596 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



(/. More rusty ])ro\vn. 



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

 del. Less rusty Ijrown. 



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

 cc. Bill smaller (culmen, from base, 17.78); color raw-umljer 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 parelUna.) 

 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 parellina, adult male (p. 601) 

 dd. Larger (wing, 75.69; culmen, from base, 1.5.21 ). (State of Oaxaca, south- 

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



cc. Indigo blue, the forehead l)right turquoise blue, lesser wing-coverts and rump 

 cerulean blue. (Southwestern Mexico.) 



Cyanocompsa parellina indigotica, adult male (p. 602) 

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

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

 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 l)ase, 13.46).' 



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



GG. Paler and grayer Ijrown (deep brocc(j]i) above, paler, more vinaceous, l)el<jw. 



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



CYANOCOMPSA CONCRETA CONCRETA (Du Bus). 

 BLTJE-BLACK GROSBEAK. 



Adult male. — Plain dull blue-black, with a superlieial tintiiii;- of dull 

 indigo blue, most obvious on forehead, superciliary reg-ion, 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. 



Adult female and immatuTe male. — Uniform Vandyke })rown or deep 

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

 wings and tail dusky with brown edgings. 



Adult male.— \^<i^g\X\ (skins), 152.40-170.18 (160.53); wing, 78.74- 

 85.85 (82.80); tail, 60.55-76.20 (71.12); culmen, from base, 20.83-21.59 

 (21.34); depth of bill at ba.se, 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.— Li^VL^\kx (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 inuuature male, and are probably some- 

 what greater than those of the adult female, which I ha\'e not seen. 

 ^ Eight specimens. 



