44 NEW SPECIES OF SWIFTS RTDGWAY. 



b-. UpiMM- tiiil-covorts <l;irk ;;r;iy, willi outer wclis "lossy hliickisli ; rmii]) darker 

 <>riiy; sniiiUtu- (winj^ 3.85-4,20). Ildh.. (iroiijid.i. West, Indies; also, 'J\)l)ago, 



Trinidad, or N'oiiozuela ( '. cinereivcntris lawrcncci. 



a'K IJelly and llaiiks blackish gray, not conspicuously different from color of under 

 tail-coverts. Upper tail-coverts with l)oth webs gray, like rump. Hah., 

 Guiana to Nicaragua C. einereirevfris gitianensis. 



Cypseloides cherriei, s]i. nov. 



Sp, Char.: Adult (Ko. 1L>7()()!), l-. S. National Museum, Yolcan <le 

 Irazu, ( 'Ostu ilica; (xeor.uc Iv. Clierno). Similar in size and ,oeiieral 

 form to ('. hninnciforqucs (Lafr.), but tail ({uitci truncated, with feath- 

 ers less riyid and only very minutely mucronate. Color, uniform sooty 

 black (much darker than in C. ]>rini)icitorqncs)^ the under surface some. 

 Avhat ])aler, especially anteriorly, where becoming light grayish on the 

 chin. A large, sharply defined, spot of silky white on each side of the 

 forehead, immediately over the lores, and a short streak of the same 

 color immediately behind the eye; loren velvety black, in very sharj) 

 contrast with the white spot above them. Length (skin), 5 inches; 

 wing, (>; tail, 1.87; tarsus, 0.50, 



Tliis apparently new species needs no comparison with any other, 

 the peculiar white markings of the hca<l being sulficient to at once dis 

 tinguish it. 



The type si)ecim('n was generously presented by the authorities of 

 the ('osta Rica National Museum. 



