Todd — New Forms of Finches and Tanagers. 93 



of Chiquitos) is interesting indeed. It is probably a local form with a 

 restricted range, which with only one specimen available might have been 

 set down as an extreme individual variant, but with four adult males at 

 hand, all showing the same characters, it is evident that a geographical 

 race is involved. 



Type, No. 80,182, Collection Carnegie Museum, adult male; Palmarito, 

 Rio San Julian, Chiquitos, Bolivia, May 24, 1918; Jos6 Steinbach. 



Mitrospingus cassinii costaricensis, subsp. nov. 



Similar to Mitrospingus casinii cassinii (Lawrence) of Panama and wes- 

 tern Colombia, but under parts darker, more greenish, less yellowish; 

 the throat darker gray; and the crissum less rufescent. 



This is one of the species which has hitherto been supposed to range 

 unchanged from western Ecuador to Costa Rica, but comparison of a series 

 of nicely prepared skins from western Colombia with another from Costa 

 Rica develops the fact that the two are readily distinguishable from each 

 other. Colombian birds are much brighter below — nearer sulphine yellow 

 on the breast, with the crissum decidedly rufescent (near Sudan brown), 

 tinged with olive. In Costa Rican birds the breast is darker (deep warbler 

 green), the throat is darker gray, less strongly contrasted with the sides of 

 the head, and the crissum is more olivaceous, less rufescent. The species 

 was described from Panama, and birds from the type-locality are obviously 

 nearer the series from Colombia than to that from Costa Rica, leaving the 

 latter to be described as the new form. 



Type, No. 27,947, Collection Carnegie Museum, adult male; El Hogar, 

 Costa Rica, November 14, 1906; M. A. Carriker, Jr. 



Chlorospingus canigularis conspicillatus, subsp. nov. 



Similar to Chlorospingus canigularis canigularis (Lafresnaye) of the Cen- 

 tral and Eastern Andes of Colombia, but yellowish pectoral band slightly 

 deeper in color and much wider, and olive green of the sides and flanks more 

 extended. 



Dr. Chapman could find no racial differences in his series from the Co- 

 lombian Andes, but when uniformly and smoothly made up specimens are 

 compared the differences between the series from the Eastern Andes and 

 that from the Western Andes stand out very distinctly. The latter have 

 the greenish yellow breast-band slightly deeper in color and fully twice as 

 wide, while the olive green of the sides and flanks is more extended; the 

 size also averages larger. 



Hemispingus veneris Bonaparte (Compt. Rend., XXXVII, 1853, 922) 

 is the only synonym of this species. It was described from a specimen 

 whose exact locality is not known, but which was taken during the voyage 

 of the "Venus." Sclater, who examined the type in the Paris Museum, 

 considered it to be the same as Lafresnaye's canigularis. None of the other 

 birds taken on the "Venus" voyage came from this part of Colombia, but 

 there was one which was described from the " Bogota " region, and very 

 probably the type of veneris is from the same part. 



Type, No. 67,547, Collection Carnegie Museum, adult male; Bitaco 

 Valley, Colombia, July 6, 1918; M. A. Carriker, Jr. 



