138 INJURIOUS INSECTS 



and now, in some localities, from New England to Mich- 

 igan and Illinois, it often occurs in troublesome numbers. 

 It attacks the clover in the- niow or stack, webbing the 

 stems together with multitudes of silken threads, among 

 which is such an abundance of black excrement as to un- 

 .fit the clover for feeding to animals. The white cocoons 

 are present in such numbers, that one, without close 

 examination, would pronounce the hay to be mouldy. 



T 



Fig. 93. CLOVER- WORM (Asopia costalis, Fabr.) 

 1 arid 2, Larva ; 3, Cocoon , 4, Pupa ; 5 and 6, the Moth , 7, the \Yeb. 



The insects are usually found at the bottom of the stack. 

 Figure 93 shows the insect in its various stages, 1 and 2 

 represent the larva, 3 the cocoon, 4 the pupa, 5 and 6 the 

 moth, and 7 the white web in which the worm for the 

 most part lives. The moth is one of our prettiest 

 species, being of a reddish-brown color with golden-yellow 

 markings and fringe to its wings. It is suggested as a 

 preventive, that hay containing clover should not be 

 stacked twice in the same place, and that the stack should 

 be placed upon log or other foundations, that will allow 

 of thorough ventilation from below. 



