On the Antennce and Trophi of Lepidopterous Larvae. 15 



tioned, and shall refer to again. It does not belong to this group- 

 Of Bucculatrix the larvae of only two species are known in this country, 

 and I have not examined the trophi of either of them. The pupa re- 

 sembles closely that of a Lithocolletis of the cylindrical group, and 

 the imago also seems to me to be allied to that genus. The arma- 

 ture of the head and anal segment in the pupae is identical with that 

 of Lithocolletis. Mr. Stainton says (Ins. Brit., v. 3, p. 290): "At a 

 certain age the larvae quits the mine, and on the underside of the leaf 

 spins a delicate, whitish web or cocoon, within which the larvae remains 

 motionless, and in a horse-shoe shape, for a considerable time; it then 

 emerges from tins coccoon totally different in appearance to what it was 

 as a leaf-miner, and proceeds to eat the epidermis of the leaf which it 

 formerly mined." All of this would suggest forcibly that at this moult 

 in its cocoon it had exchanged the trophi of the first form for those 

 of the ordinarv form. But this can not be, for the reason that a larva 

 having the first form of trophi can neither spin, nor crawl, when it is 

 out of its mine, because of the rudimentary condition of its spin- 

 neret and feet at that time. If, therefore, the larvae of Bxiccalatrix 

 ever has trophi of the first form, as I believe it will be found to 

 have in its first stage, it must shed them at its first moult before it 

 leaves the mine, and the moult in its cocoon must be its second or some 

 later moult. Its larval history will be interesting to trace, and it will 

 probably be found that in its early stages it is like that of Gracillaria 

 stigmatella, and many other Gracillaria which have the first form of 

 trophi in their first stage only, and pass both the first and second 

 stages in the mine. Bucculatrix (imago) has no palpi. Both of my 

 American genera, Eurynome and Phyllonome, are evidently closely 

 allied to Bucculatrix, especially the latter, which resembles Buccula- 

 trix even in the ornamentation, and may almost be called a Bucculatrix, 

 plus both pairs of the palpi. Eurynome also has the palpi, and this I 

 * think is another instance showing how closety related species may 

 differ in respect to the development of these organs. These are the 

 only American genera that I place in this larval group, though doubt- 

 less other exotic genera are known which properly belong here. 



The next larval group is characterized by never at any stage having 

 the first form of trophi, and it includes all other Macro and Micro 

 Lepidoptera than those above mentioned, and some Tineid genera, yet 

 to be discussed, and it may be divided into three such groups, accord- 

 ing to the armature of the labium. The first of these subgroups has 

 the labrum armed with twelve spines, and includes all Macro and 



