179 



is undoubtedly the latter. The theoretical explanation offered for this 

 is that the shape of the parasite and the unyielding consistency of its 

 substance results in its lodgment in the capillaries to a greater extent, 

 and in that position larger numbers multiply and survive than m 

 the case of the other species. 



King (W. V.). U.S. Bur. Ent. Natural Malaria Infection in 



Anopheles Mosquitoes.— .4 wjcr. //. Trop. Med., Baltimore, i. 



no. 1, January 1921, pp. 35-39. [Received 23rd August 1921.] 



In 1917 a series of examinations were made of Anophehnes collected 



under natural conditions in Louisiana and Mississippi to determine 



the rate of infection in malarial regions. The results obtained at the 



end of the first season were not entirely complete, but 5,878 dissections 



and examinations were carried out, the species concerned being 



Anopheles quadrimacidatus, A. crucians and .4. pnnctipennis. The 



first named was by far the most numerous (5,673 individuals), and 



• 54 per cent, were infected, though only two were in the infective 



stage when captured. No examples of A. crucians or A. pnnctipennis 



were found infected. 



Craig (C. F.). The Classification and Differential Diagnosis of the 

 Aestivo-Autumnal Malaria Plasmodia.— ^1 ;n^r. //. Trop. Med., 

 Baltimore, i, no. 2, March 1921, pp. 57-96, 6 charts, 3 plates. 

 [Received 23rd August 1921.] 



In 1909 the author proposed a separation of the two species of 

 malarial parasites associated with aestivo-autumnal infection, and 

 named the quotidian parasite, Plasmodium falciparum quotidianum. 



The points of difference in the morphology and development of 

 P. praecox [falciparum) and P. praecox quotidianum, as observed in 

 the blood of man, are here described and summarised in tabular form. 

 Their morphological differences are as constant and distinctive as 

 those between P. vivax and P. malariae, while the striking difference 

 in the temperature curves to which they give rise serves to differentiate 

 them still further. 



There is no direct experimental evidence that they are two distinct 

 species, as there are no records of experimental production of quotidian 

 aestivo-autumnal malaria by inoculating P. praecox quotidianum into 

 susceptible individuals or through the bites of experimentally infected 

 mosquitos. Successful experiments have been recorded, but the 

 exact species of aestivo-autumnal malaria used was not ascertained, 

 it being thought that only a single one was concerned. 



The author considers that the evidence now given is almost 

 sufficient to entitle quotidianum to full specific rank, but until this is 

 actually proved, this organism should be regarded as a subspecies 

 of P. praecox. 



SiNTOx (J. A.). Some Cases of Myiasis in India and Persia, with a 

 Description of the Larvae causing the Lesions.— /h(//V?« //. 



Med. Res., Calcutta, ix, no. 1, July 1921, pp. 132-162, 4 plates, 



8 figs. 



Previous records of myiasis are reviewed, and six cases from the 



author's personal observations in India are dealt with. These include 



nasal, buccal and cutaneous myiasis in man, and the latter also in a 



dog and camel. The flies concerned are Chrysomyia {Pycnosoma) 



(4669) o 2 



