ECONOMIC ZOOLOGY ENTOMOLOGY. 1171 



In search of parasites, G. Compere (Jour. Dept. Agr. West, /lust., 18(1905 . Vb, 

 6, pp. 547,548). \ shorl popular accounl is given of a recenl visit to China in 

 Bearch of the parasites of red scale and purple scale and the announcement is made 

 that in the near future an attempt will he put forth t.. secure parasites <>i the potato 

 moth and woolly aphis. 



Some tree and wood-infesting- insects. Cabbage snakes, II. G arm AN A. ,.- 

 tucky Sta. Bui. 120, />/>. 45-81, pis. ;, figs. 6). The elm-leaf beetle has gradually 

 Bpread over the eastern part of tin' State, where it has destroyed many neglected 

 elms, particularly the imported species. 



The use "t bands aboul the tnmks of elms is without effed in keeping the insects 

 away from foliage, but sticky bands or other obstructions maj be used for attracting 

 the insects at the time of pupation. In one case more than 13,000 beetles were 

 destroyed in this way aboul the ha-' of a single tree. Just a- effective work, how- 

 ever, may be accomplished by the use of scalding water or kerosene from time to 

 time. The beetles on the foliage may be destroyed by the use of Paris green at the 

 rate <>f 1 lb. per LOO gal. <>f water, together with I lb. of slaked lime or arsenate of 

 lead at the rate of •': \<> J lbs. per 100 gal. of water. 



Notes are presented on insets affecting oak and other trees. <>ak-^ are attacked 

 by leaf miners and K< runs pubesa us. The latter may lie destroyed by spraying with 

 lime-sulphur-salt wash. Brief accounts are presented of walnut worm, cottonwood 

 leaf beetle, vagabond -all louse, poplar leaf tyer, willow leaf beetle, willow flea bee- 

 tle, willow slug, apple-tree measuring worm, cicadas, .Inn.- bugs, and other forest 



insects. 



Considerable injury is reported to casks from the attacks of hark beetles, i-articu- 

 larly Monarthrum fasciatum and M.Tnali. The wood of vinegar barrels, beer k< 

 wine casks, etc., was perforated by >mall holes which wen- most numerous near the 



hoops and at the joints between the staves. Since these insects bore into the m 1 



in hope of finding fungus upon which t<» live, it is desirable to treat the casks so a- to 

 destroy the fungus. For this purpose Bordeaux mixture, copper sulphate, lime- 

 sulphur wash, or bisulphite of lime are useful. The attack of the beetles is largely 

 prevented by scalding the casks and treating them with lime. 



On account of the unusual popular interesl aroused in cabbage snakes, some atten- 

 tion was given to this subject. The term "cabbage snake" appears to have been 

 applied to a slender species of Mermis which is parasitic in the bodies of a number 

 of insects. In some localities the term has also been used for Oeophilus bipuntieeps. 



The black locust tree and its despoliation, C. A. White /'"/'. 5 

 (1906), No. ■:. pp. ..'ii-Jis).— < >n account of the fact that the black locust is a rapidly 

 growing tree it has recently been planted on an extensive scale for the production 

 of railroad ties and for other purposes. The author believes, however, that on 

 account of an attack of three especially injurious insects on the plantations, these 

 trees are doomed to failure. 



These pests are a leaf miner, gall insect, and the locusl borer I Cylleru robinix). 

 The last-named insect is the mosl injurious, burrowing through the trunk and lai 



branches, and rendering the w 1 unlit for use. Infestation by this pest is not 



observed at once; in fact the tree may be practically ruined for economic purj 

 without injury to the hark. The locust borer is exceedingly injurious w aerever the 

 black locust occurs in this country except in parts of ( California. Notes are given on 

 the habits and life history of this pest and on possible remedies. 



No effective remedies, however, have been devised. The application of repellent 

 washes to the trunks of trees is suggested, hut would be rather expensive. 



The root-louse of the Norway spruce, A. .1 tcoBi Tharand. Forstl. Jahrb., 

 (1905), No. S, pp. 177-197, pi. 1). The habits and life history of Rhizomaria p 

 are described in considerable detail. 



