105 



that one part of lead arsenate to eight parts of dust lime was a success- 

 ful remedy, and liquid spraying is also effective. Both the fall army 

 worm [Laphygma friigipeyda] and the true army worm [Cirphis 

 imipimcta] appeared in numbers about the same time. The spread 

 of the cotton boll weevil [Anthonomns grandis] into North Carolina 

 is recorded. 



Sanborn (C. E.). Report of the Entomological Department.— 2rWi 



Ann. Rcpt. Oklahoma Agric. Expt. Sta., 1918-19, Stillwater, 

 1919, pp. 40-44. [Received 6th January 1921.] 



Experiments with the cowpea Bruchid [Bnichus quadrimacidatiis] 

 show that there are seven generations and a partial eighth in Oklahoma. 

 The storing of cow-peas under lime and fumigating with carbon bi- 

 sulphide are the measures recommended [R.A.E., A, viii, 185]. 



Hall (R. R.) & Bovell (J. R.). Report on the Sugar-oane Experi- 

 ments for the Season 1918-1920.— £>6'/)/. Agric, Barbados, 1920, 

 77 pp. [Received 6th January 1921.] 



Results of manurial experiments on sugar-cane plots were again so 

 conflicting, owing to the presence of Diaprepes abhreviatus, L. (root 

 borer) and Lachitosterna {Phytalus) smitJii, Arr. (brown hard-back), 

 that it is impossible to draw any conclusions from them. During 

 1916, 2,305 of these beetles were captured, 5,962 in 1918, and 7,577 

 in 1920. In spite of the stumps having been dug up and the insects 

 killed, their numbers have therefore gradually increased. 



A table records collections of various stages of D. abbreviatus and 

 L. smitJii on a given area over a period of 18 months. The numbers 

 collected on different plots varied considerably. It is remarked that 

 as the dry season sets in the larvae of these two species burrow down 

 to the damp substrata, and during the exceptionally dry season 

 under review it is probable that many burrowed below the depth of 

 one foot to which tlie old cane holes were dug. They have been 

 found as much as three feet below the surface. 



Parrott (P. J.) & Olmstead (R. D.). The Leafhopper as a Potato 



Pest. — New York Agric. Expt. Sta., Geneva, N.Y., Tech. Bull. 

 77, March 1920, 18 pp., 5 plates. [Received 6th January 1921.1 



The leafhopper, Empoasca mali, Le B., which has been noticed 

 chiefly as a pest of apples, has recently caused considerable trouble 

 as a potato pest. Migration of over-wintering leafhoppers to potato 

 plants began in early June, oviposition occurring on the young plants 

 as soon as they appeared above ground, and continuing until the plants 

 were killed by frost in early October. The insects reached their 

 maximum numbers during late Juh^ and again in late August and 

 early September, when adults of the second generation were most 

 abundant. Infestation was severest from 15th August to 15th 

 September, nymphs and adults of the first and second generations 

 then intermingling. As a result of the punctures of the insects, small 

 brownish areas appeared at the tips and sometimes on the margins 

 of the leaflets. These areas gradually increased in size and number 

 until the leaf margins rolled upward, leaving only a small green area 

 in the middle of the leaflet. 



