(324) 



Wing. T.iil. Bill. 



4. Mus. Vindob. No. 1S3S4. " S " ail. Villii Maria, Matto- 



grosso, August ^4, 1S2^). Natterer coll. Type of J/. 



f/)-ar/liro.s/r>s I'cV/,. . . . . . . . .So! Tl^l Ifi mm. 



5. Mus. Vindob. No. 1S392. " c? " ad. Borba, Kio Madeira, 



March 1, 1830. Natterer coll 80i 



C). Mns. H. V. Berlejiscli. Baliia-skiii . . . .714 



7. Mus. Tring. " ? " ad. Igarape Assu, I'an'i, January "Jo, 



1904. A. Robert coll. No. It) 39 . . . . 7Z 



Count Bcrlepsch * ba.s already suggested tliat 7\ tuhc.rculij\: 

 to be the same as M. tricolor, and the comjiarison of the types uf both species 

 convinced me of the correctness of his determination. 



I'elzelu distinguished a specimen from Mattogrosso s.u. M. gracilirostris on 

 account of its smaller, narrower bill, less dusky cap, and larger size. The type is 

 now before me, and I find a specimen from Borba in every respect identical. Both 

 e.Nami>les differ from the types of J/, tricolor ex Eio as well as from two skins from 

 Bahia and Para in their longer wings and tail, narrower bill and brighter yellow 

 belly. IhniiyiiC oi M. tuberctilifcr {ay: Guarayos, East Bolivia), however, has the 

 bill quite as broad and long, and the belly as pale as those from East Brazil, while 

 in the dimensions it agrees with M. ffracilirostria. 



The coloration of the cap is very variable. In the male type of ^f. tricolor it 

 is decidedly sooty blackish, in the female type dusky, in Nos. 1, 4, 5 and 6 scarcely 

 darker than the back. In a series of fourteen adults from Cumana the same 

 variation is to be observed. 



Specimens from British Guiana, Cumana, Trinidad, Orinoco, Bogota and Eastern 

 Ecuador agree in dimensions and colour perfectly with the tyjies of ^1/. (jracilirostris 

 and M. tuberculi/er, and belong certainly to the same form. There remains only 

 the (piestion whether the form inhabiting Eastern Brazil (from Kio to Para) is 

 always distingnishal)le by its slightly smaller size, in which case it ought to be 

 called M. tuberculifer tricolor Pelz. I notice, however, tbat one specimen from 

 Paramaribo, Surinam, is scarcely larger than the latter (wing 74 ; tail 074 ; bill 

 17 mm.). 



There can be no longer any doubt that M. tuberculifer and M. gracilirostri.s 

 are synonymous, and have nothing to do with M. atricejjs Cab., which is a much 

 larger bird, with a deep black cap. It may be added that the specimens m—y 

 of M. " nifjricejts " apud Sclater {C'nt. B. xiv. p. 258) are absolutely indistinguish- 

 able from the types of M. tuberculifer and M. gracilirostris, while .1/. iiigriceps of 

 West Ecuador and North Pern (Cajabamba, Cutervo, etc.) is readily known by its 

 deep black head. 



23. Xenopipo subalaris Godm. = Chloropipo unicolor Tacz. 



Chlorojiipn unicolor Taozanowski, Orn. riroit ii. (1884), p. 335. descr. orig. ? [Amable Maria, Peru 

 ccntr.] ; Berlepsch & Stolzmann, P. Z. .S. 189(5. p. aiiS (descr. ? ; crit.) [Garita del Sol, Peru 

 centr.]. 



Xenopipo siibaUiris Godman, Bull. Biit. Orn. CI. x. no. Ixvii. (December 189'.!), p. x.wii descr. orig. 

 cJ ? [Guajabamba, Peru sept.]. 



Wing. 



1. Mns. Brit. " t? " imm., Gnayabamba, N. Peru, 14. ix. 1894 76 

 •J. Mns. Brit. (?) imm., Gnayabamba, N. Peru, 20. viii. 1894 72 

 [Types of Xenopipo subalaris Godm.] 



* Journ.f. Ornith. 1884. p. 304, and Ibis, 18S3. p. 141. 



