5o PASSERES 
like back. Eye region and broad superciliary stripe black, or silky grey (4. fuliginosus). Throat 
and foreneck white, throat (in 4. /eawcogenys also the chin) often black or grey; remaining under 
parts buff, ferruginous or vinaceous isabelle, sometimes a brown band across chest. Feet light 
brown. Bill black. 
Geographical Distribution. India, Western- and Southern China. Eleven forms, 
Habits and Nidification. — Exactly like 4:githalos. 
Observations. The members of this genus differ from :githalos chiefly by having the 
tail much shorter and far less graduated, the outermost rectrix being about two-thirds as 
long as the tail, Two groups can easily be arranged, one comprising the rufous-headed 
species, 4. erythrocephalus, to which the scarce A. leucogemys most likely also belongs, while 
the other consists of 4. niveogularis, A. bonvaloti, A. iouschistos and the somewhat aberrant 
A. fuliginosus. 
KEY TO THE SPECIES AND SUBSPECIES OF A:GITHALISCUS ») 
1. Throat black. Bill short and thick, with culmen strongly 
Mecurved: os. Ao he em ee om ee Pe er eS ct 
— Throat never black, being either white or silvery grey ; some- 
times the dusky bases of the feathers, especially on sides 
of throat showing through, without forming, however, a 
plain, black throat-patch. Bull slender, longer, with 
culmen much lessidecuvued. © 11 ks pu Seton ee 7 
2. Chin and throat black ; ear coverts greyish brown. (Breast and 
abdomen buffy isabelline, inclining to deep buff on flanks ; 
pileum pale dull reddish bvown.) . . . . . . . «6, A. LEUCOGENYS. 
— Chin white, abruptly contrasted with black of throat. Ear 
couerts, deep black like remainders sides af head ee) ees) ee 
3. With a distinct white eyebrow from above the eye to sides of 
neck; under parts below black throat-patch buff, dark- 
ening to vinous ochraceous on sides and flanks. (Top of 
head chestnut-rufous) . . . . . . . . . . 1. A. ERYTHROCEPHALUS ERYTHROCEPHALUS. 
— No distinct white eyebrow, the posterior superciliary region 
being black, sometimes narrowly streaked with white; black 
thyoat-patch followed by a well-defined, pure white jugu- 
lar crescent; a narrow band across chest as well as sides 
and flanks ochraceous or fervuginous, abruptly contrasting 
with white centre of breast and abdomen, or else whole 
lower parts below white jugulay band uniform ferru- 
PUMOUS.. no eee ae ge re) crm em 
4. Posterior superciliary region distiictly, though narrowly 
1) A. shaype: Rippon, unknown to the author, coul not be included in the key. From the short diagnosis : « Similis 
A. bonvaloti, sed regione parotica saturate brunnea, nec postica cinnamomea, et torque collari brunneo distinguendus » (!) 
it is even impossible to say to which other species this supposed new form might be most nearly allied. 
