862 EXPEEIMENT STATION EECOED. [Vol. 38 



from All gust 4 until September 12, with the largest number on August 10. 

 From 683 larvae collected on sand cherry on July 28, only two moths subse- 

 quently emerged during the season, one on August 28 and the other on Sep- 

 tember 9. Ovipositlon of the first brood moths took place in 1915, from August 

 15 to 19. The second brood eggs began to hatch in 1915 on August 31, and 

 continued to hatch until September 8, the average incubation period being 15.6 

 days. The lai'vae were observed feeding from August 23 to November 14, the 

 maximum length of the feeding period being 74 days, the minimum 39 days, 

 and the average 52.1 days. While cocoouing normally takes place in the soil, 

 13 of 361 individuals recorded pupated in the webbed foliage in which they had 

 lived as larvfe. 



A number of parasites were reared, including four ichneumonids, namely, 

 Angitia discoocellellw, Cremastus forhesii. Cremastus sp., and Epirus indigator; 

 three braconids, Apanteles gelechice, Ascogaster carpocapsco, and Epirhyssalus 

 atriceps; two tachinids, Exorista pysfc and Frontina ancilla; and one bombyliid, 

 Anthrax lateralis. 



In spraying experiments where arsenate of lead powder at the rate of 1 lb. to 

 50 gal. of water was employed 5 per cent of the terminals were webbed, where 

 used at the rate of 1.5 lbs. to 50 gal. of water, 3 per cent were w^ebbed, whereas 

 with trie unsprayed checks 90 per cent were webbed. It is suggested that the 

 occurri^nce of tliis pest may be so local as to be remedied by cutting out tlie 

 infested terminals or branches, and that it will probably not occur in damaging 

 numbers in orchards sprayed regularly with arsenicals for control of the plum 

 curculio 



Notes on the strawberry leaf-roller (Ancylis comptana), R. L. Webster 

 {Jour. EcoH. Ent., 11 (1918), No. 1, pp. ^2-46). — This paper consists of brief 

 notes on the biology of the strawberry leaf-roller, a more complete account of 

 which is being issued in bulletin form. 



Notes on the biology of the Ang'oiunois grain moth, Sitotroga cerealella, 

 J. L. King (Jour. Econ. Ent., 11 (1918), No. 1, pp. 87-9S, figs. 2).— This is a 

 report of biological studies at a field station located at York, Pa., In the 

 southeastern part of the State. In this section the wheat production is about 

 one-tliird of the total grown in the State, and it suffers an aggregate annual 

 loss from insect injury of over a million dollars. A diagram is given which 

 shows the appearance of the several broods during the year. It is pointed out 

 that the practice of storing unthrashed wheat in the mow is responsible for 

 much of tlie loss, and the importance of thrashing as soon after harvesting as 

 possible and storing the grain in tight granaries or in good sacks is emphasized. 



The apple leaf-mining case bearer (Coleophora volckei n. sp.) W. H. 

 VoLCK (Mo. Bui. Com. Hort. Cat, 6 (1911), No. 11-12, pp. 463-^67, figs. 6).— 

 These notes relate to the life history and habits of a new tortricld to be 

 described by Heinrich under the name of Coleophora volckei. Its injury, 

 which consists of one or more small punctures in the skin extending a short 

 distance into the pulp, has been more or less in evidence on Pajaro Valley 

 apples at harvest time for several years past. General observations indicate 

 that nicotin sulphate is capable of a very marked control of C. volckei, but that 

 the control of the codling moth or fruit-tree leaf-roller is not so good as with 

 arsenicals. 



Malaria control. — A report of demonstration studies conducted in urban 

 and rural sections, R. C. Derivaux, H. A. Taylor, and T. D. Haas (Pub. 

 Health Serv. U. S., Pub. Health Bui. 88 (1911), pp. 51, pis. 11, fi^s. 7).— A report 

 of demonstration studies in malaria control conducted by the Public Health 

 Service in cooperation with the International Health Board during 1916 in two 

 highly endemic localities in southeastern Ai-kansas. 



