44 HAUSTELLATA. — LEPIDOPTERA. 



and hairy : thorax stx)ut and hairy : abdomen abbreviated, tufted in the male, 

 and pilose laterally in both sexes, the female without a downy mass at the 

 apex : wings entire, elongate, acute, subdiaphanous, not reversed during repose: 

 legs with i\ve femora and tihice pilose. Larva slightly hairy, a little depressed, 

 maculated, not gregarious : pupa short, obtuse, enclosed in a silken follicvdus, 

 superficially subterranean. 



The same principles which authorize the disunion of the insects 

 comprised in the genus Lasiocampa of Schrank, or the separation 

 of Trichiura from Clisiocampa, justify the establishment of this 

 genus, as it differs from Eriogaster in habit and structure, as much 

 as Clisiocampa does from Lasiocampa; the males have their an- 

 teunse more densely pectinated and stouter than in Eriogaster, and 

 the females are destitute of the woolly apex to their abdomen ; thus 

 also differing from those of Cnethocampa, which, with the following 

 genus, resembles them in the texture of their wings. Larva soli- 

 tary : pupa obtuse : eggs naked. 



Sp. 1. PopuU. Fusca, thorace antice pallida, alis fuscescentibus, striga sesqiii- 

 altera repandd albCi, anticis basi pallide brunneis. (Exp. alar. $ 1 unc. 3 — 5 

 lin. : ? 1 unc. 2—8 lin.) 



Ph. Bo. Populi. Linne.—Don. ix. pL 307. $.— Pee. Popuh. Steph. Catal. 

 No. 3993. 



Thorax dusky or black, anteriorly pale griseous, or castaneous : anterior wings 

 fuscescent, with the base, and a slender dash on the inner margin, castaneous- 

 brown ; an incurved pale striga near the base, not reaching to the inner mar- 

 gin, and a second undulated and more distinct one behind the middle : cilia 

 fuscous, spotted with griseous : posterior wings with an oblique pale striga : 

 abdomen fuscous, or tawny brown. Female similar. 



Caterpillar cinereous, darker and varied on the back, with two pair of reddish 

 dots on each segment ; it varies much : and feeds on oak, aspen, birch, poplar, 

 lime, whitethorn, rose, and fruit trees, and is found in June ; changes in a 

 silken foUiculus in the earth : pupa anteriorly brown, posteriorly reddish : the 

 imago appears in December. 



Not common, found in the lanes about Darenth, Birch, and 

 Coombe woods, and near Hertford. " Near Leatherhead." — W, 

 Raddon, Esq. " Coleshill."— l^c-t;. W. T. Bree. " Rare near York." 

 — W. C. Hewitson, Esq. " Ongar-park." — Mr. H. Doubleday. 



Genus LIIL — Eriogaster, Germar. 



Palpi short, distinctly triarticulate, the basal joint longest and stoutest, the ter- 

 minal minute, ovate, subacute; maxilla; obsolete. Antennce bipectinated in 

 the males, the pectinations decreasing in length to the apex, slightly serrated 

 in the females: head small, pilose: thorax very stout, pilose above and below: 



