158 BULLETIN 50, UNITED STATES NATIONAL MUSEUM. 



Coloration. — Plain olive or olive-brown above, lighter olive, yellow- 

 ish , or dull g"rayit>h below, with or without yellow on throat; pileuni 

 tiometinies urayi.sh or blackish, and sides of head sometimes with white 

 postocular spot or suj^erciliary stripe. 



Raw/c. — Southern Mexico to Bolivia. l*eru, and western Ecuador. 



I feel oblio-ed to exclude from this genus the species ranged by Dr. 

 Sclater, in the Catalogue of Birds in the British Museum (XI, p. :^3S). 

 under his Section B. { — HemispitK/n.s CaV)anis), some of which, at least, 

 including the type of JIeinisp'm<ju><., almost certainly belong to the 

 Mniotiltida3. 



KEY TO THE SPECIES OF CHLOKOSI'INGUS. 



a. Pileutu gray, l)row]i, ox sooty black, very different from olive-j^reen of back; chest 

 ami siiU'S yellowish olive-green or olive-yellow. 

 h. Malar region, chin, and throat white or l)uffy; chest yellowish olive, olive- 

 yellow or buffy yellow; whitish of alxlouien more extended, 

 c. Postaiiriciilar region light gray or brown; pileum brown, grayish, or sooty; 

 white i)Ostocular mark a spot beginning at upper eyelid and extending back- 

 ward not farther than end of auricular region (usually not so far) . 

 d. Postauricular region (sides of neck) light gray; pileum gray. 

 a. Pileum and hindneck slate-gray, liecoming dusky laterally; auricular 



region lighter gray. (Guatemala.) Chlorospingus olivaceus (p. 159) 



ee. Pileum and hindneck uniform dusky gray, the forelicad and crown some- 

 times almost grayish black; auricular region darker gray, ((luatemala; 

 Stateof Chiapas, southern Mexico.) . .Chlorospingus postocularis ( p. KiO) 

 dd. Postauricular region (sides of neck) brown; pileum l)rown. 



e. Postocular white spot large, extending to end of auricular region; malar 



region white (sometimes tinged with buff posteriorly); chest pale 



yellowish olive. 



/. Pileum darker or duller lirown; l)ack clearer olive-green; chest and 



sides brighter yellowish olive-green. (Southeastern Mexico, States 



of Vera Cruz, Puebla, and Oaxaca.) 



Chlorospingus ophthalmicus (i>. IHO) 

 ff. Pileum ligliter or brighter l)rown; liack more bro.vnish olive-green; 

 chest paler and duller yi-llowish olive. (^It. Azul, Vera Cruz.) 



Chlorospingus sumichrasti [y. 162) 

 ee. Postocular white sjxit small, not reaching nearly to end of auricular 

 region; malar region Iniffy; chest bright yellowish t)live, olive-yellow 

 or buffy yellow. 

 /. Pileum lighter brown (deep broccoli or drab); forehead and lores dis- 

 tinctly white anteriorly; throat wholly lirownish buff; chest buff y yel- 

 low or ochre-yellow. (Southwestern Mexico, in Stateof Guerrero.) 



Chlorospingus albifrons (p. 162) 



ff. Pileum darker brown (sepia or grayish sepia); forehead and lores 



wholly brown; throat white or brownish white, flecked with dusky; 



chest l)right olive-yellow. (Costa Uica to Venezuela and Bolivia.) 



Chlorospingus albitempora (p. 163) 

 vc. Postauricular region l)lack, like auricular icgion; pileum black or sooty black; 

 jMjstocnlar white mark a broad streak heginning above the eye and con- 

 tinued backward as far as taid of black of neck. (Costa Rica and Chiri- 

 qui. ) Chlorospingus pileatus ( p. 165) 



