(; fiOVl9IQr 



^ ass 



causing it to curve greatly, while the upper cuticle remains 

 smooth. Its mine also is deep, and all the mines of this 

 group are deeper and more decidedly tentiform than those of 

 the flat group, as is necessary because of the more cylindri- 

 cal form and larger legs of the larvae, and especially because the 

 flat larva only needs its tent to spin its cocoon in, while the 

 larvse of this group continue to feed and grow in the mines. 

 L. caryaealhella, however, which pupates in an oval cocoon of 

 silk mixed with frass, makes a single fold, like that of a flat 

 larva, but larger, so that the tent has a higher ceiling. 



The most singular mode of pupation that I have observed is 

 found in the two closely allied species L. ambrosiaeella Cham, 

 and L. helianthivorella Cham. These pupate in a fusiform silken 

 cocoon suspended by a silken rope like a hammock in the mine, 

 which is like that of L. crataegella. The larvae spin the rope 

 thi-ough the middle of the mine, and then, lying on it, carry 

 their threads to and fro, over and around themselves, until they 

 are completely enclosed. (The moths of these two species have 

 one of the branches of the median veins of the fore wings fur- 

 cate on the dorsal margin of the wing, thus differing from the 

 usual neuration of the genus.) Some other species simply spin 

 a few silken threads, on which they lie, or at most make but a 

 very slight web. This is the habit of L. desmodiella Clem., 

 which is the smallest species of the genus, and which has one 

 fewer marginal veins in the fore wings than is usual in the genus. 



As before stated, in the latter part of the last larval state, and 

 in the pupal state, the groups are indistinguishable, except by the 

 green color of jL. ornatella, which gradually disappears, and then 

 the pupae are indistinguishable. The moths cannot be divided 

 into groups having any connection with the larval characters. 



It will be seen that on more attentive study of the larvae of a 

 greater number of species I have found it necessary to modify 

 some of the statements in my former paper (Psyche, v. 2, p. 

 82-87). All the larvae of the flat group pass through the form 

 given in fig. 3, and that form is only one condition of the larval 

 stage through which the larvae pass, in the gradual change to 

 the pupa state, which takes place in that stage. 



V. T. Chambei's. 



