tGF.iiiii) t. — ritoi Hii.ii M. 137 



Genus XXIX. — Tro( iihhm, Sinpoli. 



Antennae short, more or less serrated, especially in the males, stout, gradually 

 incrassated nearly to the apex, which is curved, acuminated, and terminates 

 in a hairy tuft: palpi moderately long, parallel, suddenly recurved, the base 

 very hairy, the apex scaly and attenuated : head small : dypeus densely clothed 

 with elongate hairs: fhnmx and abdomen stout, the latter with a very small 

 tuft at its apex : wings with the tips not clothed transversely with scales. 



Notwithstanding the great resemblance between this genus and 

 the following, their characters are sufficiently distinct to warrant their 

 separation : the present genus is composed of much larger insects 

 than yEgeria, and they are distinguished by their remarkably short 

 tongue; short, incrassated, and slightly serrated antennae: robust 

 body ; small head, with a hairy crest ; and by the transjiarencv of 

 the apex of the anterior wings. They also differ in habit, the in- 

 sects of the present genus being very sluggish, usually remaining 

 quietly at rest on trunks, and when urged to flight, flying very 

 heavily ; thus and by their abbreviated maxilla? approaching in 

 habit to the Bombycidse : whence 1 presume the genus would more 

 naturally follow than precede ^^geria, though I have not ventured 

 to adopt that arrangement. 



Sp. 1. Apiformis. Capite JIavo, thorace nigro viaculis quatuor flavi.i, ubJomine 

 flavo cingulis diiabus nigris. (Exp. alar. 1 unc. 7 — 10 lin.) 



Sp. Apiformis. Linn'. — Don. i. ph 25. — Tr. Apiformis. Steph. Catal. 



Head yellow ; a white line before, and a yellow one behind, the eyes : palpi 

 vellow, dull at the tip: antcnme above dusky-black, beneath ferruginous: 

 thorax dusky-black, with two large trigonate lateral spots anteriorly, and two 

 smaller ones posteriorly : abdomen yellow, with the first and fourth segments 

 dusky-black, the remainder with the margins above black, the fifth and two 

 hinder dusky on the back, with a lateral brownish line: femora outwardly 

 yellow, inwardly dusky-black : tibiae rich tawny-orange; tarsi paler: anterior 

 wings sprinkled with brownish, the base with a yellow spot, the nervures, 

 margins, and a transverse band rusty-brown ; beneath with the band and 

 margins paler; the anterior yellowish at the base: posterior also sprinkled 

 with brownish, with the margins and nervures brown, beneath concolorous. 

 with the anterior margin fulvous; all the fringe tawny-brown. Male less, 

 the abdomen more slender, the tuft more distinct: the antcnmr .slightly ser- 

 rated internally. 



Caterpillar whitish, with an obscure dorsal line; head large, 1 rown: it fe.xU in 

 the trunks and the roots of the poplar ( Popuhs niger), and asptn ( Pojndns 

 tremula). Chrysalis elongate, brown. 

 Hai'stfii ATA. Noi.. I. 30iji Jl'm:. IS'^S. r 



