596 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



d. More rusty brown. 



Cyanocompsa concreta concreta, adult female and young (p. 596) 

 dd. Less rusty brown. 



Cyanocompsa concrete cyanescens, adult female and young (p.597) 

 CO. Bill smaller (culmen, from base, 17.78); color raw-umber brown, paler below. 

 Cyanocompsa cyanoides, adult female and young (p. 599) 

 aa. Bill much smaller (culmen, from base, not more than 13.21; depth of bill at base 

 less than 12.70); tail nearly even. [Cyanocompsa pareUina.) 

 h. Plumage blue. (Adult males. ) 

 c. Dark cyanine blue, the forehead bright cerulean or azure blue, lesser wing- 

 coverts and rump purplish azure blue. 

 d. Smaller (wing, 66.04-71.12; culmen, from base, 11.94-12.70). (Eastern 

 Mexico to Yucatan. ) . .Cyanocompsa parellina pareUina, adult male (p. 601) 

 dd. Larger (wing, 75.69; culmen, from base, 13.21). (State of Oaxaca, south- 

 ern Mexico. ) Cyanocompsa parellina snmichrasti, adult male (p. 602) 



cc. Indigo blue, the forehead bright turquoise blue, lesser wing-coverts and rump 

 cerulean blue. (Southwestern Mexico.) 



Cyanocompsa parellina iudigotica, adult male (p. 602) 

 66. Plumage brown. (Adult females and young. ) 

 c. Deeper (nearly raw umber) brown above, wood brown or cinnamon-brown 

 beneath. 

 d. Smaller (wing, 64.26-67.31; culmen, from base, 11.43-12.45). 



Cyanocompsa parellina parellina, adult female and young (p. 601) 

 dd. Larger (wing, 74.93; culmen, from base, 13.46).' 



Cyanocompsa parellina snmichrasti, adult female and young (p. 602) 



cc. Paler and grayer brown (deep broccoli) above, paler, more vinaceous, below. 



Cyanocompsa parellina indigotica, adult female and young (p. 602) 



CYANOCOMPSA CONCRETA CONCRETA (Du Bus). 

 BLUE-BLACK GROSBEAK. 



Adult male. — Plain dull blue-black, with a superficial tinting of dull 

 indigo blue, most obvious on forehead, superciliary region, cheeks, 

 and lesser wing-coverts; wings and tail black, with indistinct dusky 

 blue edgings; bill black (basal portion of mandible sometimes slightly 

 paler); legs and feet blackish. 



Admit female and immature male. — Uniform vandyke brown or deep 

 burnt umber brown above, rather lighter and clearer brown beneath; 

 wings and tail dusky with brown edgings. 



AdAdt m«fe.— Length (skins), 152.40-170.18 (160.63); wing,-78.74- 

 85.85 (82.80); tail, 66.55-76.20 (71.12); culmen, from base, 20.83-21.59 

 (21.34); depth of bill at base, 16.76-18.80 (17.53); width of mandible 

 at base, 13.46-15.24 (14.22); tarsus, 20.83-22.86 (22.10); middle toe, 

 13.46-15.75 (14.22).^ 



Adult female.— Ijidx^^tV (skins), 144.78-160.02 (153.42); wing, 74.17- 

 79.50 (77.22); tail, 63.50-69.85 (66.80); culmen, from base, 20.32-23.37 



'The measurements given are those of an immature male, and are probably some- 

 what greater than those of the adult female, which I have not seen. 

 " Eight specimens. 



