43 



print in the ' Comptes Rendus ' for April 3, 1854, in connexion 

 with M. luteiventris, which I have described above ; but it also 

 occurs in the catalogue of birds collected in Cayenne by M. Des- 

 planches* (p. 11), where it is applied to T. audax. The division 

 seems a natural one, connecting Pitangus and Tyrannus. I possess 

 specimens of six species, namely — 



1. Myiodynastes audax (Gm.) : ex Cayenna, Brasil.,Nov. Grenad., 

 ins. Trinit., et Peruv. int. 



2. Myiodynastes luteiventris. 



3. Myiodynastes solitarius (Vieill.), Azara, sp. 1960: ex Brasil, 

 merid. et Paraguay a. 



4. Myiodynastes nobilis. 



5. Myiodynastes atrifrons (Tyrannus atrifrons, Sclater, P. Z. S. 

 1857, p. 2/4) : ex rep. Equat. 



6. Myiodynastes chrysocephalus (Tsch. ). — Scaphorhynchus chry- 

 socephalus, Tsch. Faun. Per. pi. 8. fig. 1 ; Lafr. Rev. Zool. 1848, 

 p. 5. 



The last species has the bill rather more flattened, and leads off 

 towards Scaphorhynchus, 



4. Contopus mesoleucus, sp. nov. 



Obscure cineraceus, olivaceo vix tinctus, pileo alis et cauda nigri- 

 cantibus, secundariis dor so proximis albo extus marginatis : 

 subtus obscure cineraceus, vitta longitudinali a rnento corpus 

 descendente cum ventre toto albo, Jlavicante tincto, hypochon- 

 driiset crisso cineraceo adumbratis : fasciculo plumarum utrin- 

 que ad latera uropygii, alis obtecto, albo : rostro nigro, mandi- 

 bulce inferioris basi fiavida : pedibus nigris. 



Long, tota 6'75, alee 4*0, caudee 2*7. 



Hob. In Mexico meridionali, et in rep. Guatemala (Skinne?*). 



This bird is easily recognizable by the creamy-white medial line, 

 which passes from the chin to the crissum, expanding greatly on the 

 belly. My examples are from Orizaba, collected by Botteri. Mr. 

 Gould possesses a specimen from Guatemala of the same species. 

 The form is quite typical, — the wings being very long, and the second 

 primary, which is the longest, considerably (by 0*15 inch) exceed- 

 ing the first and third, which are equal. The curious white tufts 

 at the side of the uropygium, covered by the wings, are very notice- 

 able in this species — more so than in my examples of C. borealis. 



5. Contopus sordidulus. 



Obscure cineraceus, tectricum majorum et secundariorum margi- 

 nibus dilutioribus, fere albicantibus : loris albidis : subtus pal- 



* This little tract is extracted, I believe, from the Memoires of a learned Society, 

 published at Caen. The only copy I have ever seen was given to me by the 

 author himself in 1857, shortly before his death. In it is established a new genus 

 of Tyrannida — Planchesia — for Muscicapa fuliginosa, Gm. (PL Enl. 574. fig. 1) ; 

 and the generic term Syrichtlia, the type of which appears to have been unknown 

 to Mr. Gray, is used for Tyrannus curtipes, Sw. 



