96 On the Genera Microbates and Rhamphocaenus. • 



all througli Central America into Colombia. My R. sanctce- 

 marthcB is^ I now tliinkj not to be separated. The prominent 

 white tips to the lateral tail-feathers and the full rufous belly 

 render this species easily distinguishable from the two former. 

 Subgen. B. Microbates : cauda brevi fere quadrata. 



4. Rhamphoc^nus cinereiventris. 



Rhamphoccenus cinereiventris, Scl. P. Z. S. 1855, p. 7Q^ 

 pi. 87; 1858, p. 244; Scl. et Salv. Nomencl. p. 73. 

 Olivaceo-brunneus; capitis lateribusrufis; gutture albo, nigro- 

 cinerascenti striato ; abdomine cinerascente, medialiter 

 albescentiore, lateraliter obscuriore ; cauda nigricanti- 

 fusca : long, tota 4*0, alae 2"0, caudse 1"3. 

 Hab. Colombia, Pasto [Delattre) ; Ecuador, Sarayacu 

 [Buckley] . 

 Mus. Derbiano, P. L. S. et S.-G. 



4-5. Rhamphoc^nus semitorquatus. 



Rhamphoccenus semitorquatus, Lawr. Ann. L. N, Y. vii. 

 p. 469 (1862); Salvin, P. Z. S. 1867, p. 145 (Veragua), 1870, 

 p. 195 (Veragua); Scl. et Salv. Nomencl. p. 73. 



Rhamphocanus cinereiventris, Scl. et Salv. P. Z. S. 1879, 

 p. 525 (Antioquia). 



Prsecedenti similis, et ventre obscuriore necnon gutturis striis 

 fortioribus vix dignoscendus. 



Hab. Veragua [Arce), Panama, Antioquia [Salmon). 



I am rather doubtful about the propriety of retaining this 

 northern form of the last species as distinct ; but as they have 

 been already separated, I allow them to remain so. The 

 Antioquian bird must, however, go with the Central- American 

 form. 



6. RHAMPHoCiENUs coLLARis. (Plate III.) 



Ramphocanus collaris, Pelz. Orn. Bras. p. 84, et p. 157 

 (1871). 



Microbates torquatus, Scl. et Salv. Nomencl. pp. 72, 161 

 (1872). 



Hab. Guiana et Amazonia inferior. 



Mus. P. L. S. 



