854 EXPERIMENT STATION RECORD. 



The wheat bug (-ffilia germari cog-nata) (Bui. Agr. Algcrie et Tunisie, 19 

 {1913), No. 12, pp. 257, 258, fig. i).— This plant bug periodically invades the 

 cereal fields of the high plateaus and is the source of considerable injury. 



Contribution to the study of Helopeltis, C. Bernard {Dept. Latvdb. Mjv. en 

 Handel [Dutch East Indies], Meded. Proefstat. Thee, No. 17 {1912), pp. 1-19, 

 pi ^). — This is a report of studies of Helopeltis in the Dutch East Indies. 



The avocado membracid (Hoplophora monogramma), J. R. Inda {Bol. Dir. 

 Gen. Agr. [Mexico], Rev. Agr., 2 {1912), No. 2, pp. 142-145, pi. i).— This mem- 

 bracid is a source of considerable injury through its attack on the leaves and 

 branches of the avocado. 



On the Chermesidae of Switzerland, N. A. Cholodkovsky {Russ. Ent. 

 Ohozr., 12 {1912), No. 3, pp. 597-600; Schweiz. Ztschr. Forstw., 64 {1913), No. 4, 

 pp. 114-117). — ^A brief discussion of the occurrence and injury of the more 

 important species found in Switzerhind, based on personal studies by the author. 

 The mealy bugs of California, E. O. Essig {Mo. Bui. Com. Hort. Gal., 3 

 {1914), No. 3, pp. 97-143, figs. 46). — In this paper the author presents a popular 

 account of the mealy bugs. The subject Is taken up under the headings of 

 classification, general character, life history, economic and noneconomic species, 

 host plants, descriptions of species including food plants and distribution, 

 natural enemies, and artificial means of control. 



Woolly aphids of the elm, Edith M. Patch {Maine Sta. Bill. 220 {1913), 

 pp. 259-298, i)ls. 6, figs. 19). — The author states that it has been the intention 

 in the preparation of this bulletin and Bulletin 217, previously noted (E. S. R., 

 30, p. 548) to bring together all available information on this group of elm 

 aphids, as a progress report. 



The species briefiy noted are the woolly aphid of elm bark {Schizoneura 

 rileyi), a new elm gall for America (;Sf. lanuginosa ?) recently collected in Con- 

 necticut, elm rosette or leaf cluster aphid {8. lanigera [americana in part of 

 authors]), southern elm leaf curl {S. lanigera [americana in part of authors]), 

 northern curl of American elm {8. americana in part of authors), and elm cur- 

 rant aphid of Europe {S. ulnii [fodiens]). The notes on each species are ac- 

 companied by a bibliography. 



The third part of the Food Plant Catalogue of the Aphidae of the World 

 (E. S. P., 28, p. 60; 29, p. 654) follows (pp. 274r-298). 



Silkworm experiments, C. W. Woodworth {California Sta. Circ. 116 {1914), 

 pp^ ^). — This, circular announces that the station is prepared to distribute 

 silkworm eggs free of charge to anyone willing to cooperate in the effort to 

 make silk culture profitable in California. While the growing of silk has in 

 the past been unprofitable in this State there is said to be a possibility that the 

 cost of production can be diminished in one way and another sufficiently to 

 place the industry on a sound financial basis. Brief directions are given for 

 the feeding and care of the worms. 



The brown-tail moth (Euproctis chrysorrhoea), W. E. Bbitton {Connecticut 

 State Sta. Bui. 182 {1914), pp. 3-26, figs. J6).— This is a general account of the 

 brown-tail moth, its occurrence in Connecticut, remedial measures, etc. 



The sugar-cane borer (Diatraea saccharalis obliterallis), A. H. Rosenfeld 



and T. C. Barber {Rev. Indus, y Agr. Tucumdn, 4 {1914), ^o- 6-^, pp. 233-366, 



pi. 1, figs. 25). — ^This work deals with the history and occurrence in Argentina of 



D. saccharalis, its life history, habits, natural enemies, and means of control. 



A bibliography of 10 pages is appended. 



Hypsopygia costalis, injurious to lucern hay in the Romagna, Italy, D. 

 Sbrozzi {Italia A\gr., No. 18 {1913), pp. 444-45I, pi. 1; abs. in Internat. Inst. 

 Agr. [Rome], Mo. Bid. Agr. Intel, and Plant Diseases, 4 {1913), No. 12, pp. 

 1928, 1929). — This moth, which has been recognized since 1902 as a source of 



