NO. 1153. REVISION OF THE GENUS THBYOMANES—OBERHOLSER. 445 



dition. Some of these are considerably darker on the upi)or ])arts than 

 is the type; others are appreciably lij>iiter. Si)ecinieiisin worn i)lunuige 

 are considerably browner, though not conspicuously paler. 



Young in first plumage appear to be (|uite uniform, and i)aler than 

 the young of charientHrm. The dusky spotting of tlie anterior lower 

 parts is apparently more consi)icuou8 than in any of the other forms 

 the young of which has been available, heicicldi and calophonus 

 excepted. 



Thirty-one specimens of Icucophrys have been examined, all from Sau 

 Clemente Island, California. 



THRYOMANES BEWICKII CERROENSIS (Anthony). 

 Tliryotliorufi ccrroennix Anthony, Auk, April, 18'J7, XIV, p. 1(16. 



Chars, siihsp. — Tliryomanes T. b. charienturo persimilis, sed rostro 

 breviore; iiec crisso late nigro fasciato. 



Measurements {5 specimens). — Wing, 49 to 51 (average, 50.4) mm.; 

 tail, 47.5 to 52 (average, 50.1) mm.; exposed culmeu, 12.5 to 13.5 (aver 

 age, 12.9) mm.; bill from nostril, 9 to 10 (average, 9.4) mm.; tarsus, 17.5 

 to 18.5 (average, 18.1) mm.; middle toe with claw, 14.5 to 10 (average, 

 15) mm. 



Type locality. — Cerros Island, Lower California. 



Geoyraphic disiribution. — Cerros Island, Lower California. 



Type. -Adult; No. 7391, Coll. A. W.Anthony; Cerios Island, Lower 

 California, September .'>, 18!)C; A. W. Anthony. 



Description. — Above slightly rufescent hair brown, rather darker on 

 head, more ruiescent on rump, the feathers of the latter with more or 

 less hidden white spots; upper tail-coverts hair brown, obsoletely 

 barred with dusky. Wings fuscous, the secondaries transversely 

 marked on outer webs with the color of the back; i)rimaries edged 

 basally with the same; margins of greater coverts, together with all of 

 the lesser and median series, of the same shade as the back. Tail 

 black, the central rectrices, together with basal portion of external 

 webs of all but outer pair, hair brown, regularly barred with black; 

 three outer pairs of feathers broadly terminated by dull smoke gray, 

 the remainder by hair brown; outermost pair marked transversely on 

 external webs with dull white. Superciliary stripe white; lores and 

 cheeks grayish white, somewhat mixed with brown; postocular streak 

 of same color as the crown; sides of neck brownish gray; chin and 

 throat white; rest of under surface grayish wiiite medially, smoke 

 gray laterally, deepest on flanks; crissum tinged with ochraceous, 

 barred with black; lining of wing grayish white. 



This island form is very closely allied to ckarienturus, from which, 

 however, it may be separated by somewhat smaller size — this jnost 

 appreciable in the bill— and by rather less heavily barred lower tail- 

 coverts. With the type and the few other specimens at present avail- 



