1904.] NATURAL SCIENCES OF PHILADELPHIA. 459 



chin, lores, cheeks, and auriculars less ashy; entire upper and lower 

 surfaces, including the wings, much more strongly rufescent. 



Geographical Distribution. — Costa Rica. 



Description.— Ty^e, adult male, No. 64,819, U. S. N. M. ; Talamanca, 

 Costa Rica, 1873; J. C. Zeledon. 



Upper surface deep reddish mummy-brown, rather paler and more 

 grayish on the pileum, lighter and somewhat more rufous on the rump, 

 the longest upper tail-coverts chestnut ; tail chestnut ; wings chestnut, 

 the exposed surface rather duller and slightly tinged with olivaceous, 

 the tips of outermost primaries broadly fuscous, the inner inargins of 

 the quills basally ochraceous, all the superior wdng-coverts mummy- 

 brown, somewhat less rufescent than the back; a short, narrow, poorly 

 indicated ochaceous postocular stripe ; lores dull brownish-gray; sides 

 of head dull mummy-brown, the auriculars with paler shaft streaks ; 

 chin dull grayish-brown, lighter than the remainder of the lower surface 

 which, excepting the chestnut under tail-coverts, is dull, dark, rufescent 

 tawny-olive brown; lining of wing tawny-ochraceous. Wing, 115; 

 tail. 96; exposed culmen, 2%f tarsus, 25.5; middle toe, IS. 



This new species appears to be undoubtedly most closely allied to 

 Dendrocincla olivacea lafresnayei. From D. olivacea olivacea, whose 

 territory it inhabits, it differs in much the same respects as from lafres- 

 nayei, but more strongly. The type and sole specimen has been for 

 some years in the U. S. National Museum collection, and has been 

 successively identified as D. merula, D. olivacea and D. atrirostris! It 

 seems to be undoubtedly a distinct and hitherto undescribed species, 

 for its peculiarities are not such as appear readily or satisfactorily 

 explainable on grounds of individual variation. It bears its present 

 name in honor of Mr. Robert Ridgway, as a shght token of the author's 

 appreciative esteem. 



Dendrocincla meruloides meruloides (Lafresnaye). 



Dendrocops meruloides Lafresnaye, Rev. Zool., 1851, p. 467. 

 Dendrocincla merulina Cabanis and Heine, Mus. Hein., II, 1859, p. 34 (nom. 

 emend, pro Dendrocops meruloides Lafresnaj'e). 



Type Locality. — "Cote ferme" (= British Guiana). 



Geographical Distribution. — British Guiana. 



Similar to D. ridgwayi, but smaller and more brightly colored; 

 cheeks and chin more rufescent; superior wing-coverts and wing- 

 quills less inclined to olivaceous. 



The type of this species, which is now in the Museum of the Boston 

 Society of Natural History, along with the rest of the Lafresnaye col- 



^^ Tip of maxilla broken. 



