Vol. XXIIl, pp. 53-56 April 19, 1910 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



DIAGNOSES OF NEW FORMS OF MICROPODIDJ^: AND 



TROCHILID^. 



BY robp:rt ridgway. 



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



Streptoprocne zonaris mexicana subsp. iiov. 



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

 U. S. Xat. Mus. Adnlt male. January, 1866, Prof. F. Sumichrast. 



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

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

 bluish) black, and forehead always distinctly grayish so(jty. A(hilt male 

 (type): Wing, 207.5 mm.; tail, 83; exposed culmen, 10; tarsus, 22.5; 

 middle toe, 15. 



Cheetura richmondi sp. nov. 



Type from Guayabo, eastern Costa Rica. No. 209,570, V. S. Nat. INIus. 

 Adult female. March 5, 1908. ^Nluseum-Zeledon P'xped. 



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, 115 mm. ; tail, 37.5; 

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



Cypseloides niger jamaicensis subsp. nov. 



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

 ]\Ius. Adult female. June 25, 1879, Edward Newton. 



Similar to C. n. niger, of Santo Domingo, l)ut much darker (especially 

 the adult female), the upi)er 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, ()4.5; 

 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, U. S. Nat. IMus. Adult 

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



Similar to C. n. borealis, of western North America, l>ut smaller and 

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



n— Pruc. Biol. Sue. Wash., Vol.. XXIJI, 1'.)1U. (aU) 



