70 BASSES 
and that the eggs of the latter species are uniform blue, while those of S. g. gularis have grey 
and brownish spots on a whitish ground-colour. 
Observations. While admitting that several species, e. g. S. r. ruficeps, S. r. atrosuper- 
ciliaris, S. f. fulvifrons, S. f. cyanophrys etc. have a much blunter bill than the various races of 
S. webbiana or S. conspicillata, I find S. poliotis and allies so completely intermediate in the 
shape of the bill that I have not ventured to draw a line between Suthora and Chleuasius. 
S, wnicolor has perhaps better claims for generic separation, on account of its large size and 
uniform coloration, though I do not see why it should not be included in the present genus. 
Still I have serious doubts as to whether the group as here defined is a natural one, The 
proportions of wing and tail are not the same in all species. In S. mipalensis, S. gularis and 
allies, and S. foliotis with its relatives, the tail but little exceeds the wing, while this organ is 
much more elongated in S. przewalskii, S. fulvifrons, S. conspicillata, S, alphonsiana and the races 
ot S, webbiana. Yet S, viuficeps stands between the two groups, so that I have deemed it best 
not to make any subdivision. On the other hand, S. davidiana and S. thompsoni are very 
different in structural characters from all the species here included in Swthora. 
KEY TO THE SPECIES AND SUBSPECIES OF SUTHORA | 
i Larger : wing more than So, tail about roo mm. Upper parts brown, 
pileum tinged with vinaceous, lores and superciliary streak blackish, 
throat and sides of neck greyish brown, breast and abdomen dull 
fulvous, chin washed with vinaceous . . . . . . .. . 1. S. UNICOLOR. 
— Middle-sized : wing 70-75, tail So-85 mm. Top and sides of the 
head, and nape cleay fervuginous, strongly contrasting with the 
pale olive-brown of the back and the white of the throat. . (S. RUFICEPS). 
1 
= olmaller ware (considerably ess than Ovni. 2 se) ie eee) kre) es eee 
2. No black streak over the eye. Under parts white, faintly shaded with 
creamy on chestand sides . . . . . . » «. . . « « 2. 9. RUFICEPS RUFICEPS. 
— A narrow black streak over the eye. Under parts tinged all over with 
deep huge ok Os SS ORUBICEES ATROSUPERGIMIARISE 
3. With a large black patch on the throat, sometimes half-concealed by 
OLA SSM OCICS 6 6 lO A A 4. 
—  Nolblack whatever on theithnout 2) sae) eae no 
Top of the head smoky grey, broad superciliaries from forehead to 
+ 
nape black, throat-feathers black, edged with rusty, vest of under 
parts ovange-fuluous. SE NTPAENSIS- 
— Top of the head never grey, either orange-ochvaceous or olive-yellowish. 
Thyoat-feathers either uniform black or edged with white; vest of 
under parts whitish, more or less shaded with greyish or fulvous 
across chest, flanks washed with greyish, fulvous or yellowish byown. . . . . . . . . +. + OO 
5. With a long, broad superciliary stripe of black. . . . . . . . 2. . ss se ss ss 6 
== INoiblack-superciliary stripe.) (Jn, ao ee ee) ee 9- 
6. Ear coverts bright orange. Black superciliaries broader and confluent 
on forchend  - ws hf ah 3g og bee ace Se ao ee SEO osm meneame: 
