FOODS HUMAN NUTRITION. 557 



Three new species of Coccophagus, family Encyrtidae, A. A. Gieault (Ent. 

 News, 27 {1916), No. 1, pp. 33-35). — Coccophafjus mayniclavus reared from 

 Aleurochiton sp., at Berlice, Demerara, British Guiana; and C. mewicanus and 



C. coxalis taken on a fig lecanium at Porto Bello, Panama, are described as 

 new. 



Macrosiagon flavipennis in cocoon of Bembex spinolse, H. S. Barber (Proc. 

 Ent. Soc. Wash., 17 (1915), No. 4, pp. 187, 188). 



The life cycle of the Dryinidae, hymenopterous parasites of Homoptera, 



D. Keilin and W. R. Thompson (Compt. Rend. Soc. Biol. [Paris], 78 (1915), 

 No. 5, pp. 83-87, figs. 10). — This article deals with hymenopterous parasites of 

 the Fulgoridse and Jassidse. 



The formation of hymenopterous plant galls, W. Magnus {Die Enfstehung 

 dcr Pflanzengallen vernrsacht durch Hymcnopteren. Jena: Gustav Fischer, 

 1914, PP- 160, pis. 4, figs. 32).— The first or special part (pp. 4-118) of this 

 work dealing with the galls and gall formers of the families Cynipidfe, Chal- 

 cididfe, and Tenthredinidse is followed by a more general discussion (pp. 

 119-157). 



Ametastegia glabrata, a holarctic sawfly, S. A. Rohwee (Proc. Ent. Soc. 

 Wash., 17 (1915), No. 4, pp. 198, 199). 



The mating habits of some sawflies, S. A, Rohwer (Proc. Ent. Soc. Wash., 

 17 (1915), No. 4, pp. 195-198, pi. 1, fig. 1). 



FOODS— HUMAN NUTRITION. 



Biochemical comparisons between mature beef and immature veal, W. N. 

 Berg (U. S. Dept. Agr., Jour. Agr. Research, 5 (1916), No. 15, pp. 667-711, figs. 

 6). — Tlie object of the investigation here reported was to ascertain whether the 

 flesh of calves three weeks of age and under is fit for human food. Forty-one 

 calves 7 days old or less were used for making the analyses, the artificial di- 

 gestion tests, and feeding experiments with cats. The results are summarized 

 as follows : 



" During the study of the chemical composition of mature beef and of imma- 

 ture veal, no differences between them that are physiologically significant were 

 detected. 



" In a large number of artifical-digestion experiments immature veal digested 

 as fast as mature beef. The speed of digestion was measured by thi*ee different 

 methods [which are described in detail]. 



" Cats were fed on a diet in which immature veal was the sole source of 

 nitrogen. The young animals grew normally on the diet ; the older ones became 

 fat. A pair of cats, after living two-thirds of a year on the diet, produced a 

 litter of healthy young kittens, which, after the nursing period, continued on the 

 immature-veal diet, with .excellent growth. 



" The work indicates that immature veal, wlien properly prepared, is fit for 

 human food, especially when its deficiencies in fat and possibly in small 

 amounts of undetermined constituents are counterbalanced in the ordinary 

 mixed diet." 



A list of the cited literature is appended. 



The tilefish: A new deep-sea food fish (U. S. Dept. Com., Bnr. Fisheries 

 Econ. Circ. 19 (1915), pp. 6, figs. 2). — Information is given regarding the appear- 

 ance, disappearance, and recurrence of Lopholatilus chanuvleonticeps, popularly 

 known as the tilefish. Twelve recipes are given for the preparation of this fish 

 for the table. 



The preparation of protein-free milk, H. H. Mitchell and R. A. Nelson 

 (Jour. Biol. Chein., 23 (1915), No. 2, pp. 459-467).— A method is described for 

 the preparation of protein-free milk for experimental purposes. 



