8 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. IO3 



mai may quite safely be called hlanfordi; a couple of worn summer 

 specimens from Mu'ang Fang are subspecifically indeterminable ; the 

 sole example yet known from Nan is discussed below. 



2. PRINIA INORNATA EXTENSICAUDA (Swinhoe) 



Dryuwica cxtcnsicanda Swinhoe, Ibis, i860, pp. 50-51 (Amoy). 



Range. — In Indo-China: Tongking, North Annam, High Laos. 



The single worn and discolored specimen from Nan, placed by 

 Riley * with "exter" because it "matches . . . perfectly" summer 

 birds from western Szechuan, in fact agrees equally well with similar 

 examples from Amoy {cxtensicauda) and from Mu'ang Fang (pre- 

 sumably hlanfordi). There is a possibility that the birds of Nan (and 

 perhaps of Mu'ang Fang as well) are indeed cxtensicauda (from 

 which, in my opinion, exter is inseparable) ; until, however, speci- 

 mens in good winter dress are known from those areas, we have not 

 the least evidence that they dififer from the population of Chiengmai, 

 which is certainly hlanfordi. 



3. PRINIA INORNATA HERBERTI Stuart Baker 



Prinia inornata herbcrti Stuart Baker, Bull. Brit. Orn. Club, vol. 38, p. 39, 

 1918 (Bangkok, Siam). 



Range. — East Siam and all Indochine, south of the territory occu- 

 pied by Pr. i. cxtensicauda. 



Riley- says: "In my opinion [Jierhcrti] is not a form of inornata 

 at all, but of Prinia blythi of Java, which should not be in the same 

 form group." He goes on to list differences between hlythi and 

 inornata, not one of which, from my point of view, is -of more then 

 subspecific value. Actually, the relationship of hlythi and herbcrti to 

 other members of the inornata group is much like that of polychroa 

 and cooki to other members of the polychroa group {vide infra). 



IV 



Prinia flaviventris, in one form or another, is now known to occur, 

 however rarely, at suitable localities in all parts of Siam and Indo- 

 chine. The greater part of the subregion is inhabited by a bird which 

 has always been called Prinia fi. flaviventris, but which, while agreeing 

 perfectly with that race in color, differs from it in its rather heavier 

 bill and its acquisition in winter of a tail only slightly longer than that 



*U. S. Nat. Mus. Bull. 172, p. 443, 1938. 

 ' Idem, pp. 442-443- 



