DESCRIPTIONS OF LARViE 



MEMORANDA OP THEIR METAMORPHOSES, 

 HABITS, ETC. 



nlliod sDCcies found abundantly on Ambrosia elahor, July 30, 184o. iney 

 it eonrenmersuvfaceof tJ and devour the cuticle and paven- 



chLaa abov, leaving the lower cuticle untouched. They ^^f^f^^ 

 heu- motions and relt extended longitudinally along the nbs of the lea.e^^ 

 They are of a dirty, yellowish white color, blotched at the su es around the 

 upper ow of latL.l tubercles, and in two rows along the back w.th 

 irbistre black. The head is wax yellow, the last jo.nt of the legs .s 

 black, and there is a black spot on the anterior side of 

 the coxa.. They have six legs and an anal proleg^ The ^^^||||§fc 

 body is somewhat flattened, or broader than thick, and ^t^^^^^^^^^ 

 tapers at each end. On each segment there are two ^.^ 33 



lateral, papillose tubercles, one above and the other be- 



;;;;;' piracle, and on the back each segment has two transve^se^^^^^^^ 

 beset with minute tubercles. All the tubercles are setiferou. Ihe b 1 s 

 are wliitish, and come out double, being apparently nm ted a^d si, lit > 

 enlarged at the tip, so as to form a loop conspicuous at this part. Length 

 one fourth inch. 



Haltica alni Harr. mss. „ 



I. travelling from Centre Harbor, N. H., to Conway, on the second of 

 Au^st, 1804, and fronr Conway to Upper Bartlett, and sntaeqnontly to 

 Jaclson, I saw the alder, ^Alnus s.rraHa) everywhere ravaged by .n-o« 

 wldeh had destroyed their leaves In the manner of canker woim . Upon 

 :^1 nation the spoilers were found not to be all d,spersed, and scvetal 



