﻿OF THE STATK ENTOMOLOGIST. 



NATURAL ENEMIES. 



The different natural enemies that have been enumerated in these 

 reports were often found efficiently workin"; to aid man in destroying 

 the pests, and two additional ones have been reported. Mr. P. R. 

 [Fig. 1] Uhler found the Black-bellied Lebia {Lebia atriventris 

 X' Say, a species of the same color and general appearance, 

 f-f^ but only half as lar^e as Z. grandls, Fig. 1) destroying it 

 around Baltimore; while the editor of the American 

 Agriculturist in the January (1876) number of that ex- 

 cellent journal, gives good evidence (p. IS) that the com- 

 (T^EBiA GRANDis. niou crow devours the beetles, and even digs up the ground 

 to get at them after they have entered it to hibernate. 



REMEDIES. 



The prevailing remedy has been the Paris Green mixture recom- 

 mended in the Fifth Report. Mr. Trask Lee, Trumble Co., Ky. {Coun- 

 try Gentleman^ April 29, 1875) shows that with flour that cost him 

 ■86.50 per barrel (the poorer and cheaper quality answering as well) 

 he protected 8^- acres at a cost ot $17.42, including labor. He prefers 

 flour and Pans Green to everythinj; else; and so does Mr. Elias Mott 

 {ibid. April 8, 1875) and many others for the reasons which I have 

 already given. ''T. of Iowa," in which signature I recognize an old 

 friend and intelligent observer, gives the following experience in the 

 Prairie Fanner tor July 3, 1875 : 



I liave had quite as ^ood success in using the iiiofredients from which the green is 

 ■inade, as trom the finished article, bouoht in i);iint and drua; shops at 50 cf-nts a pound, 

 <fspeclai!y wtien the local demand is so gr^at rhat it cannot be bought at ail The fol- 

 lowing directions for making it are taken Irom Brande's Chemistry: Dissolve two 

 pounds of sulphate of copper, blue vitriol, (costing 20 cents per lb., or 41) cents) in a 

 gallon of hot water, keeping it in a stone jar. Dissolve in another larjife jar, one pound 

 of wliite arsenic, (co-tiny 10 cents), and wo pounds of saleratus or pear ash (co-t 20 

 cents) in forty-four pounds of hot water, stirring well, till thoroughly dis>olved. These 

 articles, costing 75 cents, will make about five pounds of Paris green, costing $2 .50. 

 I usually keep them in solution and mix in the proper proportions, one part of the first 

 to five ot the latter, as they are needed. The green immediately bcirins to precipitate 

 in a fine powder, and is much more convenient for use, in solution, than the dry article 

 «old in the shops. 



Among the novel methods that have been employed in defence 

 against Doryphora, two are more particularly worthy of mention as 

 being reasonable and preventive, and as having been employed with 

 success. The first is to slice potatoes, dust the pieces with Paris Green 

 and drop them about a field early in thc^ season when the beetles come 

 from their winter quarters. They feed upon the slices and of course 

 die. The method can only be safely practiced where no domestic ani- 

 mals can get at the baits. The second is that first employed by Mr. 

 James Rivers of Cass County, Mich., viz., a mixture of chicken manure 



