60 EXPERIMENT STATION RECORD. [Vol.38 



Descriptions of and observations on some chalcidoid Hymenoptera, A. A. 

 GiRAULT (Canad. Ent., ^8 (1916), No. 7, pp. 2.',2-246). 



An egg parasite of the army worm (Heliophila unipuncta), W. P. Flint 

 (Jour. Econ. Ent., 9 (1916), No. 3, p. 377). — A chalcidid parasite reared from 

 the eggs of the army worm in the vicinity of Springfield, 111., has been deter- 

 mined to be a species of Teleuoraus. 



Notes on Rhogas terminalis, W. E. Pennington (Jour. Econ. Ent., 9 (1916), 

 No. 4, pp. 4OI-4O6. pi. 1, fig. 1). — This paper deals with observations on R. 

 terminalis, a braconid parasite of the army worm, made at Hagerstowu, Md. 



In that region there appear to be four complete generations annually, with a 

 possibility of a maximum of six generations. The parasite is present through- 

 out the entire active season of its host and hibernates in the puparium stage. 

 It oviposits only in second and third instar host larvte. 



Breeding fruit fly parasites in the Hawaiian Islands, J. G. Bridwell 

 (Jour. Econ. Ent., 9 (1916), No. 5, pp. 472--)77).— This reports upon breeding 

 woi'k in Hawaii with introduced parasites. 



Municipal control of the Argentine ant, E. R. de Ong (Jour. Econ. Ent.. 

 9 (1916), No. 5, pp. 46S-472).—This ant, first recognized in California in 1908 at 

 only eight points, has since spread to most of the larger cities on the coast. In 

 the present paper the author describes the control measures made use of. 



FOODS— HUMAN NUTRITION. 



The vegetarian diet in the light of our present knowledge of nutrition, 

 E. V. McCoLLUM, X. SiMMoxDs. and W. Pitz (Ayner. Jour. Physiol., 41 (1916), 

 No. 3, pp. 333-360, pi. 1, figs. 19). — This article discusses the vegetarian diet in 

 the light of extensive experiments carried out at the Wisconsin Experiment 

 Station, in which restricted diets have been fed to several species of laboratory 

 and other animals. 



Attention is called to the fact that little confidence can be placed on the re- 

 sults of human experience with vegetarian diets because of the frequent con- 

 sumption of foods prepared with milk, eggs, and butter, and the use of soups, 

 gravies, etc., which include extracts of fats of animal origin. Although ex- 

 perience shows that grazing animals grow from a comparatively early age if 

 fed entirely on food derived from plants, the authors state that they have not 

 found " convincing evidence that any mammal has been adequately nourished 

 from weaning time by a mixture of the seeds of plants and has made the 

 maximum amount of growth and at the maximum possible rate." 



The results of work by other investigators on the adequacy of a vegetarian 

 diet for growth and maintenance are reviewed, and the authors reproduce a 

 number of charts from their own experiments showing the growth of labora- 

 tory animals (rats) when fed upon different vegetarian diets. 



Reference is made to earlier work by tlie senior author and others, in which 

 the fact was established that, in addition to purified protein, carbohydrate, fat, 

 and salt mixtures, there must be supplied two dietary factors wliose chemical 

 natures are at present unknown. These factors are referred to as fat-soluble 

 A and water-soluble B, rather than denoted by the indefinite term " vitamin." 



With reference to polyneuritis in pigeons, induced by diets of polished rice 

 or purified foodstuffs, the authors state that they are convinced that " all the 

 observed pathological phenomena can be accounted for in maladjustments re- 

 lating to the following factors : The inorganic constituents ; poor quality and 

 inadequate quantity of the protein content ; shortage of the .substances A or 

 B, or of both of them, and in certain cases the presence of toxic constituents lu 



