32 bi'lletin: museum of comparative zoology. 



The specimen which proves to he the type of Tardus nivncapillus 

 Lafr. was entered hy ^'erreaux in the Catalogtie of tlie Lafresnaye 

 Collection as Bisisonornis swamsoni Bp. A careful comparison of 

 specimens proves that Lafresnaye's bird is what has been currently 

 called Cossxjpha irrticalis Hartlaub. Lafresnaye's name must, of 

 course, be used for the species, antedating Hartlaub's by twelve years. 



Races of Saltator Striatipictus Lafresnaye. 



^^'e ha\e before us a series of 104 skins of Soltator striatipictus, a 

 careful study of which forces us to recognize six races, two of which 

 are here described as new. It is possible to find examples of one race 

 which agree very nearly with some of another, but the different races, 

 in series, stand out very definitely. 



Young birds are more heavily marked and darker below than adults, 

 and old birds in breeding plumage are somewhat grayer abo^•e than 

 they are in winter or autumn. 



1. Saltator strl\tipictu8 furax, subsp. nov. 



Type.— ^L C. Z. 11S,65L Adult d". Western Costa Rica: 

 near Boruca. 27 May, 1906. C. F. Underwood. 



Characters. — Similar to Saliator striatipictus striatipictus Lafresnaye, 

 differing in being slightly smaller, and much darker below; the stripes 

 on the under parts very \\'ide and hea^•y and olive-green; the dark 

 stripes cover the whole under parts often including the belly, and tend 

 to coalesce at the sides of the breast and sides of the neck. This form 

 is most nearly related to S. striatipictus istkmicus Sclater; it is of about 

 the same size, but much darker and greener below and more hea\'ily 

 striped. The very darkest specimens of isthmicus (possibl^^ immature 

 birds) resemble closely the very palest examples of the new form. 



Measurements. — Type, adult cf ; A\ing, 90; tail, 82; tarsus, 22.5; 

 exposed culmen, 18. 



Specimens examined. — Twenty-one from western Costa Rica; 

 Boruca, Lagato, and El General. 



2. Saltator striatipictus isthmicus Sclater. 



Saltator isthmicus Sclater, Proc. Zool. soc. London, 1861, p. 130 

 (Panama). 



Type-locality. — Panama. 



