Mr. R. Eidgway 07i the Genus Empidonax. 461 



distinct species which I have been able to examine, viz. E.fus- 

 catus (Max.), E. fringillaris, Pelz., and a very strongly- 

 marked species from Tobago, which Mr. Lawrence has doubt- 

 fully determined as E. oliva (Bodd.). These three species 

 differ as follows : — 



a^. Upper parts umber-brown, the wing-bands ochraceous 



or rusty. 



&'. Lower mandible with basal half light-coloured 



(whitish in dried skins). Wing 2-70-2-00, tail 



2-75-2 85, exposed culmen •48--52, tarsus '70. — 



Hob. Southern Brazil E. fuscatus. 



h-. Lower mandible entirely dusky ; plumage darker 

 throughout. Wing 2-85, tail 2"85, exposed cul- 

 men -50, tarsus -70. — Hab. Eastern Brazil (Bahia) E./rmgiUuns. 

 a-. Upper parts greyish hrown, the wing-bands greyish 

 buff, or isabelle colour. 

 b^. Lower mandible entirely dusky. Wing 2-75, tail 

 2-80, exposed culmen "55, tarsus -72. — Hab. 

 Tobago E. oliva ? 



Should the Tobago bird prove distinct, I propose for it the 

 name Empid.ochanes vireoninus, the general appearance of 

 the bird suggesting a rather large " Vireosylvia " with 

 distinct wing-bands. Regarding the identification of the 

 Muscicapa oliva of Boddaert with either of the three 

 species characterized above, I have only to remark that 

 the figure (PI. Enl. 574. fig. 2) upon which it is based presents 

 not the least resemblance to either of them, so far as I 

 am able to see. 



XLIII. — On the Species of the Genus Empidonax. 

 By Robert Ridgway. 



From the genus Empidonax I would remove the following 

 species: — (1) E, atriceps, Salv., which seems to me much 

 closer to Mitrephanes, if not strictly congeneric with M. 

 phaeocercus and M. aurantiiventris ; and (2) ^. w«wws, Lawr., 

 which I have made the type of a new genus [Lawrenceia), 

 characterized in the July ' Auk,' p. 382. 



On the other hand, I would add to the genus Mitrephanes 

 fulvifrons (Scl.), which, so far as I can see, difi'ers from the 



