384 BULLETIN 18 6, UNITED STATES NATIONAL MUSEUM 



The adult of either sex has the forehead and forecrown rufous, 

 the feathers with obsolescent black shaft streaks ; the remaining upper- 

 parts light olivaceous-brown; the lores whitish; the ear coverts pale 

 buff; the chin and upper throat white (this color contrasting with 

 the rest of the lower plumage), the feathers with conspicuous black 

 shaft streaks; the remaining underparts warm buff; the edge of the 

 wing, the under wing coverts, and the axillaries pure white. 



STACHYRIS RUFIFRONS RODOLPHEI Deignan 



Doi Chiang Dao Rufous-fronted Babbler 



Stachyris rodolphei Deignan, Publ. Field Mus. Nat. Hist., zool. ser., vol. 24, 

 1939, p. 110 (Doi Chiang Dao, Chiang Mai Province, northwestern Thailand). 



Stachyris rufifrons rufifrons, de Schauensee, Proc. Acad. Nat. Sci. Philadelphia, 

 1934, p. 192 (Doi Chiang Dao). 



This bird is known by only three specimens, all from Doi Chiang 

 Dao : A female collected by de Schauensee at 5,500 feet, January 14, 

 1933, and two males taken by me at 3,825 and 3,525 feet, March 21, 

 1937. Though it may prove to be restricted in range to the type local- 

 ity, I suspect that it will be found to occur also on Doi Pha Horn Pok 

 and perhaps on other northwestern peaks. 



My examples, each of which had the gonads greatly enlarged, were 

 obtained in tall bamboo forest; they conducted themselves quite like 

 Mixornis g. sulphured. 



De Schauensee has noted that his specimen had the irides red ; the 

 bill dark gray ; the feet, toes, and claws olive. 



Following my original description, this form has the "front and 

 crown dull, dark rufous, with inconspicuous dark shaft -streaks; upper- 

 parts, including wings and tail, dark olivaceous-brown; lores and 

 feathers above eye pure gray ; ear coverts olive-brown ; edge of wing, 

 under wing coverts, and axillaries pale gray; chin and upper throat 

 pale gray with conspicuous black shaft-streaks and sharply defined 

 from the remaining under parts; lower throat and upper breast oliva- 

 ceous-buff, changing to a dull, light olivaceous-brown on rest of breast, 

 abdomen, flanks, and under tail coverts — the whole bird below darker 

 and duller than any [other] race of rufifrons." 



I am now of the opinion that Stachyris rodolphei may properly be 

 considered a mere subspecies of the rufifrons group. Such treatment, 

 however, for reasons stated under the following form, requires that 

 Stachyris "rufifrons" insuspecta be attached to the species ruficeps 

 (cf. Deignan, loc. cit., p. 112) . 



STACHYRIS RUFICEPS INSUSPECTA Deignan 



Thai Rufous-crowned Babbler 



Stachyris rufifrons insuspecta Deignan, Publ. Field Mus. Nat. Hist., zool. ser., 

 vol. 24, 1939, p. Ill (Thateng, Bolovens plateau, Bas-Laos). 



