MICROPUS. 361 



Gemis MICROPUS Meyer and Wolfe, 1810.* 



Tarsus well feathered in front: outer toes more or less reversible: 

 claws strong ; tail decidedly forked : rectrices pointed but not stiff ; nostril 

 opening oval with a median septum which is not plainly seen in the dr}' 

 specimen. 



Species. 



a}. Larger; wing, more than 160 mm.; feathers of breast tipped with white. 



pacificus (p. 3e>l) 

 a". Smaller; wing, less than 150 mm.; feathers of breast uniform blackish. 



subfurcatus (p. 362) 



32.5. MICROPUS PACIFICUS (Latham). 

 WHITE-RUMPED SWIFT. 



Hirundo pacifica Latham, Index Orn. Suppl. (1801), .5S. 



Micropus pacificus Hartert, Cat. Birds Brit. Mus. (1892), 16, 448. 



Cypselus pacificus Shakpe, Hand-List (1900), 2, 96; McGregor, Phil. .Joiir. 



Sci. (1907), 2, sec. A, 339 and 340, pis. 4 & 5, fig. 1; Oate.s and Reid, 



Cat. Birds' Eggs (1903), 3, 81. 



Batan (McGregor, Mearns) ; Camiguin N. (McGregor). Eastern Siberia, 

 China, Japan, Formosa, Burmese provinces, Assam, Manipur; in winter to 

 Australia. 



Adult. — General color blackish brown; a broad rump-band white, its 

 feathers with browoi shafts; upper parts with a slight oil-green gloss; 

 loral feathers white with black tips; chin and throat white Avith narrow 

 dusky shaft-lines ; sides of head and neck light dingy brown ; under parts 

 and under wing-coverts brown, each feather with a wide white fringe 

 and a deep brown subterminal band ; under tail-coverts narrowly fringed 

 with white. Iris brown; bill and nails black; feet blackish brown. 

 Length, 184 to 190. A male measures: Wing, 182; tail, 77; depth of 

 fork, 29 ; bill from frontal feathers, 7. A female measures : Wing, 178 ; 

 tail, 77; depth of fork, 29; bill from frontal feathers, 8. -, 



This handsome swift was observed in large numbers on Batan Island 

 and all of our specimens were killed within the town of Santo Domingo 

 de Basco. Near the summit of Mount Araya (1,160 meters) numbers 

 of these birds were seen in their graceful and powerful flight. 



* Some authors prefer Apus Scopoli, 1777, for this genus; Dr. Sharpe uses 

 Cypselus Illiger, 1811. Cf. Hartert, Das Tierreich (1897), 1, 83; Sharpe, Hand- 

 List, (19001.2, (introduction); Allen. .1 »/,• (1901). 18, 121. 



