308 GEOTHLYPIS — OPOROENIS AGILIS 



Genus GEOTHLYPIS Cabanis 



Trichas, Sw. Zool. Jonrn. iii. April-Jaly, 1827, 167 (not of Gloger, March, 1827, = Crmigtr 



Temin.,/ide Cabanis). Type 2^r(i«« (WcAos L. 

 Oeotblfpls, Oah. "Arch. f. Natnrg. 1847, Bd. i. 316, 349". Same type.— .Bd. BNA. 1858, 



240.— Bd. Kev. AB. 1865, 219 (review of genns; nine species).— iJHjio. Am. Jonm. 



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



147 (eight species and three yarieties). 



Chaes. — 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 yellon- 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. Our 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 agtlls.— Connecticut Warbler. 



Sylvia agllls, WiU. AO. v. 1813, 64, pi. 39, f. i.-Steph. (Jen. Zool. x. 1817, 732.— V. Bncy. 



M6th. ii 1823, 448, n. 101.— Bp. Jonrn. Phila. Acad. iv. 1824, 199.— Bp. Ann. Lyo. N. Y. 



ii. 1826, 84.— AMd. OB. ii. 1834, 227, pi. 138. 

 SllTia agllls, Oahot, Fr. Bost. Soc. ii. 1845, 63. 

 Tricbas agllls, Nutt. Man. 1. 2d ed. 1840, iSi.—Boy, Proo. Phila. Acad. vi. 1853, 312 (Wis- 



consin).- JJ«ii(J, ibid. 399 (Ohio).— £e»n. Tr. Illinois Agric. Soc. i. 1855, 583. 

 SylTlCOla aglllg, Jard. "ed. Wils. 1832 ".— 2JicR. Kep. Bost Assoc. Adv. Soi. for 1836, 1837, 



Vli.—Avd. Syn. 1839, 63.— Aud. BA. ii. 1841, 71, pi. 99.— Putn. Pr. Ess. Inst. 1. 1856, 226. 

 OporornlS agllls, Bd. BNA. 1858, 246 ; ed. of I860, pL 79, f. %— Wheat. Ohio Agrlo. Eep. for 



1860, 1861, 363.— £am. Smiths. Eep. for 1860, 1861, 435.— Oot«s it Prent. ibid, for 1861, 



1862, 406.— Aifen, Pr. Ess. Inst. Iv. 1864, Si.—Bd. Eev. AB. 1865, 218.— iowr. Ann. Lye. 



N.T.viii. 1866,283.— OoMM, Pr. Ess. Inst. v. 1868, 269.— Cows, Pr. Bost Soc. xii. 1868, 



110 (SonthCarolina).— SRrijjpe, Am.Natii. 186S, 174.— Alien, Am. Kat Iii. 1869, 574.— 



Turnb. B. E. Pa. 1869, 23 ; Phila. ed. 16.— Ooues, Key, 1872, 106.— Brew. Pr. Bost Soc. 



XT. 1872, 3.— Pitrdte, Am. Nat vii. 1873, 693.— JB. B. A B. NAB. I. 1874, 290, fig. pi. 15, 



