308 GEOTHLYPIS — OPORORNIS AGILIS 



Genus GEOTHLYPIS Cabanis 



TriChas, Sw. Zool. Journ. iii. April-July, 1827, 1G7 (not of Gloger, March, 1827, = Criniger 



Temm., fide Cabanis). Type Turdus trichas L. 

 Geotblypis, Cab. "Arch. f. Naturg. 1847, Bd. i. 316, 349". Same type.— Sd. BNA. 1858, 



240. — Bd. Rev. AB. 18C."), 219 (review of genus; nine species). — Eidgw. Am. Jonm. 



Sci. 1872, 457 (monographic ; five species and twelve varieties).— /SaJ». Ibis, 1872, 



147 (eight species and three varieties). 



Chars. — Bill of ordinary Sylvicoline characters ; rictal bris- 

 tles very slight. Wings remarkably short and much rounded, 

 scarcely or not longer than the rounded tail. Legs stout ; tarsi 

 longer than the middle toe. Of medium and rather small size 

 for this family. Coloration olivaceous above, with yellow below. 

 Tail without white spots. Legs pale-colored. Habits somewhat 

 terrestrial. Nest on the ground or near it. 



This genus affords a considerable number of species more or 

 less resembling the common Maryland Yellow-throat, chiefly of 

 the warmer parts of America — three of them, however, are 

 North American, and two occur in the Colorado watershed. 

 They are well distinguished from other Warblers by the extreme 

 shortness of the wings, which are scarcely or not longer than 

 the head, and by the size of the pale-colored legs, which indi- 

 cates somewhat terrestrial habits. Uur species are familiar 

 inhabitants of the shrubbery, ordinarily keeping near the 

 ground, where the nest is usually placed. 



Oporornis is the most closely related genus, distinguished 

 mainly by the greater length of the pointed wings, which are 

 much longer than the tail. This type is represented by only 

 two known species, neither of which occurs in the region under 

 consideration.* 



* Oporornis ag^ilis.— €onnecticnt Warbler. 



Sylvia agilis. Wils. AO. v. 1812, 64, pi. 39, t.4.—Steph. Gen. Zool. x. 1817, 732.— F. Ency. 

 M6th. ii. 1823, 448, n. 101.— J5p. Journ. Phila. Acad. iv. 1824, 199.— J5p. Ann. Lye. N. Y. 

 ii. 1826, 8i.—Aud. OB. ii. 1834, 227, pi. 138. 



SUvIa agllls, Oabot, Pr. Bost. Soc. ii. 1845, 63. 



Trichas agllls, Nutt. Man. i. 2d ed. 1840, 463.— Hoy, Proc. Phila. Acad.vi. 1853, 312 ( Wis- 

 consin ).—i?ead, ibid. 399 (Ohio).— .ffenn. Tr. Illinois Agric. Soc. i. 1855, 583. 



SylTiCOla agilis, Jard. "ed. Wils. 1832".— Rich. Rep. Bo-t. Assoc. Adv. Sci. for 1836, 1837, 

 n^.—Aud. Syn. 1839, G3.—Aud. BA. ii. 1841, 71, pi. 99.— Pm^. Pr. Ess. Inst. i. X856, 226. 



Oporornis agilis, Bd. BNA. 1858, 246 ; ed. of i860, pi. 79, f. <ii.— Wheat. Ohio Agric. Rep. for 

 1860, 1861, 363.— Bam. Smiths. Rep. for 1860, 1861, 435.— Coties £ Prent. ibid, for 1861, 

 1862, 406.— AHen, Pr. Ess. Inst. iv. 1864, S2.—£d. Rev. AB. 1865, 218.— Latur. Ann. Lye. 

 N.T.viii. 1866, 283.— Coues, Pr. Ess. Inst. v. 1868, 269.— Coi«e«, Pr. Bost. Soc. xii. 1868, 

 110 (South Carolina).— Trippe, Am. Xat. ii. 1868, 114.— Allen, Am. Nat. iii. 1869, 574.— 

 Turnb. B. E. Pa. 1869, 23 ; Phila. ed. l6.—Coites, Key, 1872, \06.—Breio. Pr. Bost. Soe. 

 XV. 1872, 3.— Pwrdie, Am. Nat. vii. 1873, 693.— B. B. <£ R. NAB. i. 1874, 290, fig. pi. 15, 



