1919-] Birds of the Canary Islands. 311 



According to Hartert (Nov. Zool. xx. 1913, p. 73), the 

 majority perhaps winter in the Sahai'an oases. 



(Enanthe deserti homochroa. Tristram's Desert-Wheatear. 



Saxicoln homochroa Tristram, Ibis, 1859, p. 50 — Type 

 locality : Tunisian Sahara. 



Tlie western form of the Desert-Wheatear is a Rare 

 Visitor to the Canary Islands. 



Only four examples are known to have been obtained, and 

 three of these I have examined in the Tring Museum. 



All were collected within three days by Herr von 

 Thanner. 



a. S. Tenerife, 24. ii. 03 (not quite adult). 



b. S- Tenerife, 25. ii. 03 (adult). 



c. S ' Tenerife, 25. ii. 03 (adult) . 



The fourth example, a female, does not appear to be in 

 the Tring- Museum. 



The above specimens were first referred to by Ritter 

 von Tschusi, Avho wrote (Orn. Jahrb. 1903, p. 176): "von 

 Thanner informed me that lie had killed on the 21 Feb. 1903 

 a S. aiirita ^ . On the 24th of the same month (February) 

 (J ? of /S. stapazina and on the 25th three males/^ Next 

 they were mentioned in the Nov. Zool. 1904, p. 431, where 

 von Thanner wrote " in the preceding year I was able to 

 collect in one morning .... Sa.cicola deserti . . . . ," men- 

 tioning three other rare visitors as well. 



(Enanthe stapazina is, according to Hartert, synonymous 

 with (E. hispanica hispanica (the Spanish Wheatear), but 

 there is no doubt at all that the tliree male birds in the 

 Tring Museum enumerated above are examples of (7?. deserti 

 homochroa (Tristram's Desert-Wiieatear), and have nothing 

 to do with (E. stapazina or CE. hispanica. 



Tschusi certainly mentions both (E. stapazina and 

 CE. aurita in his paper, but both these names are 

 synonymous ! 



The original labels of von Thanner show that the three 

 birds which we now know to be (E. deserti homochroa were 

 first erroneously named stapazina by the collector, who 



SEE. XI. — VOL. I. z 



