37<'> bt^tj,i;tik r,o, ttntted states national museum. 



[('olopUruti] piluris Bonatakte, Coiisp. Av., i, 1850, 184 (Colombia). — Sclater 



and Salvin, Noin. Av., Neotr., 1878, 4G. 

 ('\oloj)t(n(s] pilaris Cabanis and Heine, Mus. Hein, ii, 1851), 52 (Cartagena). 

 [Todirostrnm] pilaris Gray, Hand-list, i, 1869, 349, no. 5284. 

 C[olopteryx] pilaris Ridgway, Proc. U. S. Nat. Mus., x, Aug. 6, 1888, 520. in text. 

 [Colopteryx] pilaris Sharpe, Hand-list, iii, 1901, 108. 

 E,iisc,a.rthmiis] pilaris Gray, Gen. Birds, iii, 1849, App., p. 306. 

 Atalotriccus jnlaris Ridcway, Pror. Biol. Soc. Wash., xviii, Sept. 2, 1905, 208. 

 ToHirostrum exile Sclater, Proc. Zool. Soc. Lond., 1857, 83, pi. 125, fig. 3 (( olom- 



Ina; coll. P. T.. Sclater).— Cassin, Proc. Ac. Nat. Sci. Philad., 1860, 144 



(Colombia). 

 Todlrostruvi megaceplmliiiti (not TihIus vie</(iri'p}i<ihis Swainsonj JjAwiiENCE, Ann. 



Lye. N. Y., vii. 1862, 330 (Panama K. R.). 



Genus PER ISSOTRICCUS Oberholser. 



Pmsso/»'icc(is " Oberholser, Proc. U. S. Nat. Mus., xxv, no. 1276, Aug. 30, 1902, 

 64. (Type, Todiroslrinn ecaiidatnvi D'Orbigny and Lafresnaye. I 



Extremely small Tyrannidge (wing about 30-35 mm.) with very 

 short tail (less than half as long as wing), rather narrow, long bill (its 

 wndth at nostrils less than half as long as exposed culmen, the latter 

 about as long as middle toe with clawO, coloration olive-green above, 

 passing into gray or black on pileum, under parts white, passing into 

 pale yellow posteriorly. 



Bill nearly as long as head, narrowly triangular in vertical profile, 

 its width at nostrils less than half the length of exposed culmen, much 

 greater than its depth at same point, the lateral outlines converging 

 rather suddenly from about one-third the distance from tip; exjiosed cul- 

 men about as long as middle toe with claw, distinctly ridged, straight 

 for basal half, at first very faintly then more strongly curved to the 

 minutely uncinate tip of maxilla; gonys longer than mandibular rami, 

 faintly convex; maxillary tomium straight, distinctly notched stib- 

 terminally. Nostril exjjosed, small, longitudinally broadly oval, in 

 anterior end of nasal fossae. Rictal bristles well developed (at least 

 half as long as bill), the feathers of chin and frontal antia^ with con- 

 spicuous long bristle-like tips. Wing short and rounded, the longest 

 primaries exceeding secondaries by about length of middle toe with- 

 out claw; sixth, seventh, and eighth primaries longest, ninth l)iil 

 little shorter, the tenth (outermost) intermediate between fourth and 

 iifth or equal to the latter. Tail nuich less than half as long as wing, 

 but decidedly longer than tarsus, slightly double-rounded or emargi- 

 iiate, the rectrices relatively narrow. Tarsus much more than one- 

 third as long as wing (nearlj^ as long as tail), its scutellation typicallv 

 exaspidean, with the two edges of the acrotarsium in close contact on 

 inner posterior side of tarsus, the acrosartial segments indistinct; 

 middle toe, without claw , about half as long as tarsus, its basal phalanx 



allspiedoi, wonderful; rpiKKos, a small bird. 



