64 



malaria is rare in districts where tomatoes are grown. The author 

 concludes that the problem of malaria is not yet entirely solved and 

 that the generally accepted formula that a malarial epidemic arises 

 from man infected with malaria in the presence of mosquitos needs to 

 be modified for one in which proper value is given to the factor of 

 environment. 



Verco (J. C). Romance in Medicine. II. Mosquito and Insect-borne 

 Disease. — Med. Jl. Australia, S^jdney, ii. (3rd year), no. 26, 

 23rd December 1916, pp. 533-540. 



The greater portion of this paper deals with the discoveries regarding 

 malaria and its transmission made since Laveran observed the malarial 

 parasite in 1880. Sleeping sickness, yellow fever and plague are also 

 mentioned. 



Lawrence (H.). On a Sliin Eruption associated with the Presence of 

 great Numbers of Demodex folliculorum. — Med. Jl. Australia, 

 Sydney, ii, (3rd year), no. 27, 30th December 1916, pp. 555-556, 

 Ifig. 



An increase in cases of an eruption having some resemblance to 

 impetigo contagiosa is recorded. A feature common to all these cases 

 is the presence of extraordinary numbers of Demodex folliculorum. 



Weidman (F. D.). Cytoleichus penrosei, a new Arachnoid Parasite 

 found In the diseased Lungs of a Prairie Dog, Cynomys ludovici- 

 anus. — Jl. of Parasitology, Urbana, III, iii, no. 2, December 1916, 

 pp. 82-89, 2 plates. 



A new Arachnoid, Cytoleichus penrosei, is recorded from the lungs of 

 a prairie dog, Cynomys ludovicianus, which died in the Philadelphia 

 Zoological Gardens of acute broncho-pneumonia. 



Typhus Fever. Measures for the Prevention of its Introduction at El 

 Paso, Texas. — U. S. Public Health Repts., Washington, B.C., xxsii, 

 no. 5, 2nd February 1917, pp. 197-198. 



The growing prevalence of typhus fever in Mexico has led to an 

 increase of the disinfection measures at El Paso. All incoming 

 travellers are inspected and those that appear to be infested with Uce 

 are treated in the disinfection building, their clothes and personal 

 efiects being sterilised by steam and their persons freed of vermin by 

 the application of gasoline or a mixture of vinegar and kerosene. 



VAN ZwALuwENBURG (R.H.). Rcport of the Entomologist. — Bept. 

 Porto Rico Agric. Expt. Sta., 1915, Washington, D.C., 23rd 

 November 1916, p. 42. [Received 30th March 1917.] 



The cattle tick {Margaropus annulatus australis) is being studied 

 with a view to working out a method of extermination by pasture 

 rotation applicable to Porto Rico. This tick is undoubtedly a most 

 serious drain on the island's prosperity, but it is hoped that its ultimate 

 extermination is possible. 



