168 



HAUSTELLATA. LEPIDOPTERA. 



sionally needful) substitution of sectional divisions*. I shall merely 

 add, that Dypterygia may be at once distinguished from the three 

 following genera, by its highly crested thorax, slender, nearly 

 vertical palpi, with the terminal joint considerably exposed, and 

 when denuded elongate-linear subacute ; abbreviated subtriangular- 

 ovate tristigmatiferous anterior wings, and other less obvious cha- 

 racters ; exclusively of its dissimilarity in the larva and pupa states. 



Sp. 1. Pinastri. Alls anticis nigris, margine posteriori anguloque ani cinereo- 



fuscis. (Exp. alar. I unc. 5—6 lin.) 

 Ph. No. Pinastri. Linn/'. Bon. x. pi. 34>7.f. 2.— Dy. Pinastri. Steph. Catal. 



part ii. jD. 77. No. 6175. 



Head and thorax deep black, the crest on the latter tipped with deep ashy-brown ; 

 anterior wings also black, with the edges of the stigmata of a deeper hue, the 

 costa with a few fuscous streaks, and with a few white dots near the tip, the 

 inner margin ashy-brown, uniting to a large undulated spot of a similar hue, 

 with darker longitudinal streaks at the anal angle, and resembling an expanded 

 bird's wing, the apex pointing towards the hinder margin ; this spot is bounded 

 towards the base of the wing with black, and a longitudinal streak of that 

 colour is placed in the centre of each arcolet of the wing at the apex, between 

 it and the costa, near the latter is a pale rusty-ash cloud ; cilia with ashy 

 streaks: posterior wings fuscous with cinereous cilia: abdomen pale fuscous. 



Caterpillar dirty-brown, sprinkled with deeper spots, with two paler longitudinal 

 lines and some dusky oblique ones: it feeds on the Rumex acetosa and R. 

 acetosella: the pupa is dirty brown, placed in a soft folliculus on the surface: 

 — the imago is produced in June. 



Not a common species : I have twice found the insect on palings 

 near Coombe-wood, and possess a specimen captured at Brick-wood. 

 " Near Norwich."— C M. Curtis, Esq. " Newington Green."— 

 Mr. Bentleij. 



Genus CIV. — Xylina. 



Palpi short, nearly horizontal, rather slender, triarticulate, densely clothed with 

 compressed scales; the terminal joint more or less exposed, elongate-ovate, 



* That the genera in this work are not in all instances carried to the greatest 

 extent, may be judged from the fact, that writers who have simultaneously 

 passed over the same ground, have so far corroborated my vieAvs as to propose 

 several of the genera which I have adopted, and to subdivide others ; ex gr. Dr. 

 Horsfield divides the Polyommati by the addition of the genus Pithecops (to 

 include Po. Argiolus, v. i. p. 85): — Boisduval has Orthorinia for Ptilodontis, 

 Asteroscopus for Petasia, Euchelia for Deiopeia, &c. : — De Jean divides Sphodrus 

 into Sphodrus and Pristonychus ; and Mr. Kirby has recently divided the genus 

 Dyticus into two, caUing those species which have the elytra smooth in both 

 sexes Leionotus. 



