99 



infection in southwestern New Mexico, but in Texas and Montana it 

 has been more prevalent than in previous years. Of 414 horses and 

 mules inspected for scabies 74 were dipped under Bureau supervision. 



Greater progress thaii in any previous year has been made with regard 

 to cattle tick [Boophilus annulatus] extermination. Areas aggregating 

 79,217 sq. miles have been freed from ticks and released from quarantine, 

 and 47,843,791 Inspections or dippings were made, as against 34,927,959 

 in the previous year, 33,789 cattle dipping vats being in operation. 



In connection with studies on the transmission of hog cholera it has 

 been found that under ordinary conditions the hog louse, Hdematojnnus 

 suis, is incapable of transmitting the virus. It is also doubtful whether 

 the house-fly, Musca domestica, is concerned with the dissemination of 

 the disease under natural conditions, although it may harljour the virus 

 for some days and possibly may infect animals by feeding on their eyes 

 or fresh wounds. Experimentally the stable fly, Stomoxys calcitrans, 

 has conveyed the disease by biting healthy pigs after feeding on the 

 ears of infected animals or by being crushed and placed in the feeding 

 trough after being gorged with blood of diseased pigs. It has not 

 however been determined whether this fly is a factor of practical 

 importance in the spread of the disease. 



The work of the Zoological Department, consisting of the investigation 

 of parasitic diseases of animals and the study, collection and determina- 

 tion of animal parasites, has been continued. Investigations show that 

 mange on pigs is spread chiefly by direct bodily contact and may be 

 controlled by four dip2:)ings in lime-sulphur or arsenical solutions at 

 intervals of from 6 to 7 days. One dijjping of crude petroleum or 

 cottonseed oil proved sufficient for the eradication of lice on pigs. 

 Medicated pig v/allows are an effective and convenient means of treating 

 pigs for lice and mange in hot weather. Experiments in the treatment 

 of sarcoptic mange in cattle and the ear tick [Ornithodorus megnini\ 

 confirm those of the previous year [R.A.E., B, vii, 92, 93.] 



Kellogg (V. L.) & Ferris (G. F.). The Anoplura and Mallophaga of 

 North American Mammals. — Leland Stanford Junior Univ. 

 Public, Univ. Series, Stanford Univ., Cal, 1915, 74 pp., 8 plates, 

 18 figs. [Received 3rd March 1920.] 



This paper deals vfith 31 species of Anoplura, including 10 new species 

 and 2 new varieties, and 29 species of Mallophaga, including 1 new 

 species. It also contains a key to the famihes, subfamihes and genera 

 of Anoplura, as well as a mammahan host list of North American 

 Anoplura and Mallophaga. 



Carrenter (G. D. H.). Third, Fourth and Fifth Reports on the 



Bionomics of Glossina jxilpalis on Lake Victoria. — Repts. Sleeping 



Sickness Commission Royal Soc., London, no. 17, 1919, 101 pp. 



4 figs, 6 charts, 1 map. [Received 10th March 1920.] 



A description is given of a tour made from January to March 1914 



among the islands lying parallel to the coast of Lake Victoria between 



Entebbe and Jinja, with the object of ascertaining the factors that 



cause Glossina palpalis to vary in abundance on dift'erent islands. As 



a result of this inspection, the conclusion was reached that to support 



Glossina an island must be of a certain minimum size, however suitable 



(680) j^2 



