858 EXPERIMENT STATION EECORD. [Vol.35 



Pseudaphycus gramirdeola reared from a dactylopiine coccid on stipa at Las 

 Vegas, N. Mex., and Elymus condensatus at Kimballs, Utah; P. prosopidis 

 reared from Pseudococcus prosopidis, Mesilla, N. Mex. ; P. tcebsteri reared from 

 E. virginicus at "Villa Ridge, 111. ; Aceropkagus gutierreziw reared from Pseudo- 

 coccus gutierrezice at Las Cruces, N. Mex. ; A. erii reared from Erium lichten- 

 sioides at Salt Lake City, Utah ; Aenasioidea tenuicornis reared from Kermes 

 miyasakii at Akabane, Japan; A. kermicola reared from K. essigii on Quercus 

 agrifoUa, Pasadena, Cal., and from K. galUformis at Murray, Utah; and the 

 genus Aphycopsis are described as new. 



A contribution to a knowledge of Cajiadian ticks, O. G. Hewitt (Proc. and 

 Trans. Roy. Soc. Canada, 3. ser., .9 {1915), Sect. IV, pp. 225-239, pis. .^).— This 

 is a summary of knowledge of the occurrence, hosts, etc., of ticks in Canada in 

 which 14 species and 1 variety are noted. A list of the literature referred to 

 is appended. 



Some centipedes and their venom, J. W. Cornwall (Indian Jour. Med. Re- 

 search, 3 (1916), No. 3, pp. 5^1-557, pis. 5). — "The orifice of the venom duct is 

 oval and lies on the dorsal surface of the venom claw, nearer the greater curva- 

 ture and at a little distance from the apex. Centipedes possess four distinct 

 pairs of glands with ducts opening near the head, namely, anterior salivary 

 glands, posterior salivary glands, third pair of glands, and venom glands. 

 Centipedes have detinite ductless hsemoiwietic organs. The toxic action of the 

 venom is relatively low and is a character of secondary importance. The main 

 function of the venom gland is probably to secrete digestive ferments, not to 

 furnish a lethal agent. Extract of the salivary and the third glands contains 

 lysins, which are selective, anticoagulin, diastase, invertase, and proteolytic 

 enzyms." 



FOOrS— HUMAN NUTRITION. 



Diet and dietetic therapeutics, C. A. Ewald and M. Klotz (Didt und Didto- 

 iJierapie. Berlin: Urban d Schivarzenberg, 1915, 4- ed., pp. X+^JO, fig. 1). — 

 "While based on the third edition of Ewald and Munk's Nutrition of Man in 

 Health and Disease (E. S. R., 8, p. 331) and designated in its subtitle as a 

 fourth edition of that book, the present volume differs in many respects from 

 the earlier. The general knowledge of the science of nutrition has progressed 

 so far in the last 20 years that the discussions of the general functions of food 

 and the stages in metabolism are no longer considered necessai-y in such a 

 handbook for the general practitioner and consequently have been omitted by 

 the authors. Where recent investigations have overthrown or extensively modi- 

 fied formerly accepted conclusions regarding specific subjects, more authoritative 

 work has been substituted for that previously cited, but where recent work 

 has simply confirmed older conclusions the sources utilized in the earlier 

 editions have been retained. The sections dealing with the diet of infants 

 and children both in health and disease are new, having been prepared by 

 Klotz, who has also contributed the present section on milk. 



Contributions to human nutrition (Zent. Einkaufsgesell. Beschrdnkt. Haf- 

 tung, Abhandl. 1915, Orig., Nos. 1, pp. IS, figs. 4; 2, pp. 8S, pis. 2, figs. 15; 1916, 

 Nos. 3, pp. 78; 6, pp. 9Jf, pls. 4- f^gs. 5). — This series of papers, in addition to 

 summarizing data on various phases of human nutrition, reports some investi- 

 gations curried on by the Central Purchasing Association, Ltd. The titles 

 and authors of the publications follow: The Treatment and Utilization of 

 Frozen Pork, by R. Plank and E. Kallert ; Investigations Regarding Energy 

 and Protein Requirements of the Higher Animals and Man, by H. P. Wamser 

 (in which paper an attempt is made to express, by means of mathematical 

 formulae, the protein and energy requirements of different species, age, sex, 



