ENTOMOLOGY. 71 



Some miscellaneous results of the work of the Division of Entomology, 

 VII ( U. S. Dept. Agr., Division of Entomology Bui. 44, pp. 99, pi. l,figs. 19). — Some 

 of the aphides affecting grains and grasses of the United States are discussed by T. 

 Pergande (pp. 5-23). The author is of the opinion that the American apple plant- 

 louse and the grain louse are identical and that Aphis mail is a distinct species 

 belonging to a different genus from the grain louse of Europe. Notes are given on 

 the habits, food plants, and life history of this species and detailed descriptions are 

 presented of Macrosiphum gnu/aria, M. cerealis, and M. trifolii. The proper name of 

 the European grain louse is supposed to be Siphocoryne arcn:r. 



F. H. Chittenden discusses the chestnut weevils and other nut-feeding species 

 (pp. 24-39). The weevil injuries to chestnuts are due to the attacks of Balaninus 

 jtrohoscidms and B. rectus. Notes are given on the habits of these species as well as 

 on B. caryae which is injurious to hickory nuts and also on various other species of 

 weevils. The use of arsenical or contact poisons in controlling these pests is not 

 satisfactory. Better results are obtained from bisulphid of carbon, by heating the 

 nuts, or by keeping them in cold storage. The same author presents an account of 

 the co wpea-pod weevil (pp. 39-43). This species is Chulcodermus xneus. The best 

 remedies in controlling it in cowpcas appear to be fumigation of the seed with 

 bisulphid of carbon and spraying with arsenate of lead combined with Bordeaux 

 mixture. 



Additional observations on the tobacco stalk-weevil are presented by J. C. Brid- 

 well (pp. 44-46). This insect attacks potato, tobacco, and various related wild 

 species of plants. The weevil hibernates in the stems of tobacco or Jamestown 

 weed. In controlling the pest, best results are obtained from burning the stalks of 

 these plants. 



F. Maskew reports results of experiments with Fuller's rose beetle in California 

 (pp. 46-50). "Where this pest attacks strawberry plants it is recommended that 

 infested plants be pulled up and destroyed as soon as they begin to wilt. Carbon 

 bisulphid is also recommended as well as drowning by irrigation wherever the latter 

 method can be practiced. 



C. L. Marlatt gives an account of importations of beneficial insects into California 

 (pp. 50-56). Scutellista cyanea is reported as being wonderfully effective in destroy- 

 ing the black scale in California. The larva of this parasite feeds upon the eggs of 

 the black scale. The parasite is easily distributed from place to place and maintains 

 itself vigorously. It is active throughout nearly the whole year. It is said that 

 Rhizobius ventralis has shown itself to be very efficient in destroying the cottony 

 maple scale which is injurious to apples in California. 



J. S. Hine presents a report on insects injurious to stock in Louisiana (pp. 57-60). 

 During the author's study 5 species of horse flies were observed, viz, Chrysops flavi- 

 <hix, Tahanus atratus, T. lineola, T. costalis, and T. quinquemaculaius. A number of 

 natural enemies of these pests were observed. It is suggested that large numbers of 

 adult horse flies could be captured by the use of trap window screens. 



C. L. Marlatt presents a brief account of the distillate spray in California (pp. 60, 

 61). It has been found that 2 per cent strength of this spray does not injure foliage 

 but is not always completely effective. 



F. V. Theobald gives an account of three British fruit pests which may be intro- 

 duced on nursery stock (pp. 62-70). These pests are Laverna atra, PsylJa mali, and 

 Eriophyes ribis. 



The cherry fruit fly is discussed by F. H. Chittenden (pp. 70-75). This pest is 

 reported as prevalent in the District of Columbia, but as being susceptible to inclem- 

 ent weather. Brief notes are given on methods of controlling the pest. 



Notes are also given on the natural coloration of silks of lepidoptera by G. Leverat 

 and A. Conte (pp. 75-77). 



