£4 SECOND ANNUAL REPORT OF 



and in that of the hind wings being less distinct, more double, and 

 extending to the outer angle. 



The larva is said by Dr. Fitch to so much resemble that of the 

 preceding species that "we as yet know not whether there are any 

 marks whereby they can be distinguished from each other." (Report 

 Fte- 57 -J 3, § 124.) The moth is more common 



with us than its larger ally, and though 

 I have never bred it from the larva, 

 yet I have often met with a worm 

 (Fig 57, «,) which there is every rea- 

 son to believe, belongs to this species, 

 and which is easily recognized from the preceding. It never grows 

 to be quite so large as the other, and may readily be distinguished by 

 its more decided bluish cast ; by having but four light and four dark 

 stripes to each segment (Fig. 57, 5,) ; by having no orange band across 

 the middle segments, and by the spots, with the exception of two on 

 the back placed in the middle light band, being almost obsolete. The 

 head, shield on the 1st segment, hump on the 11th, and a band on the 

 12th, are orange, spotted with black, the hump being marked as at 

 Figure 57, c. Venter orange, becoming dusky towards head ; feet and 

 legs also orange, with blackish extremities, and with spots on their 

 outside at base. 



The worm works for the most part in the terminal buds of the 

 vine, drawing the leaves together by a weak silken thread, and 

 cankering them. It forms a simple earthen cocoon, or frequently 

 bores into a piece of old wood, and changes to chrysalis, which aver- 

 ages but 0.36 inch in length ; this chrysalis is reddish-brown, covered 

 on the back with rows of very minute teeth, with the tip of the abdo- 

 men truncated, and terminating above in a thick blunt spine each side. 

 From the above accounts it is hoped that the reader will have no 

 difficulty in distinguishing between these three blue caterpillars of 

 the Grape-vine. But, says the practical grape-grower, "what does it 

 concern me to know whether the little blue varmints that are defoli- 

 ating my vines, belong to this species or to that? All I wish to know 

 is how to get rid of them, and as they are all three so nearly alike, 

 the remedy applied to one must be equally effectual with the others." 

 Gently, dear reader ; it may prove of considerable importance that 

 you know which particular species infests your vines ! If, for instance, 

 a person living in the West should find the larvas of the Beautiful 

 Wood Nymph, then he need feel no alarm ; while if a person living in 

 the East should find that of the Pearl Wood Nymph, he may in like 

 manner put his hands in his pockets and go his way with an easy 

 mind ; for neither of these species are likely to become troublesome 

 in those respective sections of the country, since heretofore they have 

 always been quite rare in those parts. Again, the larvse of the two 

 Wood Nymphs have a fondness for boring into old pieces of wood, to 

 transform to the chrysalis state, and Mr. T. B. Ashton,of White Creek, 



