254 EXPERIMENT STATION RECORD. [Vol.35 



Parasitic Insects, by K. H. C. Jordan (pp. 149-157) ; Morpholo^cal and Sys- 

 tematic Investigations of the Red Spider {Tetranychus dufoiir), by I. Tragardh 

 (pp. 158-163) ; and Notes on the Outbrealis of the Kieferneule {Panolis pini- 

 perda) in the Dresden Forest Reserve, by Neumeister (pp. 164-167). 



The distribution of California insects, I, E. O. Essig {Mo. Bui. Com. Hort. 

 Cal., 5 {1916), No. S, pp. 113-120, figs. 6). — The author considers the distribution 

 of six of the more important insects occurring in California, and presents maps 

 which show the occurrence of each. 



Observations on insect pests in Grenada, H. A. Ballou {Bui. Ent. Research, 

 6 {1915), No. 2, pp. 173-181). — The notes here presented relate to the cacao 

 thrips {HeUotJirips rubrocinctus) , the cacao beetle {Stirastoma dejyressum), 

 the acrobat ant {Cremastogaster sp.), and the control of scale insects by natural 

 enemies. 



The insects of central Europe, especially Germany, edited by C. Schroder 

 {Die Iivsekten Mitteleuropas inshesondere Deutschlands. Stuttgart: Franckh'- 

 sche Yerlagshandlung, 19U, vols. 2, pp. VIII +256, pis. 5, figs. 124; 3, pp. VIII+ 

 213, pis. 8, figs. 133). — In the second volume of this work, the first of which is 

 not at hand, the Formicida; are dealt with by H. Stitz (pp. 1-111) and the 

 Ichneumonidre, Braconidre, Chalcididse, etc., by O. Schmiedeknecht (pp. 113- 

 256) ; and in the third the Cynipidse by J. J. Kieffer (pp. 1-94) and the Ten- 

 thredinidas, Cephidaj, Siricidse, and OryssidfE by E. Enslin (pp. 95-213). An 

 extensive bibliography and an index to the genera and species accompany each 

 paper. Several colored plates are included. 



Manufacturing tests of cotton fumigated with hydrocyanic-acid gas, W. S. 

 Dean {U. S. Dept. Agr. Bui. 366 {1916), pp. 12). — Spinning and chemical labora- 

 tory tests reported indicate that fumigation of cotton with hydrocyanic-acid 

 gas does not affect, to any material extent, the percentages of waste, spinning 

 qualities, tensile strength, bleaching, dyeing, or mercerizing properties of the 

 cotton. 



Contribution to the knowledge of olive insects of Eritrea and of South 

 Africa, P. Silvestri {Bol. Lab. Zool. Gen. e Agr. R. Scuola Sup. Agr. Portici, 9 

 {1914-15), pp. 240-334, figs. 78; abs. in Internal. Inst. Agr. [Rome'\, Mo. Bui. 

 Agr. Intel, and Plant Diseases, 6 {1915), No. 5, pp. 765-768).— A detailed 

 account of observations of insect enemies of Olea chrysophyUa and 0. verru- 

 cosa made during the course of excursions in quest of parasites of the olive fly 

 {Dacus olece). Systematic descriptions of many species new to science are 

 accompanied by biological notes. 



Eorest insects of Sweden, I. Tragardh {Sveriges Skogsinsekter. StockJiolm: 

 Hugo Gebers, pp. VI II +279, pis. 16. figs. 136; rev. in Canad. Ent., 47 {1915), No. 

 6, pp. 199, 200). — Following preliminary chapters on the characters and organi- 

 zation of insects, their development, and general methods of control, the author 

 deals with the different orders, commencing with the Coleoptera, describing 

 those families and their members that are injurious to forests or useful as 

 parasitic or predacious enemies of forest insects. A special chapter is devoted 

 to gall-making insects and Eriophyes and another to control measures. The 

 work concludes with a table giving keys to the various insects according to 

 the trees and parts of the trees they attack. 



Descriptions of a new genus and species of the discodrilid worms, M. C. 

 Hall {Proc. U. S. Nat. Mus., 48 {1915), pp. 187-193, figs. 3).—Ceratodrilus 

 thysn-nosomus collected on crayfish in the streams of Great Basin, Salt Lake 

 City, Utah, is described as representing a new genus and species. 



An anatomical note on the genus Chordeiles, A. Wetmore {Proc. Biol. Soc. 

 Wash., 28 {1915), pp. 175, 176, fig. 1). 



