i8gS 1 RiDtiWAV, A^cw Genera (Old Species of American Birch. 2 20 



also unquestionably belong. A new name being therefore 

 required for the Central American bird, I take pleasure in 

 naming it after Dr. C. W. Richmond, Assistant Curator of the 

 Division of Birds, U. S. National Museum, who procured a series 

 of beautifully prepared specimens in Nicaragua. 



Cyanocompsa concreta cyanescens. Panama Blue 



Grosbeak. 



Similar to C. concreta (DuBus) but averaging smaller (the bill espec- 

 ially), the male more decidedly bluish, the adult female and young less 

 rusty brown. Length (skins) 5.60-6.50 (6.00); wing, 2.90-3.28 (3. 11); 

 tail, 2.37-2.75 (2.62); culmen, from base, 0.7S-0.S9 (0.81); depth of bill at 

 base, 0.60-0.70 (0.66); width of mandible at base, 0.49-0.54 (0.51) ; tarsus, 

 0.76-0.87 (0.83) ; middle toe, 0.55-0.62 (0.59). 



Colombia (including Isthmus of Panama) to Venezuela and western 

 Ecuador. (Specimens from Veragua, Costa Rica, Nicaragua, and southern 

 Honduras connect the typical Colombian bird with G. concreta of southern 

 Mexico, Guatemala, and northern Honduras, the concreta type reaching its 

 extreme development in southern Mexico. ) 



Type, No. 146x14, U. S. Nat. Mus., (J ad., Panama, 1877; A. Boucard. 



This is the Guiraca cyanoides of authors, but is not the Cocco- 

 borus cyanoides of Lafresnaye, as has erroneously been supposed. 

 I have examined the types of the latter, now in the collection of 

 the Boston Society of Natural History. The female type is a 

 young example of Guiraca cczriilea ; but the male type represents 

 a very distinct species, of which I have seen specimens from 

 Venezuela, Guiana, and the lower Amazon Valley (Santarem) . 

 Cyanocompsa cyanoides (Lafresnaye) is a much more brightly 

 colored bird than C. concreta cyanescens, the coloration of the male 

 being far more like that of the smaller South American species, 

 Cyanoco77ipsa cyanea (Linnjeus). The female, however, is very 

 differently colored, being of a deep bistre-brownish or sepia hue, 

 very different from the tawny color of C. cyanea. 



Amphispiza bilineata deserticola. Desert Sparrow. 



Similar to A. bilineata (Cassin) but averaging decidedly larger, with 

 upper parts lighter and browner, and the white spot at tip of inner web 

 of lateral tail-feather much smaller. Length (skins), 4.S0-5.45 (5.05); 

 wing, 2. 45-2. 78 (2. 58); tail, 2.32-2.69 (2.45); exposed culmen, 0.36-0.42 



