PARIS GUEEN" : IXSECTrf DESTROY ABLE BY IT. 33 



sis unicolor (Kirby), the margined Ijlistcr-bcetlc — Epicauta cinerea 

 (Forst.), the striped blister-beetle — EpicaiUa vittata (Fabr.), the cu- 

 cumber flea-beetle — Epitrix cucumeris (Harris), and species of the 

 tortoise-bfcfcles — Copfocijdn auriclialcea (Fabr.) and C. clavata 

 (Fubr. ), when numerous. 



It would also be useful against the striped cucumber-beetle — Dia- 

 irotica vittata (Fabr.), and other leaf-eating beetles and their larvae. 



It would be effectual, used in its liquid form with a force-pump, for 

 the prevention of the defoliation of the horse-chestnut, the smaller 

 elms find other shade-trees by the caterpillar of the white-marlced tus- 

 sock-moth — Orgyia leucostigma (Sm.-Abb.), M'hich has become such 

 a iiuMic nuisance in many of our principal cities. 



It has been found to be of great value in preventing the ravages of 

 the spring canker-worm — Anisopteryx vernata (Peck), an insect which 

 for some reason, has not occurred as the serious pest in tlie apple or- 

 chards of ^'ew York that it has in the Eastern and several of the Wes- 

 tern States. With this agent at command, and its efficacy having 

 been thorougly tested, it is hoped that the threatened increase and 

 spread of the canker-worm in New York may be effectually checked.* 



The liquid maybe used for the protection of low evergreens from the 

 larvjB of saw-flies and of the basket or bag-worm — Thyridojitcryx 

 cphemercBforinis (Haw.). It should also be available for ridding the 

 Virgiiiia creeper — Ampelopsis quinquefoUa, from the eight-spotted 

 Forester — Aly^jia octomaculata (Fabr.), and the beautiful wood-nympji 

 — Emlryas grata (Fabr.), two prettily-banded blue caterpillars which 

 frequently almost strip the vines in the city of New York and its 

 vicinity. 



Paris green would also be an excellent agent for the destruction of 

 the army-worm — Leuoania unipwida llaw., applied copiously to 

 the fields where it abounds, or, when it has commenced its marches, 

 to broad strips of*grass-land lying in its line of march, and subse- 

 quently plowing under the poisoned surface. 



In brief, it will be of service whenever extensive depredations occur, 

 not easily controllable by other means, from leaf-eating insects and 

 their larva3, upon leaves not used for food of men or animals, or only 

 used after so long a period that the poison shall have been entirely 

 washed away, or even upon edible fruit occurring at the time in so 



*Tlic followins^ active measures against Lhis pest were employed iiitlie extensive orchard 

 of Mr. Chapin, in East Bloomfield, Ontario county, N. Y., of one hundred and twenty acres: 

 " The canker-worm commenced its inroads, and was worst last year on tlie interior trees. 

 Jlr. Chapin showered them with a mixture of Paris green and water, which brought them 

 dead to the ground in a few hours. The water was drawn in a bo.K holding over two hun- 

 dred gallons, in which was mixed two and a half pounds of Paris green. A forcing-pump 

 and hose threw a stream high above each tree, where it broke into a spray, and falling, 

 sprinkled every part." — Country Gentleman, xliv, 1879, p. 710. 



5 



