136 THE HOP. 



insect, for the reason that it is a normal denizen of 

 regions too far south for the successful commercial 

 cultivation of the hop. In fact, the only hop-grow- 

 ing region where it has ever been found is in southern 

 Wisconsin, and, as has been shown, the culture of hops 

 has been largely abandoned in that state. It occurs, 

 however, commonly upon the hop vines grown in the 

 dooryards throughout the southern and mid-western 

 states, and will readily be recognized from the accom- 

 panying figure. It is one of the stinging or urticating 

 caterpillars, and its spines coming in contact with a 

 delicate skin have very much the effect of one of the 



FIG. 69. SADDLE-BACK CATERPILLAR. 



Natural size. (After Riley.) 



nettle plants. The insect over-winters in the pupal 

 state within its cocoon, and there are two or more gen- 

 erations each year. 



OTHER CATERPILLARS 



Descriptions of the remaining leaf-feeding cater- 

 pillars will hardly be necessary in this connection. The 

 species found most commonly upon the hop are as fol- 

 lows: Theda humuli, Harr.; Ctenucha virginica, Charp.; 

 Acronycta brumosa, Guen.; Acronycta americana, Harr., 

 Orgyia antiqua, L.- Halisidota caryae, Harr.; Halisidota 

 tessellata, S. &A.; Plusia precationis,Guen.; Lcucarctia 

 acraea, Dru.; Hypena scabra, Fab., and Hyphantria 

 cunea y Dru. 



