41 



those as doubtful, of which I possess but a partial knowledge of 

 that state. 



Natural Order — Bomhyces. Has an elongate cylindrical downy 

 larva, which rolls itself into a ring when touched ; the pupa 

 changes in a close gummy oval cocoon, remarkably small for the 

 size of the imago. Among the exotic species of Lasciocampa, 

 we find in the males particularly slender bodies, expansive wdngs, 

 the inferior grooved to receive the abdomen, and diurnal flight, 

 all of them characters so indicative of an approach to Papilio, that 

 we scarcely hesitate a moment in assigning it the approaching 

 station, not but I expect fully that time will eventually furnish 

 us with a connexion on each side yet more conclusive.* The 

 second genus of Bombyces is probably Odenestis, and the thu*d 

 Gastropacha, whose prominent and elongated palpi appear to point 

 out an approach toward a tribe of insects with the same peculi- 

 arity, of which there are several to be found in the following 

 order : 



Natural Order— Coss/. The larva is depressed; naked, except 

 a very few scattered hairs ; has sixteen feet ; lives through one 

 or more winters ; never rolls itself in a ring when touched ; feeds 

 on the solid interior woody parts of vegetables. The pupa gene- 

 rally changes in a tough oval cocoon, interwoven with particles 

 of its food. It has a double ring of raised denticulations of each 

 segment of the abdomen, by means of which it is endowed with a 

 considerable power of locomotion. The genus Zeuzera is very 

 near the point of contact with the Bombyces. In Zeuzera there 

 is much resemblance to the antennas of Gastropacha. One 

 genus, or group of genera, I expect will prove to be Stygia, a 

 native of New-Holland. A second, at the point of contact with 

 Sesia in Sphinx, must be yEgeria ; thus retaining its place among 



823 Callimorpba. 4 Lithosiae. 



824 Deiopeia . . 



825 Lithosia. . . 



826 Nudaria. . . 



827 Psyche . . . 



828 Heterogena 



4 Lithosiae. 

 4 Lithosiae. 

 Sub-cl. Phryganea. 

 Sub-cl. Phryganea. 

 Order uncertain. 



829 Limacodcs . Order uncertain. 

 854 Acronycta . 5 Arctiae. 



942 Platyptery'x . 3 Notodontae. 



943 Drepana . . 3 Notodontas. 



944 Cilix .... 3 Notodontae. 



* See a Papilio with the antennae of a Lasciocampa, Drury, Vol. III. pi. 



D 



