6UU BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



at base, 11.18-12.19 (11.43): tarsus, 18.80-20.32 (19.56); middle toe, 

 14.48-14.73.' 



Adnlt female.— IjQwgih (skins), 139.70-152.40(146.06); wing, 75.69- 

 78.23 (76.96): tail, 61.47-62.99 (62.23): culmen (from hase), 17.78; 

 depth of bill at base, 13.97; width of mandible at base. 11.18-12.19 

 (11.68): tarsus, 19.81-20.83 (20.32); middle toe, 14.73."- 



British Guiana to lower Amazon Valley (Santarem): Isthmus of 

 Panama ? ^ 



Coccoborux cyanoides Lafresxaye, Rev. Zmil., 1847, 74, pai't (adult male de.'icriljed, 



but not the female*). 

 [Cyanoloxia^ cyaHofV/c.-) Boxaparte, Consp. Av., i, 1850, 502 ("Panama"). 

 {'?) Guiraca cyanoides Sclater, Cat. Am. Birds, 1862, 101, part (Cayenne). — 



(?) Sclater and Salvin, Proc. Zool. Soc. Lond., 1866, 566 (Ucayali, e. Peru); 



1867, 750 (Chyavetas, e. Peru).— (?) Finsch, Proc. Zool. Soc. Lond., 1870, 



582 (Trinidad)— (?) Pelzelx, Orn. Bras., 1871, 222 (Cuyubi, Engenho do 



Grama, Salto Girao, Borba, and Maribatanas, Brazil) . 



' Four specimens. 



^ Two specimens. 



^ There la an adult female Cyanocompsa from Panama in the collection of the Ameri- 

 can Museum of Natural History (No. 41185, J. McLeannan, collector) which agrees 

 very closely with the Cayenne and Santai'em females in coloration except that the 

 upper surface is slightly more rufescent, or about intermediate in color between that 

 of the same parts in the female of C. cyanoides and Panama examples of C. concrda 

 cyanescens. The measurements agree sufficiently with those of miquestionable 

 females of C. cyanoides except those of the liill, which agree best with C. concreta 

 cyanescens. To which form the specimen in question should l)e referred I am unable 

 to determine without a much larger series. 



*Lafresnaye evidently had two very distinct birds in hand when he described his 

 CoccohoTus cyanoides. The supposed female or young bird, described in Latin, and 

 said to have come from Panama, woukl seem from the description to be clearly the 

 Panama form which has generally been known by the specific name cyanoides; Init 

 the adult male descrilied below is not that species, but another which resembles much 

 more in coloration the common C. cyauea, of wide range in eastern South America, 

 and differing chiefly in the more elongated and conical bill, as Lafresnaye explicitly 

 states, a free translation of his description being as follows: "The coloration of the 

 adult male is . . . entirely like that of the Coc. cyaneus, blue grosbeak [i. e. , C. cyanea^ ; 

 that is to say, it is everywhere of a deep dark blue, enlivened by a beautiful celes- 

 tial Ijlue upon the feathers of the forehead, of the eyebrows, of the corners of the 

 lower jaw, and upon the smaller wing-coverts. It differs from it, then, only by a 

 long conical beak, much more elongate, less swollen laterally at its Imse, but more 

 elevated near the forehead and much less arched above." 



Having been able, through the courtesy of the officers of the Boston Society of 

 Natural History, to examine Lafresnaye's types, I tind that the male specimen exactly 

 corresponds with Lafresnaye's description, as given above; but the supposed female 

 or young bird is neither of the same species nor the Panama form of C. concreta 

 formerly called cyanoides, but is a young example of Gidraca cserulea! Possibly it 

 may not be the specimen from which Lafresnaye took his description of the sup- 

 posed female or young, but there is a possibility that it may be; therefore, no other 

 course seems proper than to transfer the name cyanoides from the Panama form of 

 C concreta to the Amazonian species to which Lafresnaye's adult male of his Cocco- 

 borus cyanoides unquestionably belongs. 



