31. acanthis. 235 



olivaceous. Pileum indistinctly streaked with dusky ; sides of the 

 head and neck dull olivaceous, lighter than the crown and nape ; 

 chin and throat still paler, the feathers pale ashy beneath the sur- 

 face ; rest of lower parts dull, light olivaceous, tinged with deeper 

 olive across the breast and along the sides. Maxilla blackish, paler 

 along the edge ; mandible whitish ; legs and feet light brownish (in 

 dried skin) ; " iris pale blue." Wing 2 - 50 inches, tail 2-20, culmen 

 # 58, commissure 065, tarsus 0*80, middle toe O60. 

 Eab. Volcan de Irazu, Costa Rica. 



31. ACANTHIS*. 



Type. 



Acanthis, Bechst. Orn. Tasckenb. p. 125 (1S03) A. linaria. 



Linaria, Vieill. Analyse, p. 30 (1816, nee Bechst., nee 



Botan.) A. rufescens. 



Cannabina, Brehm, Isis, 1828, p. 1277 A. cannabina. 



Linota, Bp. Comp. List B. Bur. Sf N. Amer. p. 34 (1838) A. cannabina. 



^Egiothus, Cab. Mas. Hein. Th. i. p. 161 (1850) A. linaria. 



Linacanthis, Des Murs, Encl. Hist. Nat. part 5, p. 304 



(le54) A. rufescens. 



Acanthys, Des Murs, Traite cFOol. p. 334 (1862). 

 Agriospiza, Sundev. Av. Meth. Tent. p. 32 (1872) f. . . . A. flavirostris. 

 Cf. Stejneger, Auk, i. p. 145 (1884). 



Range. The greater part of the Pakearctie and Nearctic Regions. 



Key to the Species. 



a. Without any red on the forehead or breast. 

 a'. Rump rosy. 



a". Throat and breast tawny buff, the 

 latter slightly streaked with brown 



centres to the feathers ; bill dusky . . jiavirostris rf , p. 236. 

 b''. Throat creamy buff; fore neck and 

 breast ashy white, with broad black 



centres to the feathers ; bill yellow . . brevirostris tf , p. 239. 

 b'. No red on the rump. 



c". Sides of face dark ashvhke the head; ) f ■ ,,. , • n" 

 bill dusky ynngimrosms % , 



d". Sides of face clear tawny buff like I Jiavirostris J , p. 237. 

 the throat ; bill yellow | brevirostris 5 , p. 239. 



* Acanthis brewsteei. 



iEgiothus flavirostris, var. brewsterii, Bidgw. Amer. Nat. 1872, p. 433; 



Baird, Brewer, if Bidgw. Hist. N. Amer. B. i. p. 501 (1874). 

 iEgiothus brewsteri, Brewst. Bull. Nutt. Orn. Club, vi. p. 225 (1881). 

 Acanthis brewsterii, Bidgw. Proc. V. S. Nat. Mus. p. 354 (1885) ; A. 0. U. 



Check-list N. Amer. B. p. 354 (1886). 



" The type specimen, taken at Waltham, Mass., remains unique. It cannot 

 be identified with any known species, but may be a hybrid between Acanthis 

 linaria and Spinus pinus." (A. O. TJ. Check -list, I. c.) 



t Professor Sundevall here alludes to his genus Agriospiza as if it had 

 been published before ; if so, the description has escaped my efforts to discover it. 



