CH.ETUKA. 359 



322. CH/ETURA DUBIA McGregor. 



PHILIPPINE SPINE-TAILED SWIFT. 



Chcetura dubia McGregor, Bur. Govt. Lab. Manila (1905), 34, 15, pi. 12: 

 McGregor and Worcester, Hand-List ( 1906) , 59. 



Mindoro (McGregor). 



Adult. — General color blackish brown; back and nunp noticeably 

 lighter, being light seal-brown, each feather with a subterminal, more or 

 less concealed area or band of bluish violet; head and body shot with 

 bluish violet gloss, strongest on chin, throat, breast, and sides of head 

 and neck ; a large white patch on each side between nostril and lores ; 

 crissum white, each feather blackish brown at its base, the long tail- 

 coverts with edges also blackish brown except near tip; extending diago- 

 nally upward and forward on each flank, a wide white stripe connected 

 with the white crissum behind as in Chcetura gigantea; exposed edges of 

 wing-feathers black, inner webs of primaries largely light brown; inner 

 webs of alula, primary- and secondary-coverts shot with greenish blue 

 gloss; tertiaries greenish blue; lining of wing brown, each feather bor- 

 dered with dirty white which has its greatest extent on innermost feather ; 

 axillars dark brown, shot with bluish violet gloss, exposed portion of 

 tail blackish, the concealed basal portion glossed with green and blue. 

 Bill black ; iris brown ; legs and feet reddish flesh ; nails light brown. 



Male: Length, 339; wing, 320; tail, 64; bill from frontal feathers, 

 10; bill from anterior margin of nostril, 7; tarsus, 18. Female: Length, 

 334; wing, 318; tail, 64; bill from frontal feathers, 10; bill from 

 anterior margin of nostril, 7; tarsus, 18. 



This fine species is known from the type specimens, a pair taken on 

 the Baco River, Mindoro. It requires comparison with Chcetura cele- 

 bensis. The following notes probably refer to Chcetura dubia: 



"We think it probable that C. gigantea will eventually be found in 

 Mindoro. We repeatedly saw a very large swift in that island, but it 

 always kept well out of range. We thought it to be C. gigantea but 

 could not, of course, be at all sure. On our first trip we found G. gigantea 

 flying low over the numgrove swamps in Palawan and had no special 

 difficulty in securing specimens. On our second trip, however, we were 

 less fortunate, as the few individuals that we saw kept out of range." 

 (Bourns and Worcester MS.) 



.32:?. CH/GTURA PI CI N A Twoeddale. 

 TWEEDDALE'S SPINE-TAILED SWIFT. 



Chaiura picina Tweeddale, Proc. Zool. Soc. (1878), 944', pi. 59; HartERT, 

 Cat. Birds Brit. Mils. (1892), 16, 487; Siiarpe, Hand-List (1900). 2, 

 92; McGregor and Worcester. Hand-List (190G), 59. 

 Leyte {Whitehead) ; Mindanao {Ercrett). 



