ECONOMIC ZOOLOGY — ENTOMOLOGY. 255 



terable virus, but as yet no evidence to substantiate this view has been pro- 

 duced. Infection naturally takes place through the mouth by means of the 

 food. Some of the imported parasites may be imjjortant factors in aiding the 

 dispersion of the vpilt disease. Although probable, there is no definite evidence 

 as yet that wilt is transmitted from one generation to another." 



A list of IS titles relating to the subject is included. 



The squash- vine borer, F. H. Chittenden {U. S. Dept. Agr., Fanners' Bui. 

 668 (1915), pp. 6, figs. 2).— A revision of Circular 38 of the Division of Ento- 

 mology, in which a popular account is given of the distribution, food habits, 

 natural history, and preventive and remedial measures for this pest. 



The verbena hud moth, D. E. Fink (U. S. Dept. Agr. Bui. 226 (1915), pp. 7, 

 pis. 3. fig. 1).—A summarized account of the life history and habits of, and of 

 control measures for, the verbena bud moth (Olcthreutes hchesana). This 

 moth appears to confine its injury solely to flowering plants, having been reared 

 from tiger flower (Tigridia pavonia), snapdragon (AntirrJiinum spp.), flag 

 (Iris spp.), hedge nettle (Stachys palustris), mullein (VerMscum thapsus), 

 verbena (Verbena spp.), closed gentian (Oentiana andrewsii), and false fox- 

 glove (Dasystoma flava). Injury is caused through its attacking the stems, 

 feeding upon flower heads, webbing seed capsules together to feed upon the 

 young and undeveloped seeds, and feeding upon dry seed pods. 



The eggs are deposited singly or in groups of from three to five on sepals of 

 flower buds or along the upi)er part of the flower stalk and hatch in from seven 

 to ten days. Under laboratory conditions the life cycle occupied 43 days as 

 follows: Eggs deposited March 2 hatched March 10, the larvae pupated March 

 31, and the adults appeared April 14. During July and August in 1913 the life 

 cycle was passed in 34 days. In the vicinity of Norfolk, Ya., where the observa- 

 tions were made in cooperation with the A^irginia Truck Station, at least five 

 or six generations are produced each year. 



The methods of control found effective against the larvae include the applica- 

 tion of arsenicals and the cutting back and destroying of infested flower stalks. 



A bibliography of ten titles relating to the subject is included. 



The serpentine leaf -miner on cotton, E. A. McGregor (Jour. Econ. Ent., 7 

 (1914), No. 6. pp. U7-45If, figs. S).— A report of studies at Batesburg, S. C, of 

 the dipterous leaf miner Agromy::a scV'tellafa on cotton. The paper supple- 

 ments a general account of the pest by Webster and Parks, previously noted 

 (E. S. R., 29, p. 857) in which they refer to it as A. pusilla. 



List of zoophagous Itonididae, E. P. Felt (Jour. Econ. Ent., 7 (1914), No. 6, 

 pp. 458, 459). — A list is given of 29 reared species. 



Arthrocnodax constricta n. sp., E. P. Felt (Jour. Econ. Ent., 7 (1914), No. 

 6, p. 4S1)- — The itonidid here described was reared at Rio Piedras, P. R., from 

 garden beans infested with the common red spider, upon which it is thought to 

 be predaceous. 



The losses to rural industries through mosquitoes that convey malaria, 

 D. L. Van Dine (Reprint from South. Med. Jour., 8 (1915). No. 3, pp. 184-194, 

 figs. 2). — A discussion of the mosquito-malaria problem in the South and of 

 investigations being carried on by the Bureau of Entomology of this Depart- 

 ment. The investigations under way consist of survey work, climatological 

 observations, biological and pathological work, and experimental control work. 



The details of an intensive study which is being made of malarial conditions 

 on a plantation of 3,500 acres located at Mound, La., in a region on the Mis- 

 sissippi where malaria is prevalent, are presented. It is shown that 48 out of 

 74 tenant families on the plantation were treated by the physician for malaria 

 during the crop season of 1914, and that a total loss of 1,842 days, representing 



3451°— No. S— 15 5 



