1060 EXPEKIMENT STATION EECOED. 



given on May beetles, orange leaf-weevil, brown scale, and West Indian peach 

 scale. 



Attention is being given to the diseases and insect pests of pineapples, 

 bananas, coffee, and sugar cane. 



Diseases and insect pests of coffee, J. W. Van Leenhoff (Porto Rico Sta. 

 Rpt. 1006, pp. 31, 32). — Leaf weevils which commonly live on lai'ger trees 

 around coffee plantations may fall on the coffee trees and feed upon them, 

 causing considerable damage. The coffee leaf-miner was not as abundant as in 

 previous years. Considerable benefit was noted from the thorough fertilization 

 of infested trees. 



Bibliography of Canadian entomology, ('. .1. S. Bethune (Separatr from 

 Trans. Roij. ,s'oc. Canudit. .L ser., 12 {1906-7), Hec. IV, pp. 55-65). — A brief 

 bibliography of works relating to Canadian entomology and published in 1905 is 

 presented in an alphabetical order under the authors' names. 



The genus Leucaspis, L. Lindinger {•Jahrb. Hainbnrg. Wiss. A)ist., 23 {1905), 

 Beiheft 3. pp. 1~60, pis. 1). — The literature relating to this genus of scale 

 insects is reviewed in connection with a bibliography of 154 titles. The author 

 discusses the general anatomical features of the genus, with suggestions regard- 

 ing the relationship of different species, and presents an analytical table for 

 the identiticatiiin of the various si)ecies. 



The tobacco thrips, a new and destructive enemy of shade- grown tobacco, 

 W. A. Hooker {U. 8. Dcpt. Agr.. Bar. Ent. Bill. 65, pp. 2Ji, pl.s. 2, figs. 2).— In 

 l'J04 attention was called to an attack of thrips upon shade-grown tobacco. 

 Other references to injuries of this sort are also noted by the author. The 

 species under discussion in this bulletin is Euthrips nicotiana:, which is de- 

 scribed as new. 



The injury caused by this insect is referred to as white vein on account of 

 the color of the veins of infested tobacco leaves. This is quite distinct, how- 

 ever, from white vein of northern grown tobacco, which is due to some physio- 

 logical disorder. 



The insect appears to be distributed rather widely throughout the Southern 

 States and feeds upon a number of weeds and other plants as well as upon 

 tobacco. Only 12 or 13 days are required for a life cycle during warm weather. 

 The insect hibernates in the adult stage. 



The tobacco thrips is most successfully controlled by spraying with kerosene 

 emulsion diluted with 10 parts of water and carefully mixed, since free kero- 

 sene will burn the tobacco leaves. The application should be made in the 

 evening. Other insecticides were tried with fairly satisfactory results, but 

 were not as effective as the kerosene emulsion. In addition to the use of this 

 insecticide, it is also suggested that the seed bed should be separate from the 

 field in wlii<'li the tobacco is subse(]uently planted. 



Surface caterpillars, 11. ^I. Lefroy {Agr. .four. India, 2 {190t), No. 1, pp. 

 Ji2-'i6, pi. 1). — The term surface caterpillars is used as equivalent to cutworms 

 and notes are given on a number of these pests which attack plantings of opium, 

 peas, and other crops. In combating them, the best success was had from the 

 use of a poison bait containing 4 lbs. of white arsenic and 8 lbs. of sugar in 

 gals, of water which was used to moisten 80 lbs. of chopped straw. 



Locusts {Rlioilesian Agr. ./our.. // (1907). Xo. 3. pp. 236-2Ji7). — Large quan- 

 tities of arsenite of soda have been used in attenqits to destroy locusts. This 

 application of arsenical poisons led to some comitlaints that locust birds were 

 thereby destroyed. An investigation of this question showed that very few 

 if any locust-eating birds are destroyed by feeding upon poisoned locusts. A 

 brief summary is given of the discussion held at a recent intercolonial con- 



