423 Zoological Society : — 



A typical FormicariiiSt a close ally of F. cayanensis, analis, &c., 

 but distinguished by its black throat, bordered beneath by a narrow 

 band of rufous ; white triangular spot on the lores ; and other dif- 

 ferences. It is the first of the form found to occur so far north. 



11. TODIROSTRUM CINEREIGULARE. 



Olivaceum : alts caudaque nigris, jiavicante olivaceo limbatis : orbi- 

 iis antice nigricantibus : loris albidis : subtus gutture et cervice 

 cinereis aut potius albis cinereo dense striolatis : pectore olivaceo : 

 abdomine toto et tectricibus subalaribus flavis : rostra compres- 

 siusculo, crassiusculo ; culmine carinato, incurvo ; colore nigri- 

 cante, tomiis pallidis : pedibus pallide brunneis. 

 Long, tota 3*6, alse 1*7, caudse 1'2. 

 Salle, no. 89, <? . Cordova. 



This Todirostrum difPers slightly in the form of the bill from 

 the ordinary members of the genus, that part being rather thicker, 

 and with the culmen elevated and more incurved than in the typical 

 species of the group. 



12. MUSCIVORA MEXICANA. 



" Megalophus mexicanus, Kp.," Bp. MS. 



Brunnea : uropygio, cauda tota et corpore subtus flavescenti-ochra- 

 ceis, gutture albidiore : alis extus ochraceo punctatis et subtus 

 (nisi priniariorum apicibus^ omnino ochraceis : crista ampla, 

 aureo-flava, c(erulescente aneo terminata : rostro productiore 

 quam in M. regia ; pedibus flavidis. 



Long, tota 6*0, alse 3*3, caudse 2*8, rostri a rictu 1*3. 



Salle, no. 78. Cordova. 



M. Salle's collection contains a single example of this interesting 

 bird, which however was not procured by himself, and is unfortu- 

 nately not in very good condition. It is probably the Megalophus 

 mexicanus of Dr. Kaup, which I have seen indicated in Prince Bo- 

 naparte's MS., but which I believe is merely an unpublished name. 

 From the common Muscivora regia, to which it offers a close general 

 resemblance, it may be distinguished by its longer bill, and having 

 the base of the crest of a paler yellower tint, and the tips with less- 

 purplish colouring. 



The Muscivora castelnauii (Onychorhynchus castelnauii, Deville, 

 R. Z. 1849, p. b^), the only other member of the genus hitherto 

 known, from Eastern Peru, on the other hand appears to have a 

 shorter bill and more reddish crest than the typical species. 



13. Tyrannula sulphureipygia. 



Olivacea : pilei crista mediali flava : uropygio pallide sulphureo : 

 alis caudaque nigris, secundariis extus brunnescente limbatis : 

 subtus Jlavicanti- brunnea, gula et ventre medio flavis. 



Long, tota 5-2, alee 2*8, caudae 2*3. 



Salle, no. 84. Cordova. 



Obs. Aff. T. harbatce ex America Meridionali, sed statura majore, 

 colore uropygii pallidiore et corporis subtus brunnescentiore distin- 

 guenda. 



