864 EXPERIMENT STATION RECORD. tVal. 3S 



stage lasts on an average 16 days. The adults transform in the fall and remain 

 in their pupal cells until the following spring, tlius completing a one-year life 

 cycle. 



Lists of references to the literature on the two species are included. 



Notes on the habits and metamorphosis of Lepidiota frenchi, E. Jarvis 

 (Bur. Sugar Expt. Stas. Queensland, Div. Ent. Bui. 5 (1917), pp. Uf, figs. 29). — 

 This beetle is said to rank second to the gray-back cockchafer in economic 

 importance among the scarabeids affecting sugar cane in Northern Queensland. 

 It feeds habitually on the roots of native cereals and other herbaceous plants 

 and has acquired a liking for cane. 



Insecticide tests with Diabrotica vittata, N. F. Howard (Jour. Econ. Ent., 

 11 {1918), No. 1, pp. 75-79).— In tests in 191G at Madison, Wis., of Bordeaux 

 mixture (2:4: 50) and lead arsenate paste (4: 50) combined, against the spotted 

 cucumber beetle the efficiency of tlie spray was about 25 per cent. The average 

 efHciency of insecticides, based upon two seasons' results, Is as follows : Zinc 

 arsenite 24 per cent, lead arsenate 17, sweetened lead arsenate 17, Paris green 

 16, zinc arsenate 14, Bordeaux-lead arsenate 14, lead arsenate dust 9, cobalt 

 arsenate 4, calcium arsenate 1, and arsenic bisulphid pef cent. 



Life history of Haltica jamaicensis, R. T. Cotton (Jour. Dept. Agr. P. R., 

 1 {1917), No. S, pp. 173-175).— An account of the largest of the flea-beetles 

 found in Porto Rico, which at times is extremely abundant. Though it now 

 confines its attention to weeds of the genus Jussia?a, it occasionally feeds on 

 garden beans. 



Sweet potato root borer (Cylas formicarius), W. E. Hinds {Alahama Col. 

 Sta. Circ. 37 {1918), pp. 3-8, figs. 9). — This circular, which is intended pri- 

 marily as a warning against the sweet potato root borer, gives a brief summary 

 of information regarding it. Quarantine against the pest is announced by the 

 Alabama State Board of Horticulture and the rules and regulations relating 

 tliereto are presented. 



Weevils which affect Irish potato, sweet potato, and ya.m, W. D. Pierce 

 {U. S. Dept. Agr., Jour. Agr. Research, 12 {1918), No. 9, pp. 601-611, pis. 7).— 

 Notes are first presented on three important Andean weevil pests which affect 

 Irisli potato tubers, namely, Rhigopsklius tucumanus, Premnotrypes solani, and 

 Trypopremnon latithoi'ax, descriptions of which have been previously noted 

 (E. S. R., 30, p. 459), and a table for the identification of Irish potato tuber 

 weevils in the field is also given. A description of the larva of T. latitliorax 

 follows, and a fourth potato tuber weevil from Cuzco, Peru, T. sanfordi, is de- 

 scribed as new to science. 



Four species of weevils are described as attacking the tubers of the sweet 

 potato {Iponioea batatas), namely, the sweet potato weevil (Cylas formicarius), 

 C. turdpennis, C. femoralis, an4 the scarabee (Euscepcs hatatw), the first-men- 

 tioned being the only one of the four to occur in the United States, though E. 

 hatatoB occurs in the West Indies, including Porto Rico, and in Hawaii, Guam, 

 and Brazil. A weevil which attacks the tubers of yams (Dioscorea batatas) in 

 Jamaica is described as new under the name Palosopus dioscorew. 



The strawberry root weevil, A. L. Melander (Proc. Wash. State Hort. 

 Assoc., 13 (1917), pp. 121-124; Better Fruit, 12 (1918), No. 11, pp. 7, 8; abs. in 

 Rev. Appl. Ent., Ser. A, 5 (1917), No. 12, p. 579).— This is an account of the 

 strawberry root weevil (Otiorhynchus ovattis), which was introduced from 

 Europe some 50 years ago and which now occurs in the Northern States and is 

 particularly injurious in British Columbia. The pest first appeared in Wash- 

 ington State in 1904 and has now invaded the principal berry regions of the 

 Stata Studies of the pest in British Columbia by Treherne have been pre- 

 viously noted (E. S. R., 37, p. 568). 



