THE STATE ENTOMOLOGIST. 



85 



New York, found that they would even bore into corn cobs for this 

 purpose in preference to entering the ground, wherever such cobs 

 were accessible.* The Eight-spotted Forester, on the contrary, has 

 no such habit, and while the only mode of combating it, is to pick the 

 larvse off and burn them, the Wood Nymphs may be more easily sub- 

 dued by scattering a few corn cobs under the vines in the summer, 

 to be raked up and burned in the winter. 





THE AMERICAN FROCBIS— Procris [Acoloithus] Americana] 



Boisd. 



(Lepidoptera, CtenuchidEe.) 



During the months of July and August, the leaves of the Grape- 

 vine may often be found denuded of their softer parts, with nothing 

 t^s- 58 -l but the veins, and sometimes only 



a few of the larger ribs left skeleton- 

 ^gg^wfe-g-^ joT ^ e ' to tell of the mischief that has 



^^Py|^H»^ jfHk h e © n done. Very frequently, only 



s » portions of the leaf will be thus de- 

 nuded, and in that event, if we ex- 

 amine such a* leaf closely, we shall 

 find the authors of the mischief 

 drawn up in line upon the yet leafy 

 tissue with their heads all towards 

 the margin, cutting away with their little jaws and retreating as they 

 feed. 



These little soldier-like files 

 are formed by worms in black 

 and yellow uniforms which pro- 

 duce a moth popularly known 

 as the American Procris. The 

 eggs from which they hatch, are 

 laid in small clusters on the un- 

 derside of the leaves, and while 

 the worms are small, they leave 

 untouched the most delicate 

 veins of the leaf, which then pre- 

 sents a delicate net-work appear- 

 ance as shown at the right of 

 Figure 59 ; but when they be- 

 come older and stronger they 

 \ devour all but the larger ribs, as 



at the left of the figure. 



*Fitch's Rep. Ill, p. 82. 



fThis is the Aglaope Americana of Clemens, Procris Americana of Boisduval and Harris, and 

 Ctenucha Americana of Walker. 



^H 



