ECONOMIC ZOOLOGY ENTOMOLOGY. 757 



In part 2 a statistical record is jiresented of tlie results of routine inspection 

 of beds in lodging houses for vermin. Diagrams are given which show the 

 relation in point of time between the prevalance of flies and diarrheal mor- 

 tality in London during the years 1907-1909, the numbers of flies belonging 

 to 6 principal genera caught in balloons and on papers during the summer of 

 1909, the seasonal prevalence of 6 principal genera of flies, and the seasonal 

 prevalence of bugs, fleas, and lice. 



Progress report of the investigation of pellagra, L. W. Sambon (Jour. Trop. 

 Med. and Hyg. [London'], 13 (1910), Nos. 18, pp. 271-282; 19, pp. 287-300; 

 20, pp. 305-315; 21, pp. 319-321).— " The many analogies existing between the 

 epidemiology of pellagra and that of the best known insect-borne diseases; the 

 constant association of the disease with Simulium-infested streams; the absence 

 of any other arthropod with similar distribution that might account for it; the 

 striking correlation between the fly and the disease in wide geographical dis- 

 tribution, peculiar topographical exigencies, extraordinary double season ac- 

 tivity, the marked influence of temperature, heavy rains, and inundations; are 

 all facts which strongly point to Simulium as the necessary carrier of pellagra." 



Sheep maggot fl^y in the West, W. W. Fboggatt (Agr. Gaz. N. S. Wales, 21 

 (1910), No. 10, pp. S00-S92). — A brief report is given of an investigation made 

 in the Trangie district of New South Wales, where this maggot is the source 

 of considerable loss to sheep breeders. 



" Our investigations show that the damage is caused by the maggots of the 

 2 common yellow blowflies ( CaUlphova viJlosa and C. Oceania;), found in both 

 the house and the bush all the year round. In winter they deposit eggs upon 

 everything they infest, but in summer the eggs are hatched in the body of the 

 fly and living maggots dropped. In no case have I found any species of the 

 bright green or blue metallic flies, so common about dead sheep, to breed out 

 from maggots taken from blown wool from the backs of live sheep. The de- 

 struction of all material in which these blowflies deposit their eggs or maggots 

 will be the greatest factor in reducing the sheep maggot fly pest." 



Technical results from the gipsy moth, parasite laboratory. — Investiga- 

 tions into the habits of certain Sarcophagides, T. L. Patterson and W. F. 

 FiSKE (U. S. Dept. Agr., Bur. Ent. Bui. 19, pt. 3, tech. ser., pp. 25-32).— The 

 authors' experiments here reported " indicate very conclusively that the sar- 

 cophagids in New England do not destroy living gipsy-moth larvae or pupse in 

 the field. From a collection of 2,G60 specimens not a single sarcophagid was 

 reared. In cages the flies would not oviposit on healthy or recently killed cater- 

 pillars or pupse, but did so freely after they became slightly decomposed. First- 

 stage maggots, when placed artificially within living pupse, failed to develop 

 in every instance, showing that the conditions were not favorable for their 

 growth. When living and decomposing larvne or pupse were placed side by side 

 in a cage, the flies selected the latter on which to oviposit, and normal larvse 

 developed." 



On the biology of Oscinis frit, M. Shestebikov (Isv. Moskov. Selsk. Khoz. 

 Inst. [Ann. Inst. Agron. EIoscou], 16 (1910), No. 3, pp. 207-228, figs. S).— This 

 is an account of studies made by the author in Russia. 



The carrot fly, J. C. Chapais (Nat. Canad., 37 (1910), No. 6, pp. 84-89).— 

 An account of Psila rosw, the carrot fly or carrot rust-fly. 



Studies of the natural history of Strepsiptera, N. V. Nassonov, trans, by 

 A. v. SiPiAGiN (Ber. Natiirw. Med. Ver. Innshruclc, 33 (1910), pp. VIII+206, 

 pis. 6, figs. 2). — This consists of translations from the Russian into German of 

 a number of papers by Nassonov and a supplement by K. Hofeneder. 



Concerning a cysticercoid from a jerboa flea, A. Dampf (Centhl. BaJct. 

 [etc.], 1. Ait., Orig., 54 (1910), No. 5, pp. 452-454, flffs. 2).— Up to the present 



