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 Calamocichla jacksoni Nenm. 



Calamnrichla jackaoui Neiim., Oni. MMialsber. 1901. p. 18o [Ntebbi]. 



In 1001 I described a specimen from Ntebbi under this name as follows : 

 " Similar to C. leptorhi/ncha, but somewhat smaller, with the bill more slender. 

 Colonr of the npperside mnch lighter, pale yellowish brown, not earthy brown, 

 very light on lower back and rnmp. Underside greyish white, suffnsed with 

 yellow." 



I believed at that time that the species was somewhat smaller than lepto- 

 rkyncha, bnt having now had an occasion of examining a large series of Calamocichla, 

 collected by F. Jackson at ISJtebbi, in different years, I came to the conclusion 

 that the bird described as jacltsoni is a very yonng bird of a species which is 

 not smaller than leptorkyncha bnt larger, approaching in size C. parva, being 

 distinguished from this species by its more greyish brown and less fulvous brown 

 npperside and by its greyish underside. I arrived at that conclusion as no adult 

 specimen of the smaller size was ever got at Ntebbi, at which place all these 

 grey birds were collected. All the specimens, of which the measurements are 

 given below, were obtained at Ntebbi, the three marked with an * being in 

 the British Museum, the others in Mr. Jackson's private collection. 



Measurements. 



Calamocichla parva (Fschr. & Rchw.). 



Phjllostreijhus jyarvus Fschr. & Rcbw. J.f. 0. 1884. p. 202 [Lake Niawascha]. 

 Cidainonastes leptorhynchiis (uec Rchw.) Sharpe, Ibis 1892. p. 154 [Lake Naiwascha]. 

 Calamocichla lejitorhyncha (nee Rchw.) Neum. J.f. 0. 1900. p. .W2 [Umbugwe]. 

 Lusciniola rjmcilirostris (nee Hartl.) Grant & Reid, Ibis 1900. p. 646 [Lake Zuai]. 

 „ „ „ „ (partim) Alexander, Ibis 1900. p 81 [Zambesi]. 



Upi)erside fulvons brown. Underside tawny buff or brownish grey, but not 

 so grey as in jacksoni. Throat and middle of abdomen white. Lores of the same 

 colonr as the head, or slightly j)aler. It is extremely difficult to distinguish 

 between the females of pana and the males of leptorkyncha, both being about 

 eqnal in size. It seems to me that both species occur in East Africa side by side, 

 from Lake Znai in Southern Ethiopia to the Zambesi, though in German and 

 British East Africa C. parva occurs in the higher elevated regions, while 

 C. leptorkyncha is mostly found in the lowlands, and is the only one which occurs 

 in the coast regions of the Indian Ocean. The specimen from Lake Zuai has a 

 smaller and slenderer bill, and a slightly smaller hindclaw. 



