456 B0LLETIH' 50, UNITED STATES NATIONAL MUSEUM. 



region, margined, more or less distinctly, both above and below, by a 

 narrow, sometimes interrupted, streak of turquoise bine or light 

 greenish blue; rest of upper parts plain grayish bice green or dull oil 

 green, passiag into more decided green (bice or chromium green) on 

 wing-coverts, secondaries, and tail, the middle rectrices becoming 

 more bluish green or greenish blue distally and broadly tipped with 

 dull black; alula and primary coverts dull bluish green, the outer 

 webs of primaries (except innermost) clearer bluish green or greenish 

 blue; shafts of remiges and rectrices black; under parts plain light 

 grayish green (nearly chromium) paler and brighter on chin and 

 throat, sometimes slightly tinged with olive-green on chest; lower 

 foreneck with a median tuft of elongated black feathers, edged basally 

 with light bluish green; under wing-coverts light buff, tinged with 

 green, passing into duU green on edge of wing; inner webs of remiges 

 passing into dull grayish buffy on edge, except distaUy; bill, legs, 

 and feet black. 



Adult maZe.— Length (skins), 398-420 (406); wing, 137.5-146 

 (142.5); tail, 219-232 (226.5) ; exposed culmen, 44-47 (45.8); tarsus, 

 29-30.5 (29.8); middle toe, 19-20.5 (19.7)." 



^(iuZi /emaZe.— Length (skins), 382-421 (397); wing, 136.5-144.5 

 (141.1); tail, 203-230 (220.3); exposed culmen, 39-45.5 (42.7); tar- 

 sus, 27.5-29.5 (28.4); middle toe, 18-20.5 (19.3).* 



Northeastern Mexico, in States of Nuevo Le6n (Boquillo; Linares; 

 Rio de Ramos; Villa Grande; Hacienda de la Cruz; Rio Camarcho), 

 Tamaulipas (Tampico; AltaMira; Victoria; Sierra Madre near Vic- 

 toria; Forl6n; Xicotencal; Caballeros; Rio Martinez; Rio de la 

 Cruz), Vera Cruz (Rivera; Jalapa; C6rdova; Misantla; Colipa; Cui- 

 chapa; Plan del Rio; Rio San Juan Martin; Cuesta de Misantla; 

 Santa Ana; Hacienda Tortugas), Puebla (Rinconada), and San Luis 

 PotosI (Vall6s) ; Mexico (near City of Mexico) ? 



Prionites cxeruliceps Gottld, Proc. Zool. Soc. Lond., 1836, 18 (Tamaulipas, Mexico; 



coll. Zool. Soc. Lond.). 

 P[rionites] caeruliceps Oabanis and Heine, Mus. Eein., ii, 1859, 113 (Jalapa,^ Vera 



Cruz). 

 [Prionites] caeruliceps Heine and Reichbnow, Nom. Mus. Hein. Orn., 1890, 156 



(Jalapa). 

 Momotus cseruliceps Lesson, Actes Soc. lann. Bordeaux, xii, 1842, 190; Deac. 



Mam. et Ois., 1847, 266.— Geat, List Pissirostr. Birds Brit. Mus., 1848, 39.— 



Baird, Rep. Paciftc E. R. Surv., 1858, 161 (Boquillo, Nuevo Leon); ed. 



1860 ("Birds of North America"), 161, pL 46; Rep. U. S. and Mex. Bound. 



Surv., ii, pt. 2, 1859, 7 (BoquUlo); Cat. N. Am. Birds, 1859, no. 119.— 



Fereahi-Perbz, Proc. U. S. Nat. Mus., ix, 1886, 160 (Jalapa). 

 M[oimotas\ cseruliceps Gray, Gen. Birds, ii, 1847, 68. 

 [Momotus] cseruliceps Gray, Hand-list, i, 1869, 80j no. 936. 



a Five specimens. b Six specimens. 



