NORTHUMBERLAND AND DURHAM. 37 



The dark varieties occur principally in shady fir plantations, 

 and the hill specimens are somewhat larger than those of the 

 lowlands. 



3. 0. piLicoRNis, Faylz, 



Qteph. Illust, Ifand., v., 254. — Erichson, Gen, et Spec. 

 Staph., 296. — Staphylinus pilicornis, Gyll. Ins. Suec, 

 ii., 359. — 0. alternans, Steph. Illust, Mand., v., 254. — 

 0. glabricornis, Kirly, Steph., I. c. 

 Under bark of trees, especially pines. " Twizell." — P. J, 

 Selby, Esq. Whitsunbank Hill, Greencroft, Gosforth, Ravens- 

 worth ; and once from the sea-coast, at Marsden. February — 

 November. 



124. Xantholinus, Dahl. 



1. X. FULGiDUS, Fah. 



Erichson, Gen. et Spec. Staph., 319. — Steph. Manual, No. 

 3206. — Staphylinus pyropterus, Gyll. Ins. Suec, ii., 

 356. — Gyrohypnus pyropterus, Steph. Illust., Mand., v., 

 258. 

 Rare. Tyneside, and Long Benton, in May. — T. J. B. 



2. X. GLABRATUS, Grav. 



Erichson, Gen. et Spec. Staph., 319.— Steph. Manual, No. 

 3207. — Gyrohypnus cruentatus, Steph. Illust., Mand., v., 

 260. 

 Common. Twizell, Long Benton, Shields, Marsden, Hartle- 

 pool, &c. April — October. 



Monstrous individuals occasionally occur, with the punctures 

 of the head and thorax nearly effaced, and the surface much dis- 

 figured. These are usually found under heaps of rubbish, and 

 appear to have acquired this malformation while the imago was 

 in a soft, compressible state, and not free to arrive at its full 

 development. 



3. X. PUNCTULATUS, Payh. 



Erichson, Gen. et Spec. Staph., 328. — Steph. Manual, No. 

 3209. — Staphylinus punctulatus, Gyll. Ins. Suec, ii., 

 353. — Gyrohypnus punctulatus, Steph. Illust, Mand., v., 

 263. 



