194 Mr. W. R. Ogilvie-Grant on Birds 



o£ the breast and belly uniform white and by its small size. 

 Wing 92 mm., tail 37. 



The birds of this group have been dealt with by Mr. Ober- 

 holser [Pr. Acad. Philad. Iviii. pp. 204-212 (1906)] and by 

 Mr. Stresemann [Nov. Zool. xix. pp. 347-349 (1912)] . These 

 authors have recognised a number of subspecies, and some 

 at least appear to be quite insufficiently characterised, the 

 sole distinguishing feature being a very slight difference in 

 the size, which varies somewhat individually. 



CoUocalia esculenta maxima. 



Collocalia esculenta maxima Ogilvie-Grrant, Bull. B.O.C. 

 XXXV. p. 35 (1914). 



a. ? . Camp 11, Utakwa River, 8000 ft., 8th Feb. 1913. 



[C. B. K.I {Ti/pe of the subspecies.) 



This large mountain-form of C. esculenta (Linn.) differs 

 from the typical form in its much larger size, the' wing 

 measuring 115 mm. and the tail 51, as compared with wing- 

 about 100 mm. and tail about 40 in C. esculenta. A precisely 

 similar instance of a smaller coastal form and larger moun- 

 tain form is to be found in C. hirundinacea and C. h. excelsa. 



Chsetura novaeguineae. 



CJicetura novce -guinece D'Alb. & Salvad. ; Hartert, Cat. xvi. 

 p. 487 (1892) ; Roths. & Hartert, N. Z. xx. p. 491 (1913). 



a. c?. Upper Mimika River, Feb. 1910. [W. G.] 

 b-Ji. ^ ? . Parimau, Mimika River, 13th Nov.-12th Dec. 

 1910. [Nos. 1509, G. C. S. ; 479, 573-76, 718, C. H. B. G.] 



Iris dark brown; bill black; legs brown or purplish- 

 brown. 



This fine Spine-tailed Swift is new to the British Museum. 

 All the specimens in the series listed above appear to be 

 adult, but the shaft-stripes of the greyish-white feathers of 

 the breast and flanks vary much in individuals ; some, such 

 as Nos. 576 and 1509, have the streaks dark and strongly 

 marked, while in others, Nos. 573-575, they are less 



