LOCHMIAS. 89 



Genus LOCHMIAS Swains. 



Lochmias Swainson, Zool. Journ. iii. p. 355, 1827. Type L, nematura 

 (Licht.). 



Fig. 41. — Lochmias nematura. 



The birds on which this genus is based are rather small in size 

 and contain only two species and one subspecific form. The bill, 

 which is almost straight, is slender and about two-thirds the 

 length of the tarsus. The wing is rounded. The tail is somewhat 

 stiffened and fan-shaped and nearly two-thirds the length of the 

 wing. The tarsus is slender and proportionately long, with 

 scarcely any trace of scutes. The distribution is confined to 

 South America. Coloration : male and female similar. 



405. Locliinias nematura castanonota. 



Chestnut-backed Shaep-tailed Creepeb. 



Lochmias nematura (nee Licht.) Salvin, Ibis, 1885, p. 418 (Kukenam 

 Mountains, 6000 ft.); Sclater, Cat. B. Brit: Mus. xv. p. 28, 1890 

 (" River Arranparu," Kukenam). 



Lochmias nematura castanonota Chubb, Bull. Brit. Orn. Club, xxxviii. 

 p. 87, July 1918. 



Adult female. Similar to L. nematura nematura (Licht.) from 

 South-east Brazil, but differs in being rich chestnut-brown on the 

 upper surface, the white on the under surface more restricted, 

 the white shaft-lines on the under tail-coverts much less extensive 

 and almost obsolete, and the smaller measurements. 



Total length 146 mm., exposed culmen from anterior part of 

 nostrils 14, wing 64, tail 43, tarsus 23. 



This subspecies is not represented in the McCounell collection 

 and the description is taken from the type in the British Museum, 

 which is the only known example. It was collected by the late 

 Henry Whitely on the Aruparu River in the Kukenam Mountains 

 at an altitude of 50Q0 ft. on the 29th of August, 1883. 



