118 BULLETIN 86, UNITED STATES NATIONAL MUSEUM. 



CHORDEILES RUPESTRIS ZALEUCUS, new subspecies. 



Chordeiles rupestris Sclater, Proc. Zool. Soc. Lond., 1S66, p. 135 (part, 

 lower Ucayali River, eastern Peru). — Sclateb and Salvin, Proc. Zool. 

 Soc. Lond., 1866, p. 193 (lower Ucayali River, eastern Peru) ; 1873, 

 p. 290 (lower Ucayali River and entire Huallaga River [breeding], 

 eastern Peru). — Taczanowski, Ornith. Perou, vol. 1, 1884. p. 214 

 (upper Ucayali River, Huallaga River, and Pebas, Peru) . — Habtekt, Cat. 

 Birds Brit. Mus., vol. 16, 1892, p. 617 (part, Ucayali River, Yquitos, 

 and Pebas, Peru). — Gates and Reid, Cat. Coll. Birds' Eggs Brit. Mus., 

 VOL 3, 1903, p. 58 (Ucayali River, Peru). — Iheeing and Iheeing, Cat. 

 Fauna Bras., vol. 1, Aves, 1907, p. 132 (part, eastern Peru). — Hellmayr, 

 Novit. Zool., December, 1910, p. 378 (part) (Peru). 



[Chordeiles] rupestris Gray, Hand-List Gen. and Spec. Birds, vol. 1, 1869, 

 p. 61 (part, lower Ucayali River, Peru). — Sharps, Hand-List Gen. and 

 Spec. Birds, vol. 2, 1900, p. 80 (part, Bolivia, Peru). 



Chars, suhsp. — Resembling Chordeiles rupestris rupestris^ but 

 female more grayish above, particularly on wing-coverts; with a 

 large white patch 47 mm. long on middle portion of inner web of 

 fourth primary (counting from the outermost), this patch reaching 

 to the shaft, which is white itself at this point; inner web of outer- 

 most rectrix with two broad dark brown bands (instead of spots) 

 besides the terminal and the basal bands ; spots on breast larger and 

 more numerous. 



Description.— Ty^iQ, adult [female] ,i No. 55318, U.S.N.M., Pebas, 

 Peru ; Prof. Jarnes Orton ; original number, 275, Upper surface light 

 drab (the scapulars exteriorly largely buff or ochraceous buff), finely 

 and confusedly spotted, streaked, barred, and vermiculated with dull 

 white, darker drab, broccoli brovv^n, grayish sepia, and grayish clove 

 brown, the darkest brown markings mostly confined to pileum, scapu- 

 lars, and upper tail-coverts, the pileum and middle of back more 

 streaked, the posterior upper parts more barred; tail largely cream 

 white, but basal portion of the feathers, and two (on some of the feath- 

 ers only one) broad but somewhat broken and incomplete bars, of a 

 dark brown, between clove brown and hair brown ; ends of rectrices, 

 except middle pair, with a wide band of the same dark brown, though 

 much mottled above and below with lighter brown ; outer webs of outer- 

 most and all of the next to the middle pairs of rectrices partly light, 

 partly darker, broccoli brown, mottled and more or less irregularly 

 barred with the dark brown of their tips; middle pair of feathers 

 basally broccoli brown, distally rather grayish hair brown, finely 

 mottled and vermiculated, particularly on terminal half, with the 

 dark brown of the rest of the tail, and crossed by six rather narrow, 

 and distally much broken bars of the same dark brown; primaries 

 of the same dark brown as the tips of the tail-feathers, but some- 

 what more grayish, the three outer quills unmarked, the fourth with 



1 Marked " male " on the original label. 



