BIRDS OF NORTH AND MIDDLE AMERICA. 378 



[Eiiscarthmus] squamicristatus Sclater and Salvin, Nom. Av. Neotr., 1873, 145, 



))art (Costa Rica). 

 Lophotriccns squamicrislatttn Sclatek, Ca(,. Birds Bril. Mas., xiv, 1888, 87, part 



( Dota, Turrialba, and Tucurriquc, Costa Rica; Chitra, Calovevora, and Chiri- 



qui, Panama). — Salvin and Godman, Biol.Centr.-Am., Aves, ii, 1888, 16, part. 

 Lophotriccns scjuanncristaius minor Cherrie, Proc. U. S. Nat. Miis., xiv, no. 855, 



Sept. 4, 1891, 337 (Grecia, Costa Rica; coll. U. S. Nat. Mns.). 

 [Lo phot rice us] minor Sharpe, Hand-list, iii, 1901, 107. 

 Lophotricrus minor Banos, Proc. New Ens^;. Zool. Cliih, iii, 1902, ?>^) (Boqnete, 



Panama, 4,500-4,800 ft.). 

 Lophotriccus zeledoni Cherrie, Proc. U. S. Nat. Mus., xiv, no. 855, Sept. 1, 1891, 



337 (Dota, Co,sta Rica; coll. IT. S. Nat. Mus.; = adult female). 

 {Lo/ihntrirciis] '.ch'doni Sharte, Hand-list, iii, 1901, 10S. 



Genus ATALOTRICCUS Ridgway. 



Atalotriccusa Ridgway, Proc. Biol. Soc. Wash., xviii, Sept. 2, 1905, 208. (Type, 

 Colopterits pilaris Cabanis. ) 



Very small Tyrannidoe (wing about 40-43 mm.) similar to Colop- 

 teryx^ in reduction of outermost primaries, but diflferino; in ab.sence 

 of crest, in having four instead of three primaries reduced in size, 

 the reduction excessive and the shape of these reduced primaries very 

 different, being narrow and acuminate instead of normal. 



Bill more than half as long as head, depressed, rather narrow, sub- 

 spatulate, its width at nostrils equal to about half the distance from 

 nostril to tip of maxilla and decidedly but not conspicuously greater 

 than its depth at same point; exposed culmen more than half as long 

 as tarsus, about one-fourth as long as wing, sharply ridged, nearly 

 straight or very faintly convex to near tip, where slightly decurved, 

 the tip of maxilla very minutely uncinate; gonys longer than man- 

 dibular rami, very faintl}^ convex; maxillary tomium nearly straight, 

 minutely notched subterminally; lateral outlines of bill straight 

 and nearly parallel for more than basal half, then decidedly con- 

 vex and rapidly convergent to the tip of maxilla. Nostril exposed, 

 rather large, longitudinally oval or broadly elliptical, overhimg b}^ 

 broad membrane. Rictal bristles well developed, reaching more 

 than halfway to tip of bill; feathers of chin and frontal antine with 

 conspicuous bristly tips, those of the latter extending across and 

 much beyond nostrils. Wing short and excessively rounded, with 

 four outermost primaries excessively reduced in size, decreasing in 

 size from the tenth (outermost) to the seventh, very narrow, with 

 subacuminate and slightly curved tip; the longest of these (outer- 

 most) in adidt male only half as long as longest primary; third and 

 foui'th ]irimaries longest, second slightly shorter, first and fifth equal, 

 the sixth much shorter than secondaries. Tail nearly as long as 

 wing, distinctly roimded, the rectrices rather narrow. Tarsus long 



"'^raAo?, lender, delicate; rpiKKo^, a small l)ird. 

 '>See footnote on p. 342. 



