268 BULLETIN 186, UNITED STATES NATIONAL MUSEUM 



differs in having the upperparts less glossy, the gorget unglossed 

 brown. 



Eirundo rustica tytleri, in which the entire underparts are chest- 

 nut, should be watched for among the flocks of gutturalis. An atypical 

 bird (tytleri> gutturalis) was collected by me at Ban Pha Tao (on 

 the Nan river just south of our area) , April 10, 1937. 



HIRUNDO SMITHII FILIFERA Stephens 



Indian Wire-tailed Swallow 



Hi[rundo]f filifera Stephens, in Shaw's "General Zoology," vol. 13, pt. 2, 1826, 



pp. 78-79 (India, ex Latham). 

 Hirundo smithii filifera, Deignan, Journ. Siam Soo. Nat. Hist. Suppl., 1936, p. 



99 (Chiang Mai).— Riley, U. S. Nat. Mus. Bull. 172, 1938, p. 267 (Salwin 



river). 



The status of the wire-tailed swallow is uncertain : It has been re- 

 corded only during the cold weather but will doubtless eventually 

 be found to breed on precipices along the larger rivers. At Chiang 

 Mai, between January 28 and February 14, 1936, one to four individ- 

 uals were constantly seen over a small marsh with large flocks of 

 common and red-rumped swallows, and one was collected January 30. 

 A second specimen was taken above the Salwin at Thattafang, Octo- 

 ber 13, 1936. The species should be looked for also along the Mae 

 Khong between Chiang Saen and Chiang Khong. 



In December 1935 I found this bird very common in the gorges of 

 the Mae Ping (just south of our limits), sailing over the river and 

 resting upon the large sand bars, in actions and notes resembling the 

 preceding form. 



My specimens had the irides brown ; the bill black ; the feet and toes 

 brownish black ; the claws black. 



The wiretail differs from the house swallow in having the entire 

 crown chestnut ; the "wires" of the outermost tail feathers much more 

 filiform ; the entire underparts immaculate white. Only the last char- 

 acter is ordinarily noticeable in the field. 



HIRUNDO STRIOLATA SUBSTRIOLATA (Home) 



Khasya Hills Striated Swallow 



L[illia~\ substriolata Hume, Stray Feathers, vol. 5, 1877, pp. 264-265 (Cachar). 

 Eirundo daurica nepalensis, de Schauensee, Proc. Acad. Nat. Sci. Philadelphia, 



1929, p. 561 (Chiang Mai, Chiang Rai). 

 Hirundo daurica nipalensis [partim], Deignan, Journ. Siam Soc. Nat. Hist. Suppl., 



1931, p. 153 (Chiang Mai [partim], Doi Suthep [partim]) ; 1936, p. 99 (Chiang 



Mai [partim], Doi Suthep [partim]). 

 Hirundo daurica nipalensis, Riley, U. S. Nat. Mus. Bull. 172, 1938, p. 267 (Doi 



Ang Ka). 



Striated swallows are irregularly common between October 8 (1936) 

 and July 24 (1930) in the valleys of the Mae Khong and the Mae 



