88 DECIDUOUS FEUIT INSECTS AND INSECTICIDES. 



leaves. This should be done as soon as the larva3 are noticed upon the 

 foliage, as all from each cluster of eggs will then be in a single group, 

 whereas, if the treatment be deferred until the larvse have separated 

 into individmils or small groups, as mentioned before in this paper, 

 much more labor will be involved. 



An arsenical treatment, applied as soon as the larva? are in evidence, 

 would prove effective. Two aj)plications are necessary, one for each 

 generation of the larvae. The time of application will vary greatly, 

 being earl}^ in the South and becoming later in northern States, ac- 

 cording to the time the larvae appear upon the grapes, which is the 

 best standard for determining when the treatment should be applied. 



The arsenical used may be either arsenate of lead, Paris green, or 

 arsenite of lime. Arsenate of lead is preferred on account of its bet- 

 ter sticking qualities, and also because it is less likely to injure the 

 foliage. Three pounds of any good brand of the latter added to the 

 ordinary Bordeaux mixture (5-5-50 formula) will make a very effi- 

 cient remedy. 



Since the larvae spin their cocoons in the leaves and trash at the 

 bottom of the vines, clean culture is to be recommended. Where 

 clean culture is followed, and where spraying is practiced for the 

 grape-berry moth, grape root-worm, and grape curculio, this insect 

 need never be feared. 



BIBLIOGRAPHY. 



The following bibliography contains practically all of the liter- 

 ature on Harrisina amencana. All of the articles have been seen 

 and verified, except where mention to the contrary is made. 



1S32, Griffith. — Agloape amcricana Boisd.<Cuv. Reg. Lep., p. 84 his., fig. 11. 



Figured but not described. 

 1833. Harris, T. W. — Procris dispar. <Ciit. liis. Mass. (Not seeu.) 

 1836. BoiSDUVAL, J. A. — Procrh amcricana. <Sp. Geu. Lep., I, p. 10, fig. 7. 

 Figured but not described. 

 1837. Henderson, G. — Agloapr aiiicricana.<.Cuy. lleg. Au., Vol. IV, PI. 1, fig. 



11. 



Figured but not described. 

 1839. Harris, T. W. — Procris amcricana. Cat. N. A. Spbiuges. <Sillimaii's 

 Jouru. Sci., vol. 36, p. 282. 

 Figured and described for first time. 

 1844. GuiiRiN-MENEViLLE, F. E. — Agloapc amcricana Boisd.<Icou. Cuv. Keg. 

 An., Vol. Ill, p. 501, 1829-1838 (1844). 

 Figured and described. 

 1844. Harris, T. W. — Procris amcricana l?()isa.<Hovey's Mag. Hort., Juiie, 

 1844, Vol. X, pp. 201-205. 

 First economic reference and general account of life history and liabits. 



1854. Walker, Fr.\ncis. — Ctcnvcha (Ai/hxipc) amcricana Roisd. <Cat. Lep. 



Rrit. Mus.. n, p. 286. 

 Description. 



1855. (Jlovek, Towneni). — Procris umcricana.KAiiv'ic. Rep. U. H. Com. Pat- 



euts (1855), pp. 59-88. 

 Cicneral acgount. 



