BIRDS OF NORTH AND MIDDLE AMERICA 93 



LiEBERMANN, El Homero, vi, 1935, 89 (Argentina, migr.). — Wetmore, 

 Smiths. Misc. Coll., cvi, No. 1, 1946, 25 (Pearl Islands, Panama). 

 Elanoides forficatus forficalus Bertoni, El Hornero, iii, 1924, 279 (Puerto Bertoni, 

 Paraguay) . 



Genus LEPTODON Sundevall 



Cymindis (not of Latreille, 1806) Dtjmont, Diet. Sci. Nat., i, 1816, Suppl., 89. 



(Type, by monotypy, Falco cayennensis Gmelin.) 

 Cymindis Cuvier, Rfegne Anim., i, 1817 (publ. 1816) 319, in text. 

 Cymindes (emendation) Fleming, Philos.-Zool., ii, 1822, 234. 

 Cymindus (emendation) Haldeman, Proc. Acad. Nat. Sci. Philadelphia, i, 1842, 



191. 

 Cymendis (emendation) d'Orbignt, in La Sagra, Hist. Nat. Cuba, Ois., 1839, 30. 

 Leptodon Sundevall, Vet.-Akad. Hand!., 1835 (1836), 114. (Type, by mo- 

 notypy, Falco cayennensis GmeUn (p. 267 but not p. 26d)=^Falco palliatus 



"Max." Temminck.) 

 Odontriorchis Kaup, Classif. Saugeth. und Vogel, 1844, 124. (Type, by monotypy, 



Falco cayennensis Gmelin (p. '_267 [but jnot [p. •263) = FaZco 'palliatus "Max." 



Temminck.) 

 Odontotriorchis (emendation) Agassiz, Index ZooL, 1846, 256. 

 Odonthriorchis (emendation) Bonaparte, Rev. et Mag. de ZooL, s6r. 2, vi, 1854, 



534. 

 Micraetus Bertoni, Aves Nuevas Paraguay, 1901, 156. (Type, by original 



designation, M. holmbergianus 'BeTtom= Falco palliatus Maximilian.) 



Medium-sized Perninae (wing about 283-346 mm.) with tumid cere, 

 oblique, slitlike nostril, distinctly rounded tail, feathered lores, and 

 with the bill relatively rather small, only moderately hooked, not 

 compressed, the tomia distinctly "toothed" and notched. 



Bill moderate in size, swollen laterally, moderately (not conspicu- 

 ously) hooked; culmen (chord) much shorter than tarsus (about as 

 long as outer toe), strongly and regularly decurved from base, the 

 tip of maxilla produced into a moderate-sized or rather small unguis; 

 gonys moderately convex; maxillary tomium with a distinct post- 

 unguinal angular projection or "tooth," posterior to which the tomium 

 is more or less irregular, rather deeply incised a little posterior to the 

 middle; mandibular tomium with two distinct angular subterminal 

 angular projections, the tip of mandible obliquely truncate; cere tumid, 

 rather narrow, its upper outline ascending proximally, the anterior 

 outline faintly convex in front of nostril, concave for lower portion; 

 nostril narrow (almost slitlike), oblique, overhung by tumid membrane, 

 its anterior (upper) end touching edge of cere. Wing long, broad, 

 and rounded, the longest primaries exceeding proximal secondaries 

 by not more than one-sixth of the length of ^\^ng; third to fifth pri- 

 maries (from outside) longest, the first shorter than seventh, sometimes 

 shorter than ninth; secondaries much developed, broad, the longest 

 proximal ones reaching beyond the tip of the outermost primary. 

 Tail rather long (about two-thirds as long as wnng), distinctly rounded, 

 the rectrices broad. Tarsus robust, about one-eighth as long as wing, 



