BOMBYCin>E. LASIOCAMPA. 41 



Male with the radii of the antennse, thorax, abdomen, and wings very deep chest- 

 nut-brown j the latter with a broad yeUow fascia, arcuated and margined 

 abruptly interiorly, rather shaded off towards the hinder margin, which has a 

 broad chestnut-brown fimbria : the anterior wings have a central white spot, 

 usually triangular, and a conspicuous yellow patch (as particularly mentioned 

 by Linne) at the base : the anterior wings have brown cilia, the posterior yel- 

 lowish mixed with brown. Female larger, similarly marked, but much paler, 

 being in general of a luteous colour, with the hinder margins of aU the wings 

 palest. Both sexes vary considerably in colour. 



Caterpillar oclu-aceous, with black rings, and obhque white streaks on the sides : 

 it feeds on the ash, birch, sloe, willow, oak, hornbeam, whitethorn, and broom, 

 and is found in June and July : cocoon dusky : imago appears in August. 



Rare near London ; but very abundant in the New-forest and 

 in Devonshire, &c. " Common near Barnstaple." — If. Raddon, 

 Esq. " Near Dublin, not iinfrequent." — N. A. Vigors, Esq. 



Sp. 5. Roboris? AUs maris brunneis, Jceminw luteis, fascia suharcuatd pone 

 medium, anticis puncto-subrotundato albo. (Exp. alar. $ 2 unc. 6 — lOlin. : 

 o 2 unc. 10 hn. — 3 unc. 4 lin.) 



La. Roboris? Schrank.—Vh.. Bo. Quercus. Don. iv. pi 104./ 1. $ f,2^}~ 

 Steph. Catal. No. 5990. 



Similar to the last, but paler : the anterior wings without the yellow patch at the 

 base ; the central white spot generally rounded, the yeUow fascia more dilated, 

 and straighter internally ; the hinder margin of the posterior wings with a 

 very narrow brown fimbria ; the cilia immaculate yeUow or luteous. Female 

 luteous, as in the last, but stouter, with comparatively broader and rounder 

 wings and straighter yellowish fasciae. This insect also varies much in colom*. 



Caterpillar luteous, with black rings, an interrupted row of white spots on the 

 back, and oblique white and luteous streaks on the sides : cocoon luteous. 



Are this and the preceding insect truly distinct } they certainly differ consider- 

 ably in their larva, and also in their intermediate and final states; and 

 from the circmnstance of the present insect abounding so greatly in the vicinity 



•j- Sp. 6. Dumeti. AUs fuscescentibus anticis puncto, fascia marginegue postico 



luteis. (Exp. alar. 2 unc. 6 — 10 Hn.) 

 Ph. Bo. Dumeti. Linne. — Twr^ora (!)— La.? Dumeti. Steph. Catal. No. 5991 . 



Antennae yellowish : head and thorax luteous, abdomen dusky : wings fuscous, 

 with a luteous anteriorly repanded fascia and posterior luteous margin : the 

 anterior with a subtrigonal luteous spot before the fascia. 



Caterpillar brown, with yellow dots and black transverse spots : it feeds on let- 

 tuce, dandelion, &c. : changes to a subterranean pupa. Said by Stewart to 

 inhabit Britain; but I suspect without sufficient authority. It probably be- 

 longs to another genus, as its habit appears somewhat different from the true 

 Lasiocampae. 



