of Chrysomyia bezziana were collected from 

 the lesion. The eggs were laid directly on the ulcerated surface, and 

 though the larvae were very near the brain tissue, they did not enter 

 the skull. This emphasises the fact that the larvae of this fly do 

 not penetrate bone or cartilage. 



NicHOLLs (H. M.). Annual Report of the Government Microbiologist. 



—Tasmania Dept. Agric. & Stock, Kept. 1919-20, Hobart, 1920. 

 pp. 21-25. [Received 12th April 1921.] 



Sheep bot-flies [Oestrus ovis] are extensively distributed over Tas- 

 mania, but apparently are not of any great economic importance 

 under present conditions. 



A plague of fleas was recorded during the year, the species concerned 

 being Ctenocephaltis canis (dog flea). The outbreak was apparently 

 the result of using soil from an old pigsty to improve a garden. Other 

 fleas recorded are Stephanocircns dasyuri from a bandicoot, and a bat 

 flea, Ceratopsylla sp. 



Riley (W. A.). Division of Entomology and Economic Zoology.^ 



28th Ann. Rept. 1919-20, Minnesota Agric. Expt. Sta., Univ. 

 Farm, St. Paul, 1920, pp. 41-44. [Received 13th April 1921.] 

 Attention is called to the presence of flies of the genus Drosophila 

 in dissecting rooms and to the possibility of their being disease-carriers. 

 Their ability to breed in materials preserved in formalin solutions 

 and in various other reagents is being studied. Studies on the role 

 of rodents as carriers of parasites of man have been continued, as well 

 as work on fish parasites. 



Sealy (S. T.). Mosquito Work, Season of 192Q.— Conn. Agric. Expt. 

 Sta., New Haven, BuU. 226, 1921, pp. 208-210. 



During 1920 the drained salt-marshes were constantly patrolled, 

 the water kept in circulation, and the necessary supplementary draining 

 done. The mosquitos that have been the most troublesome have 

 come, not from the drained marshes, but from adjoining ones where 

 no ditches have been installed. As soon as any surface breeding was 

 noted on a drained area, it was immediately drained to the nearest 

 ditch. A detailed account is given of the work done in various 

 localities. In one district the settling tanks used to catch the waste 

 water from paper miUs were found to be the breeding-place of numbers 



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