PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 395 



shaft, though in some examples separated from the shaft by a very nar- 

 row streak of dusky. Chin, throat, and jugulum very pale ash-grav 

 (exactly the same shade as in 31. mexicanus and M. cinerascens), the remain- 

 ing lower parts sulphur-yellow (same as in mexicanus but deeper than 

 in cinerascens). Bill black, the mandible sometimes brownish, paler at 

 base ; iris brown ; legs and feet deep black. Wing 3.45-3.80, tail 3.20- 

 3.80, culmeu .60-.80, gonys .50-.G0, width of bill at base .35-.4:0, tar- 

 sus .78-90, middle toe .45-.52. (Six specimens.) 



Hah. — Southwestern Mexico (Tehuantepec) to Costa Eica (Pacific 

 side). 



The above diagnosis is drawn up from six specimens of a MyiarchuSj 

 which cannot be referred to either 3L mexicanus or M. cinerascens, 

 though evidently very closely related to both of them. All the specimens 

 hitherto seen are from the Pacific coastof Central America (Costa Rica to 

 Tehauntepec, southwestern Mexico), a region where either il/. ?/i^.ricaims 

 or M. cinerascens, or both, also occurs. It doubtless, however, represents 

 the resident form specially characteristic of the district named, the other 

 two occuring there as stragglers from other districts. In all respects, 

 except the iiattern of the tail-feathers, this form agrees to the minutest 

 degree with the two species named above, except that in M. cinerascens 

 the abdomen is a slightly paler sulphur-yellow. The most conspicuous 

 specific character distinguishing M. cinerascens consists, however, in the 

 terminal dusky space on the inner webs of the rectrices, of which there 

 is no trace in 31. mittingi. 31. mexicanus (in all its forms) has, on the 

 other hand, a broad and very distinct stripe of dusky next the shaft on 

 the inner webs of the rectrices, while in 31. nuttingi there is never more 

 than a mere indication of this stripe. Thus it may be seen that the 

 present form, whether species or race, cannot be referred to either of 

 the species named, and that it must, therefore, be considered quite as 

 distinct from them both as they are from one another. — R. R.] 



Rather common, more especially in open woods. Iris brown. 



Two specimens. 



No. 243. $ ad. April 24. 



No. 250. 9 ad. April 20. 



26. Rhynchocyclus ciiiereiceps Scl. 



Apparently not common. Two specimens secured in thick woods, 

 near the water. Iris ichite. Nest secured.* 



No. 227. $ ad. April 24. 



No. 279. $ ad. April 28. 



* The uest of this bird is a most remarkable structure, well worthy of descriptiou. 

 It is a pendulous inverted pouch, suspended from a single twig, composed almost en- 

 tirely of slender black filaments resembling horse-hairs (probably a vegetable fiber 

 related to, if not identical with, the " Spanish Moss," or Tillandsia of the Southern 

 United States), and so loosely built as to be easily seen through when held up to the 

 light. The entrance is at the extreme lower end, the nest proj^er being a sort of 

 pocket on one side, about 2 inches above the entrance. The total length of the entire 

 structure is 10 inches, the greatest width 4 inches, the lower **neck," or wall of the 

 entrance, being about 2^ inches in diameter. — R. R. 



