OBEREOLSER ] \ THE AVIAN GENUS BLEDA 165 
STELGIDILLAS Oberholser 
Stelgidillas OBERHOLSER, Proc. U. S. Nat. Mus., xxu, 1899, p. 30. 
Chars. gen.—Similar to Arizelocichla, but maxilla with several 
(3 to 4) subterminal notches; bill proportionately longer and more 
slender, its height at base less than one-third the length of exposed 
culmen, the culmen nearly straight except’ at tip; rictal bristles 
much shorter ; nuchal hairs not noticeably branched. 
Description.—Tail slightly more than nine-tenths of wing, but not 
equal to wing; throat feathers not lengthened; tarsus rather lightly 
scutellate ; wing about 4 times the length of tarsus; tarsus about 14 
times the exposed culmen; head not crested; nuchal hairs short, not 
appreciably branched; rictal bristles short and weak, reaching but 
little beyond the anterior edge of nostrils; bill rather long and 
comparatively slender, depressed, equal in height and breadth at 
anterior edge of nostrils, broader than high at base, the height at 
the latter point less than one-third the length of exposed culmen; 
culmen only slightly curved—nearly straight, except at tip; gonys 
almost horizontal, though a little ascending; maxillar tomium with 
several (3 to 4) subterminal notches, of which the distal one is the 
most pronounced ; nostrils almost linear, much operculate, the oper- 
culum feathered, though rather sparsely, on its basal half; nasal 
bristles few and rather short. 
Type.—Andropadus gracilirostris STRICKLAND. 
This peculiar genus forms the first transition step from the long 
billed forms with a single subterminal maxillar notch, to the short 
billed ones with a serrate maxilla. The unbranched nuchal hairs 
show some relationship with Trichophorus, while the much length- 
ened nostrils indicate its affinity with such groups as Arizelocichla, 
Acritillas, and Argaleocichla. 
There seems to be but a single species referable here, which with 
its several subspecies, is as follows: 
Stelgidillas gracilirosiris gracilirostris (Strickland). 
Stelgidillas gracilirostris liberiensis (Reichenow). 
Stelgidillas gracilirostris poensis (Alexander). 
Stelgidillas gracilirostris percivali (Neumann). 
CALYPTOCICHLA’ nom. nov. 
Trichites Heine, Journ. f. Ornith., 1860, p. 139 (type Criniger serinus 
Verreaux) (nec Lycett 1850). 
Chars. gen.—Similar to Stelgidillas, but nasal operculum densely 
feathered quite to anterior margin; bill relatively shorter, higher 
* KaAvntéc, coOpertus; KiyvAy, turdus. 
