BIRDS OF NORTH AND MIDDLE AMERICA. 637 



pair of rectrices 6.3 shorter, the lateral one only 3.8 wide m middle 

 portion.'^ 



Trochilus violajugulum Jeffries, Auk, v, no. 2, April, 1888, 168 (Santa Barbara, 

 California; coll. J. Amory Jeffries); vi, 1889, 223.— Chapman, Auk, v, 1888, 

 396. — American Ornithologists' Union, Suppl. Check List, 1888, 10, no. 

 429.1; Auk, v, 1888, 396; Abridged Check List, 1889, no. 429.1; Check List, 

 2d ed., 1895, no. 429.1.— Ridgway, Rep. U. S. Nat. Mus. for 1890 (1891), 329, 

 pi. 38, fig. 2 (monogr.); Man. N. Am. Birds, 2d ed., 1896, 598.— Boucard, 

 Gen. Hum. Birds, ii, 1892, 3.— Bendire, Life Hist. N. Am. Birds, ii, 1895, 

 201. 



T[rochilus\ violajugulum Hartert, Das Tierreich, Troch., 1900, 202. 



[Trochilus] violijugulum Sharpe, Hand-list, ii, 1900, 140. 



Genus TILMATURA Reichenbach. 



Tryphsenab (not of Ochsenheimer, 1816) Gould, Mon. Troch., pt. i, June, 1849; 



Introd. Troch., oct. ed., 1861, 96. (Type, Ornismya dupontii Lesson.) 

 Tilmatura Reichenbach, Aufz. der Colibr.,c 1854, 8; Troch. Enum., 1855, 5. 



(Type, T. lepida Reichenbach =Orm>?n?/a dupontii Lesson.) 



Small Trochilidse (length, including long tail of adult male, about 

 58-100 mm.), resembhng NesojMox, but with bill shorter than head, a 

 conspicuous white or buffy patch on each side of rump, the adult male 

 with lateral pair of rectrices abruptly contracted near tip, and tliree 

 outer rectrices tipped and banded with white. 



Bill (unfeathered portion) shorter than head, straight, slender, 

 terete; culmen rounded, scarcely contracted basally; tomia smooth; 

 mandible with the usual lateral median groove. Nasal operculum 

 broad and convex, nude, but covered by decumbent frontal feather- 

 ing, wMch extends anteriorly to about anterior end of nostril, forming 

 a very short obtuse point or antia on each side of culmen. Tarsus 

 naked on inner and posterior sides, feathered on anterior and outer 

 sides; outer toe apparently about as long as middle toe, the inner 

 slightly shorter; hallux about as long as inner toe or slightly shorter. 

 Wing about three times as long as exposed culmen, the outermost 

 primary longest. Tail of adult male nearly one and a half times as 

 long as wing, forked for about three-fourths its length, the outer pair 

 of rectrices abruptly contracted terminally, but with rounded, slightly 

 expanded tip; in adult female about half as long as wing, deeply 

 emarginate, but with outermost rectrix shorter than the next. 



Coloration. — Above rather dark metallic bronze-green, including 

 middle rectrices ; a conspicuous spot of white or buff on each side of 

 rump. Adult male with chin and throat black, the feathers tipped 

 with dark violet-blue, chest white, the longer rectrices tipped and at 



a The tip of the bill having been shot away, the length of the culmen can not be 

 given; the length of the bill from the base of the culmen to the tip of the mandible, 

 however, is 17.2 mm. 



b Tpucjjaiva, nom. prop. (Gould.) 



c A nomen nudum in "Aufz. der Colibr." 



