162 SMITHSONIAN MISCELLANEOUS COLLECTIONS [voL. 48 
tained in the length of wing; bill longer and relatively more slender, 
the culmen almost straight; rictal bristles much weaker. 
Description.—Tail about nine-tenths of wing; throat feathers not 
lengthened ; tarsus slightly scutellate; wing about 534 to 6 times the 
length of tarsus; tarsus only about five-sixths of exposed culmen; 
head not crested; nuchal hairs short, not branched; rictal bristles 
rather weak, reaching about one-third the length of bill, and scarcely 
beyond the nostrils; bill lengthened, somewhat compressed, higher 
than broad at anterior edge of nostrils; not quite so high as broad 
at base, the height at base about equal to one-third the exposed 
culmen; culmen only slightly curved—almost straight except at tip; 
gonys distinctly ascending; maxillar tomium with but one sub- 
terminal notch; nostrils more or less linear, much operculate, the 
frontal feathering not extending beyond their posterior edge; nasal 
vibrissze long and moderately numerous. 
Type.—Criniger affinis HoMBRON and JACQUINOT. 
The species of this genus, though heretofore included in Tricho- 
phorus, are really very different in structural details from the typical 
members of the latter, and indeed are much more closely allied to 
Phyllastrephus, Argaleocichla, and several other African groups. 
From all the related genera with lengthened nostrils Thapsimillas 
may easily be distinguished, however, by its very short tarsus, this 
being considerably less than the exposed culmen. 
The following species belong here : 
Thapsinillas affinis (Jacquinot and Pucheran). 
Thapsinillas mystacalis (Wallace). 
Thapsinillas longirostris (Wallace). 
Thapsinillas platenae (W. Blasius). 
Thapsinillas aurea (Walden). 
ACRITILLAS’ gen. nov. 
Chars. gen.—Somewhat similar to Bleda, but nostrils linear, 
operculate ; nuchal hairs not appreciably branched ; bill much shorter, 
more slender, depressed, the culmen curved from base, the gonys 
nearly or quite horizontal; tarsus decidedly longer than culmen. 
Description.—Tail a little more than nine-tenths of wing; throat 
feathers not lengthened ; tarsus at least slightly scutellate; wing 4% 
to 434 times the tarsus; tarsus 1% times the exposed culmen; head 
not crested; hairs on occiput and nape short, not branched; rictal 
bristles reaching from one-third to one-half the length of the bill; 
bill rather slender, somewhat depressed, higher than broad at anterior 
1 axpitoc, confusus; tAAac, turdus. 
