92 ENTOMOLOGICAL SOCIETY 
in his paper entitled " Some Ichneumon Parasites of New England Butter- 
flies," and has since been considered as a parasite of the White Mountain 
butterfly (Chionobas semtdea}. Recently, however, the type specimen 
has come temporarily into my possession through Mr. Scudder, and I find 
that the only authority for such consideration is the old label which reads : 
" Found alive in an old chrysalis case of semtdea." An additional label 
credits the collecting to Mr. Sanborn. Study of the specimen shows that 
the species belongs to the chalcostomus group of the genus Encyrtus, ap- 
proaching very closely to E. lunatus Dal. It has no connection with 
E. sivederi Dal. with which Dr. Packard compares it, and which belongs 
to Comys. All of the r.halcostomus group, including lunatus, are parasites 
of Coccidse, the only exceptions being barbarus and Rogenkoferi, the 
habits of which are not known. Moreover all are parasites of the genus 
Lecanium. No true Encyrtus is known in Europe to have been bred from 
a Lepidopteron, and no species of the subfamily Encyrtinse from any di- 
urnal. Encyrtus bucculatricis How. is the only American exception to the 
former rule. 
From these facts it seems to me extremely improbable that E. montimis 
is a parasite of C. semtdea, but rather that the occurrence of the type speci- 
men in the old empty chrysalis case was entirely an accident, and that it 
had issued in all probability from some neighboring Lecanium. The type 
specimen is a female and not a male as stated by Dr. Packard. 
Mr. Smith spoke on the structural features of the Sphingidas. 
He compared the general type of genital structure with that of 
other families, finding here a universal existence of a peculiar 
supra-anal process, which takes on more or less of a claw-like 
form, very different from the ordinary simple curved hook of 
most families, or even the double hooks of some Bombycids. He 
showed a tendency to abnormity in certain species and a curious 
lack of agreement in other details of genital structure in species 
of the same genus. 
The peculiar structure of Dilophonota was explained. Here 
there are two superior plates, both furcate, but the curvature of 
the forks are not coincident. Several other features of genital 
structure were pointed out, and drawings of these structures in 
nearly all the American species were exhibited. 
The armature of the tarsi in some of the genera was discussed 
and explained, as well as the peculiarities of the venation of the 
family. The classification of the Macroglos since was briefly touched 
on, as was the relationship of the family with some Bombycid fami- 
lies. Mr. Smith thinks that there are two distinct leads into or from 
the Bombycids, the Smerinthince being more closely related to the 
