64 MONOGRAPHIA 



Docopliorus atratus. Nitzsch. Germ. Mag. iii. p. 920. Burmeist Hand- 

 buch Entom. vol. ii. pt. ii. p 4-24. Sj>e. 5. Step. Cat. pt. ii. p. 380. 

 Pulex Corvi. Recli Exp. pl.xvi. Fediculus Corvi. Linn. Syst. Nat. 

 ii. 1018-14. Faun. Suec. 1050. Stew. Ele. Nat. Hist. ii. 279. Turt.iii. 

 696. Fab. Syst. Ent. 806. 13. Fab. Faun. Groen. 217. n. 185. Mull, 

 prodr. 2190. Faun Frid. 806. Fugle-Laus. Bohn. v. 181. The Louse 

 of the Crow, Albin. sp.pl. xlviii. fig. sup. Shaw Gen. Zool. vi. pi. 119. 

 fig. supr. Groenl. Tullukab. Koina. 



Milky white, shining, and hairy ; head large, elongate, 

 triangular, the anterior part with a deep fuscous, sub-rhom- 

 boidal depression ; two black diagonal fascia extending 

 from the anterior part to the occiput; eyes small, 

 black, and prominent ; trabeculge very large, sub-conical, 

 obtusely truncate ; antennae with the first and second joints 

 the largest, the three terminal cylindrical and equal ; pro- 

 thorax transverse, very narrow ; metathorax large, the 

 width of the head, acutely angular behind, both with a 

 broad black margin ; abdomen large, oval, segments nearly 

 equal, each, except the penultimate, with an acutely tri- 

 angular lateral patch on each side, of a deep fuscous yellow, 

 or dark chestnut, margined internally with black ; the 

 sutures of the abdomen and posterior margin of the thorax 

 fringed with white hairs : legs long and thick ; tibia, with a 

 black line on the external edge, terminating at the apex 

 transversely ; anterior femur with a black band at the apex ; 

 four posterior with two bands. Length 1 . 



This species, which is perhaps the best known, is very 

 common on the Rook (Corvus frugilegus); from which bird 

 it has been communicated from Cambridgeshire by the 

 Rev. L. Jenyns ; and from Belfast by W. Thompson, Esq. ; 

 from Northumberland, taken on the Hooded Crow (Corvus 

 comix), by P. J. Selby, Esq. The lateral patches are oc- 

 casionally all black. 



