FAMILY TYRANNIDAE 501 



Venezuela. While undoubtedly the two are closely related, the typical 

 coronatus population differs from that of mexicamis in being de- 

 cidedly darker. In addition, it is heavily cross-barred on the lower 

 surface, including the under tail coverts, has the tail shorter, and the 

 bill shorter and narrower. 



Measurements of O. c. coronatus are as follows : Males (25 from 

 southeastern Colombia, eastern Venezuela, Guyana and northeastern 

 Brazil), wing 72.0-80.9 {77.?>), tail 55.0-63.6 (59.5). culmen from 

 base 21.0-25.0 (22.7), tarsus 14.4-15.9 (15.3) mm. 



Females (7 from Amapa and Para), wing 69.0-74.2 (71.5), tail 

 55.0-60.0 (57.9), culmen from base 21.3-24.0 (22.2), tarsus 14.0- 

 15.8 (14.6) mm. 



From available data the considerable series of the two groups ap- 

 pear so clearly distinct that mexicanus, with its southern race 

 fratercuhis, is treated here as a separate species. 



PLATYRINCHUS CORONATUS SUPERCILIARIS Lawrence: 

 Golden-crowned Spade-bill, Piquichato Coronadorado 



Figure 44 



Plafyrhynchus siiperciliaris Lawrence, Ibis, vol. 5, no. 18, April 1863, p. 184. 

 (Lion Hill, Panama Railroad, Canal Zone, Panama.) 



Small ; short tail, broad, flat bill ; pale, with throat yellow. 



Description. — Length 80-90 mm. With stiff bristles at the side of 

 the bill. Adult male, center of crown yellow, bordered broadly by 

 russet-brown, with a narrow line of black at either side ; forehead dull 

 olive, with shaft lines of dull yellowish white ; lores dull yellowish 

 white ; hindneck, back, scapulars, rump, upper tail coverts, and lesser 

 wing coverts plain olive ; wings, including middle and greater coverts, 

 dusky, the feathers edged narrowly with light brown ; a narrow 

 superciliary and circlet around eye pale yellow ; cheeks olive-yellow, 

 bordered above and below by patches of black ; lower surface light 

 yellow, with the sides, upper breast, flanks, and tibiae washed with 

 olive ; axillars and under wing coverts grayish white ; inner webs of 

 wing feathers edged narrowly with dull brown. 



Adult female, similar, but with crown cinnamon-rufous or orange- 

 rufous. The crown patch of the male is indicated in some by a 

 central tinge of yellow. 



Juvenile, with the crown olive, somewhat darker than the greenish 

 olive of the back, without central markings ; side of head and line 

 over eye buff, with the dark patches as in adult ; under surface light 

 yellow to gray. 



