88 DECIDUOUS P^RUIT INSECTS AND INSECTICIDES. 



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

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

 Avhereas, if the treatment be deferred until the larvae have separated 

 into individuals 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 applications are necessarj^, one for each 

 generation of the larva?. The time of application will vary greatly, 

 being early in the South and becoming later in northern States, ac- 

 cording to the time the larvse 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. AVliere 

 clean culture is followed, and where sprajang 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 Ilanisana a»iericana. All of the articles have been seen 

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



1832, Griffith. — Agloape amcricana Boiscl.<Cuv. Reg. Lep., p. 84 his., fig. 11. 



Figured but not described. 



1833. Harris, T. W. — Procris dispar.<.Cat. lus. Mass. (Not seen.) 



1836. BoiSDUVAL, J. A. — Procris americana. <Sp. Gen. Lep., I, p. 16, fig. 7. 

 Figured but not described. 

 18.37. Henderson, G. — Afiloaiif <nn erica no. KCxiv. Reg. An., Vol. IV, PI. 1, fig. 

 11. 

 Figured but not described. 

 1839. Harris. T. W. — Procris amcricana. Cat. N. A. Sphinges. <Silliman's 

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

 Figured and described for first time. 

 1844. GuERiN-Mf:NEViLLE, F. E. — Agloape amcricana Boisd.<Icon. Cuv. Reg. 

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

 Figured and described. 

 1844. Harris, T. W. — Procris amcricana Bois(I.<IIovey's Mag. Hort., June, 

 1844, A'ol. X, pp. 201-205. 

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



1854. Walker, Francis. — Ctenucha (Agloape) amcricana Boisd. <Cat. Lep. 



Brit. Mus., II, p. 286. 

 Description. 



1855. Glover, Townend. — Procris amcrica nu. <Aiiric. Rep. U. S. Com. Pat- 



ents (1855), pp. 59-88. 

 General account. 



