262 Netson, Wew North American Birds. ‘a8 
Cypselus brunneitorques griseifrons, subsp. nov. NORTHERN 
RUFOUS-COLLARED SWIFT. 
Type, No. 157055, @ ad., U. S. Nat. Mus., Biological Survey Collection. 
Santa Teresa, Territory of Tepic, Mexico, August 8, 1897, E. W. Nelson 
and E. A. Goldman. : 
Distribution.—Sierra Madre Mountains of Tepic, Jalisco, Western Zaca- 
tecas and Southern Durango, Mexico. 
Subspecific characters.—Male differs from typical C. brunnettorgues in 
more distinctly gray edges to feathers of forehead and over eyes; smaller 
dark throat patch; paler, more rusty rufous collar; with paler and more 
grayish shade of black over entire body. The female differs from typical 
birds in its grayer forehead; darker chin and throat; grayer and less 
brownish shade to black on entire body; and in having the rump paler 
than rest of back, forming a poorly marked rump patch. 
Dimensions of type-—Wing, 122; tail, 41 ; culmen, 5; tarsus, 12. 
Thalurania ridgwayi, sp. nov. Ripcway’s THALURANIA. 
Type, No. 155981, U. S. Nat. Mus., Biological Survey Collection. 
San Sebastian, Jalisco, Mexico, March 18, 1897, E. W. Nelson and E. A. 
Goldman. 
Distribution. — Known only from type locality. 
Specific characters.— Readily distinguished from other known mem- 
bers of the genus by the dark, non-metallic underparts. 
Description of tyfe.— Top of head from base of bill to middle of 
crown dark metallic blue; rest of crown dark, rather dull bluish green; 
sides of head, back of eyes, upper half of neck and entire back bronzy 
green, darkest on upper tail-coverts; wings dark purplish brown; tail 
lustrous black with slight purplish gloss; chin, sides of head to lower 
side of orbits, and entire under side of neck brilliant metallic green; 
under side of body dull blackish washed with metallic greenish on sides ; 
under coverts lustrous black. 
Dimensions. — Wing, 57; tail, 33 ; culmen, 17. 
General notes.— This species extends the range of the genus 
from Honduras to Central-Western Mexico and is the most unex- 
pected of the results obtained during our brief visit to the ‘island’ 
of humid tropical forest found near San Sebastian on the arid 
tropical west slope of Jalisco. ‘The number of new and interest- 
ing birds found during our visit of a few days duration at that 
locality is sufficient to justify much more thorough work there. 
