356 EXPERIMENT STATION RECORD. [Vol. 40 



the washing period of 15 minutes, this treotment to destroy the active stages 

 without the use of any special chemicals. Garments are then treated in the 

 regular manner until perfectly dry, when they should be placed in the hot air 

 tumbler at a temperature of 150 to 170° for 10 to 15 minutes, resulting in the 

 destruction of the eggs. By this method it will be possible to launder woolens 

 without shrinkage, and destroy the lice and eggs without the use of a special 

 chemical." 



The Angoumois grain moth, T. J. Headi.ee (Xcu: Jersey Stas. Cire. 92 

 (1917), pp. 4- fid*- 2). — A popular account. 



The formation of the germ band in the egg of the holly tortrix moth, 

 Eudemis naevana, L. H. Huie (Proc. Roy. Soc. Edinb., SS (1917-18). No. 2. pp. 

 15/f-165, pis. 2). — In the introduction to tiiis report it is pointed out that in- 

 vestigations have been carried out on the embryology of about 18 species of 

 Lepidoptera, but that thus far no account has been published on the embryology 

 of the Tortricidae, to which family E. not vana belongs. The paper includes a 

 bibliography of 12 titles. 



The importance of malaria to agriculture and studies on malarial soil. 

 G. Rossi {Soil 8cL, 5 (1918), Uo. ',. pp. 828-388).- A contribution from the In- 

 stitute of Agricultural Bacteriology of the Superior Royal School of Ami- 

 culture, Portici, near Naples, Italy. 



The economic bearing on hover flies, D. Miller [Jour, Agr. [New Z-al.], 

 17 (1918), No. 3, pp. 129-135, figs. 7). — A discussion of the economic importance 

 of syrphid fliea 



Experimental work with fruit flies. W. W. FaOGGATT {Agr. da:. N. 8. 

 Wales, 29 (1918), A"o. 8, pp. 579. 580). — Preliminary tests have led to the con- 

 clusion that fruit tlies {Dacus tr]/oni and CeratitU capitata) can be trapped 

 and poisoned with arsenical preparations, and various experiments are said to 

 be under way. 



Sprinkling sewage filter fly (Psychoda alternata), T. J. Heaim ee and C. S. 

 Beckwith (.rout: Boon. Bnt., 11 {1918), No. 5, pp. 895 \01).— The fact that this 

 fly proves Itself a serious nuisance wherever sprinkling filters utilized for the 

 purification of fecal sewage are located within o.7f> mile or less of human 

 habitation, by penetrating the houses and getting into food, etc., led to the 

 investigation here reported. Accounts by others of related species have been 

 previously noted (B. S. H.. 29, p. I'-O: 82, p. 552). 



Brief notes are first presented on the life history and habits of P. alternata 

 and P. cincrea. the former being the principal species concerned. The eggs 

 are deposited upon the surface of the stone in irregular masses of from 30 to 

 100. and at a temperature of 70° F. from 32 to 4S hours are required for 

 their incubation. The Larva; are very much like mosquito wrigglers and si»em 

 to pass their existence in much the same way. Soon after hatching they make 

 their way into the surface film, where they thrust their breathing tubes 

 through the film itself. At a temperature of 70° the larval stage ranges from 

 9 to 15 days and the pupal stage requires from 20 to 48 hours. 



Experimental control work has shown that both species can be destroyed 

 by the simple process of submerging the sprinkling Bewage filter Cor 24 hours 

 with the ordinary sewage as delivered to the sprinkling filters, without in any 

 way impairing the efficiency of the film upon which the activity and efficiency 

 of the sprinkling sewage filter depends. 



Simple treatment of manure to prevent fly breeding: The Panama method. 

 H. P. Carter (Proe. Med. Assoc. Isthmian Canal Zone, 10 {1917), pi. /. pp. 19, 

 80, pis. S). — The measures for fly control used in Panama City are s:iid to 

 consist In thorough cleaning of the stables once a day and the carting of all 

 the manure to a public dumping ground, where it is placed in an oblong pile 



