STERCORARIUS POMATORHINUS, POMARINE JAEGER. 607 



The first distinctive name was proposed by Brisson in 1760. This has as type the 

 S. parasitica, and may include all the species of the subfamily excepting Buphayus skua. 

 I accept and employ it exactly as it was constituted by its author. Lestris, Illiger 

 (1811); Pr(Edatrix,\ itiiWot (1816); ia&&«s, Rafinesqne (1816); and Coprotherts, Reicheu- 

 bach (1850), are all based upon species of the subgenus as here restricted, and are there- 

 fore synonymous with, and must be superseded by, Stercorarius. Catharracia, Briin- 

 nich, has already been treated of. By Liunajus, Gmelin, and Latham the species were 

 arranged under Larus, which thus becomes a partial synonym. 



STERCOEARIUS POMATOEHDs^US, (Temm.) Yieill. 

 The Pomarine Jaeger, 



stercorarius siriatus, Briss., Oru. vi, 1760, 152, pi. 13, f. 2 (juv.). 



Lestris siriatus, Eytox, Cat. Br. B. 1836, 51. 



Larus parasiticus, Meyer, Tasch. Deutsch. ii, 1810, 490 ; not of authors. 



(?) Larus crepidatus, Gjr., Syst. Nat. i, 1788, 602.— Lath., Ind. Oru. ii, 1790, 819 (juv.). 



Lestris pomarinus, Temm., Man. 1815, 514 ; ii, 1820, 793 ; iv, 1840, 495. — Faber, Prod. Isl. 

 Oru. 1822, 104.— BoiE, Isis, 1822, 562.— Brehm, Eur. Vog, 1823,. 741.— Bp., Syn. 

 1828, Xo. 305 ; List, 1838, 63.— Less., Man. ii, 1828, 388.— Kaup, Sk. Ent. Eur. 

 Thierw. 1829, 64.— Sw. & Rich., F. B. A. ii, 1831, 429.— Nutt., Man. ii, 1834, 

 315.— AuD., Orn. Biog. iii, 1835, 396; Syn. 1839, 332; B. Am. vii, 1844, 186, pi. 

 451.— Keys. & Blas., Wirb. E.ur. 1840, 240.— ScniNZ, Eur. Fn. i, 1840, 388.— 

 Naum., V. D. X, 1840, 470, pi. 270.— Bp., Cat. Met. Ucc. 1842, 80 ; Rev. Crit. 18.50, 

 202.— ScHL., Rev. Crit. 1844, 84 ; Mus. Pays-Bas, iv, 1865, 47.— DeKay, N. Y. 

 Zool. ii, 1844, 316, pi. 133, f. 292.— GiR., B. L. I. 1844, — .— Tiiomp.. Nat. Hist. 

 Irel. iii, 1851, 392. — Midd., Sib. Reise, ii, 1853, 240.— Bp., Consp. Av. ii, 1856, 

 207.— Des Murs, Traits d'Ool. 1860, .551.— Blas., List B. Eur. 1862, 23 (subge- 

 nus Coj>rof7ie?-es).— Newt., P. Z. S. 1861, 401 (eggs). 



Stercorarius pomarinus, Vieiel., Nouv. Diet. d'Hist. Nat. sxxii, 1819, 158; Fn. Frang. 

 1828, 387.— Selys-L., Fn. Belg. 1842, 155.— Degl., Orn. Eur. ii, 1849, 291.— 

 Gray, Gen. of B. iii, 1849, 652 ; List Br. B. 1863, 227.— Lawr., B. N. A. 1858, 

 838.— Reinii., Ibis, iii, 1861, 16.— Coues, Pr. Phila. Acad. 1861. 243 ; ibid. 1863, 

 129.— Boardm., Pr. Best. Soc. ix, 1862, 130.— Verr., Pr. Ess. Inst, iii, 180'., 160.— 

 Aleen, ibid, iv, 1864, 90.— Coues, ibid, v, 1868, 305.— Turnb., B. E. Pa. 1869, 47. 



Cataractcs jfomarinus, Steph., G. Z. xiii, 1826, 216, pi. 24. — Macgil., JMan. ii, 1842, 256. 



Coprotheres jMinarinus, Reich., Syst. Av. 1850, 52. — Bp., Comp. Rend, xlii, 1856, 770. — 

 Blas., J. f. O. 1865, 384. 



Stercorarius pomatorhinus, Newt., Ibis, 1865, 509. — Lawr., Ann. Lvc. N. Y. viii, 18G6, 

 298.— Coles, Key, 1872, 309.— Coues, Elliot:s Prybilov Islands, 1874, p. — . 



Catarractes parasita var. camtschatica. Pall., Zoog. R.-A. ii, 1811, 312. 



Lestris sphariuros, Brehm, V. D. 1831, 718. 



DiAG. S. tarsis postich aspeirimis ; rcctricibus mediis laiis in apices i^jsas, ultra cocltras 4 

 polUcea pori-ectis. 



Hob. — Seas and sea-coasts of Europe, Asia, and America. Interior of North America. 



Adult, breeding plumage (No. 23215, Smithsonian Museum). — Bill shorter than the 

 head, or three-fourths the tarsus, about two and one-half times its own height at the 

 ba.se ; width about the same as the height ; horn-colored, growing blaclv at the tip. Feet 

 black. Tail soiuewhat less than half the win<;. First primary but little surpassjiig 

 the second. Occiput subcrested. Feathers of the neck rather rigid and acuminai'e, 

 their librilkc di.sconuected. Caudal feathers, including the central, broad quite to theit 

 tips, which are truncated, the rhat'his i)rojecting as a small mucro. The central pair 

 project about 3 inches ; are broad to near tlie tip, where they form an angle of 4.)- 

 witli thr rliacliis. Their lilirilia^ exceedingly long (2.| inches), while those of the lateral 

 feathers are only If. Tail slightly graduated. Inferior tectriees reach within A inch 

 of end of tail. Tibiie bare for J of an inch, scutelhite for A iucii. Tarsi very rough ; 

 anteriorly covered with a singicj row of scutella, exeei)t toward the tiliio-tarsal articu- 

 lation, wliere these scutella gradually degenerate into snuill, irregular polygonal plates, 

 with which the whole of th(>, rest of the tarsus is reticulated. Tlu-se j)lates are larges-t 

 on the sides of the tarsus externally; on the heel-joint, and posterior aspect of the 

 tarsus generally, they become raised into small conical pyramids, acutely pciuted. Tho 

 scutella of the anterior poition of tlii^ tarsus is contiimous witii tlie superior surface of 

 the toes, wliih' tlie polygonal reticulation occupies Imtli surfaces of tin; wcNs, and tho 

 inferior surface of the toes. Hallux extremely short, its nail stout, conical at the base, 

 acute, little curved. Anterior claws all very strong and sharp; inner most so ; the 

 middle expanded on its inferior edge, not serrated. Webs broad, full, uuiuciaed, their 

 free margins a little convex. 



