130 TTRANNIDiE. 



Similar to T. semiflavics, but cap not so distinct, and brownish in 

 tint, and not carried so far back : body beneath not so bright. 

 Hob. Panama. 

 A. somewhat doubtful species; a southern form of T. semifiavus. 



a. Ad. sk. Panama (McLeannan). Sclater Coll. 



b. 6 ad. sk. ; c. Lion Hill St., Panama {Mo- Salvin-Godman Coll. 

 Ad. sk. Leannan). 



d. Ad. sk. Panama. Purchased. 



50. TYRANNISCUS *. 



Tyranniscus, Cab. et Hein. Mus. Hein. ii. p. 57 



(1859) T. nigricapillus. 



Tyranniscus is a name conferred by Cabanis and Heine on a 

 group of small Tyrants allied to Tyrannulus,but with a rather broader 

 bill ; longer wings and longer tail. They are diffused over the 

 Neotropical Region from Guatemala to S. Brazil, but mostly pre- 

 valent in Colombia, Ecuador, and Peru. They are, in fact, little 

 more than diminutive forms of Elainia, or at any rate form a 

 transition toward that genus. 



Key to the Species. 



A. Bill uniform, blackish. 

 a. Cap different from hack. 



a'. Wing-coverts broadly tipped with 

 white or yellowish white ; belly 

 yellow. 



J Cap blackish 1. nigricapillus, p. 131. 



I Cap plumbeous 2. cinereiceps, p. 131. 



b'. Wing-coverts narrowly edged with 

 yellow ; belly yellowish. 

 a". Breast pale cinereous. 



J Larger ; crown cinereous .... 3. vilissimus, p. 132. 

 | Smaller ; crown not so different. 4. parvus, p. 132. 

 b". Breast cinereous, washed with 



yellowish 5. improbus, p. 133. 



c". Breast pale yellowish. 



j Larger ; throat uniform 6. gracilipes, p. 133. 



| Smaller ; throat whitish 7. acer, p. 133. 



e'. Wing-coverts edged with pale oliva- 

 ceous 8. griseiceps, p. 134. 



b. Cap olivaceous like the back. 



j Front uniform 9. bolivianos, p. 134. 



"j Front yellow 10. chrysops, p. 135. 



B. Bill with lower mandible white 11. leueoyonys, p. 136. 



* I do not recognize the following species: — Elainia viridijlava, Tsch. F. P., 

 Aves, p. 160, t. ix. fig. 2 {-Leptopoyon virid 'iflavus, Bp. Cousp.i. p. 187 =Tyran- 

 niscus riridiflauus, Tacz. P. Z. S. 1874, p. 536; id. Orn. Per. ii. p. 201), from 

 Peru. 



