VOL. XXlll, PP. 53-56 APRIL 19, 1910 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



~ 



DIAGNOSES OF XK\V FORMS OF MICROPODID-flC AND 

 TROOHILIIX/E. 



BY ROBERT RlIXiWAY. 

 [By permission of the Secretary of the Smithsonian Institution.] 



Streptoprocne zonaris mexicana subsp. nov. 



Type from Rio Seco, near Cordova, Vera Cruz, Mexico. No. 41,636, 

 I'. S. Nat. Mus. Adult male. January, 1866, Prof. F. Sumichrast. 



Similar to S. z. albicincta (Cabanis), of Costa Rica and northern South 

 America, but averaging larger, general coloration decidedly duller (less 

 bluish) black, and forehead always distinctly grayish sooty. Adult male 

 (type): AVing, 207.") mm.; tail, S3; exposed culmen, 10; tarsus, 22.5; 

 middle toe, 15. 



Chaetura richmondi sp. nov. 



Type from (iuayabo, eastern Costa Rica. No. 209,570, V. S. Nat. Mus. 

 Adult female. March 5, 1908. Museum -Zeledon Exped. 



Similar to C. gaumeri, of Yucatan, but larger and coloration darker, 

 the pileum and back more nearly black ; spiny tips to rectrices longer, 

 always well developed. Adult female (type): Wing, 115mm. ; tail,37.o; 

 exposed culmen, 4.5; tarsus, 10.5; middle toe, 8. 



Cypseloides niger jamaicensis subsp. nov. 



Type from Mayfield, St. Andrews, Jamaica. No. 78,205, I'. S. Nat. 

 Mus. Adult female. June 25, 1879, Edward Newton. 



Similar to C. n. niger, of Santo Domingo, but much darker (especially 

 the adult female), the upper and under parts sooty black, more or less 

 distinctly (but not conspicuously) paler or more grayish sooty on chin, 

 throat, and chest. Adult female (type): Wing, 149.5 mm.; tail, (54.5; 

 exposed culmen, 5.5; tarsus, 11.5; middle toe, 9.5. 



Cypseloides niger costaricensis subsp. nov. 



Type from San Jose, Costa Rica. No. 108,275, I'. S. Nat. Mus. Adult 

 male? May 10, 1885, Jose C. Zeledon. 



Similar to ( 1 . n. borealis, of western North America, but smaller and 

 decidedly darker, the adult female with feathers of abdomen ami Hanks 



11 PKOO. UIOL. Soc. WASH., Vol.. XXlll. 1910. (r,;j) 



