THAYER AND BANGS: AVES. 169 



Szechwan ; ten specimens including young and adults were secured in spring and 

 summer, 1908. 



Hartert having examined the type, pronounced it a young bird and synony- 

 mous with M. temminckii temminckii Vigors (Die vogel der palaarktischen 

 fauna, p. 676). 



Our series contains six fully adult breeding birds, taken between the dates 

 of May 18 and August 24, and as none of these show even the slightest indica- 

 tion of white spots so conspicuous on the rump and sides of M. temminckii and 

 M. caerukus, we believe that Hartert was mistaken in his disposition of the 

 species. M . tibetanus is moreover of a rather duller blue color generally than M . 

 temminckii, and the shiny blue spots are smaller both above and below. 



HETEROXENICUS CRTJRALIS FORMASTER, sub. sp. nov. 



Four specimens, an adult male, two young males, and an adult female, 

 Washan Mountain, western Szechwan, 9,000 to 10,000 feet, May 31 to June 4, 

 1908. 



Type: No. 51970 M. C. Z. adult d*. Western Szechwan: Washan Moun- 

 tain, 10,000 feet, May 31, 1908. W. R. Zappey. 



Characters: Very similar to true H . cruralis (Blyth) of the eastern Himala- 

 yas, but larger; the adult male with the blue parts much grayer blue, less indigo; 

 the adult female, duller, more olivaceous, less russet-brown. Thus, the new 

 form seems to be in general color like H. sinensis (Rickett) of northwestern 

 Fukien (which we have not seen) but is larger and has the lores black as in true 

 H. cruralis. 



Measurements: Type, adult G?, wing, 73; tail, 47; tarsus, 34; culmen, 

 14. Adult 9 , Topotype No. 51973, wing, 70; tail, 45; tarsus, 32.5; culmen, 13. 



Remarks: This bird was found only on Washan Mountain, where it 

 lived in the rhododendron thickets; it was shot with great difficulty. There 

 is no doubt that it is very closely related to true H. cruralis on the one hand and 

 to H. sinensis on the other, still it differs from both in its larger size, and from 

 each in other slight characters; and we believe it must be regarded as represent- 

 ing a distinct subspecies. 



TESIA GRALLATOR, sp. nov. 

 Plate 5, figs. 1, 2. 



Type: No. 51975 M. C. Z. adult 9 . Western Szechwan: Washan Moun- 

 tain, 10,000 feet, May 31, 1908. W. R. Zappey. 



