1885.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 563 



isli. lu the specimen of true glahrirostris (No. 30,652, Half Moon Bay, 

 British Honduras, May 10, 1862) the plumage is less glossy, especially 

 on the rump and upper tail-coverts, Avhile the bill and feet, as nearly as 

 can be told from their mutilated condition, appear to be weaker. The 

 differences are at most very slight, however, and unless perfectly con- 

 stant would not sufl&ce for the separation of the Cozumel bird even as a 

 local race. 



Very abundant, and said to be a very brilliant and melodious song- 

 ster. 



Family TROGLUDYTID.E. 



-f- 6. Troglodytes beani, Ridgw. 



Troglodytes hcani, Ridgw. Descr. New Sp. B. Cozumel, Febnuiry 26, 1885, 1. 



Sp. char. — Largest species of the genus (wing, 3.10-2.20 ; culmen, .75 

 or more). Above grayish brown, becoming more of a burnt-umber tint 

 posteriorly, the tail and wings rather distinctly barred with dusky, the 

 other upper parts either perfectly plain or with barely discernible nar- 

 row bars of a darker tint on lower back, etc. Lower parts white, the 

 jugulum and sides tinged with brown, the flanks decidedly brownish; 

 lower tail-coverts light rusty, tipped with white and barred with dusky. 



Adults (type, IsTo. 102,473, U. S. Nat. Mus., Cozumel, January 28, 

 1885) : Above plain brown, more grayish anteriorly, and more of a burnt- 

 umber cast i^osteriorly, especially on the rump, where the feathers have 

 concealed, subterminal, large guttate spots of white, the basal portion 

 being slate-colored. Tail and wings duller umber than rump, narrowly 

 and indistinctly barred with dusky. Lower parts white, purest on the 

 malar region, chin, throat, and abdomen, the sides and flanks pale 

 fulvous- brown, the lower tail-coverts light rusty, tipped with white and 

 barred with blackish. Maxilla black, the tomium paler ; mandible 

 with terminal half dusky, the basal half light yellow ; legs and feet 

 horn color. Fifth and sixth quills longest ; tail graduated for .30 of an 

 inch. Wing, 2.20; tail, 1.00; culmen,. 81; bill from nostril, .50 ; tarsus, 

 .80 ; middle toe, .50. 



Four of the five specimens have no indication of bars on the lower 

 back, rumi), or upper tail-coverts; the filth, however (No. 102,474, 

 S ad.), has very indistinct and narrow darker bars on all these portions. 



The only species which this one resembles in coloration is the T. 

 inq^iietus, Baird, from Panama, which, however, is much smaller, and 

 uifters in other characters. 



Family MNIOTILTID^. 



-{-7. Mniotilta varia (Liuu.). Three specimens. 



-f- 8. Compsothlypis americana (Liuu.). Seven specimens. 



_f 9. Dendroica petechia ruflvertex, Ridgw. 



Dendroica petechia riifivertex, Ridgw. Descr. New Sp. B. Cozumel, February 

 26, 1885, Ij Proc. U. S. Nut. Mas., VIII, 1885, 348 (detailed description and 

 comparison with allied forms.) 



