1916] ECONOMIC ZOOLOGY ENTOMOLOGY. 361 



seven mosquitoes dissected, and the development of P. falciparum, in four 

 (20 per cent) of twenty specimens. These four infections, however, occurred 

 in a series of thirteen specimens fed on one person, so that the percentage was 

 actually 33. 



" With A, crucians, oocysts or sporozoites or both oocysts and sporozoites of 

 F. falciparum were found in nine (75 per cent) of the twelve specimens dis- 

 sected. No tests were made with this species and P. vivax. 



"A. quadrimaculatus was employed as a control species in the experiments 

 and became infected in the following ratio: Eight (66 per cent) of twelve speci- 

 mens with P. vivax, and three (15 per cent) of nineteen specimens with 

 P. falciparum. 



" In determining the relative susceptibility of the three species only those in- 

 dividuals which had fed upon the same gamete carriers are considered. The 

 number of mosquitoes from which the percentages are computed is too small 

 to make the results entirely conclusive." 



A bibliography of 15 titles is appended. 



Anopheles punctipennis. — Its relation to the transmission of malaria; 

 report of experimental data relative to subtertian malarial fever, M. B. 

 MiTZMAiN {Puh. Health Rpts. [U. S.], SI (1916), No. 6, pp. 301-307).— "Two 

 hundred and nineteen specimens of A. punctipennis were dissected from 3 

 to 38 days after multiple bites on individuals whose blood contained varying 

 numbers of subtertian gametocytes (estivo-autumnal crescents). No infection 

 was observed in the dissection of stomachs and salivary glands. 



" Two healthy individuals were bitten 91 and 180 times by specimens of 

 A. punctipennis, 4 to 33 days after sucking blood of a subtertian malarial 

 carrier. In this experiment, and subsequently in the employment of a healthy 

 volunteer to feed 22 additional mosquitoes of this same species, A. punctipennis 

 could not be incriminated in the transmission of subtertian malarial fever. 

 The negative results in this experiment check only with the negative findings 

 in the dissections of A. punctipennis, as it is recognized that the volunteers 

 were not under absolute control ; that is, because of the possible exposure 

 to bites from infected anophelines while living in New Orleans. 



" Control feedings with 74 specimens of A. quadrimaculatus resulted in an 

 infection of 13.8 per cent, and with three specimens of A. crucians of 33.3 

 per cent. The coincidence in which one person developed subtertian malaria 

 11 days following the single bite of an A. quadrimaculatus that liad become 

 infected (as shown by dissection) 17 days previously by biting a heavily 

 infected carrier, pointed strongly to this as the source of infection. This 

 might be offered as an additional check in the experiment, recognizing, how- 

 ever, the limitations that might be placed on it because of lack of absolute 

 control of the volunteer living in New Orleans." 



Observations on the Culicidae, B. Galli-Valebio (Centbl. Bakt. [etc.], 1. 

 AM., OrUj., 76 (1915), No. 4, pp. 260, 261).— This note relates to the hibernation, 

 biology, and breeding places of Culicidse in Switzerland. 



Observations on the bionomics of Stegomyia fasciata, 3. W. S. Macfie 

 (Bui. Ent. Research, 6 (1915), No. 3, pp. 205-229) .—Notes on the author's 

 observations of the yellow fever mosquito, relating to length of life, blood feed- 

 ing, ovulation, intolerance of the larvae to common salt, etc., much of which 

 data is presented in tabular form. 



A note on treatment of swamps, stream beds, ponds, wells, pools, and 

 other mosquito infested areas for the destruction of their larvse, H. 0. Wilson 

 (Madras: Madras Fisheries Bur., 1914, pp- 14, P^s. 8). — A note on mosquito con- 

 trol work in India. 



