250 BIRDS OF TUNISIA 



C. duponti occurs, and instead of the dark green wild thyme and 

 similar plants of the plains further north, one more often meets with 

 Haifa-grass and semi-desert scrub-plants. 



What I have written in the preceding article regarding the song 

 and the habits generally of C. duponti will apply equally to the 

 present subspecies. The mode of nesting is also probably the same 

 in both forms, and although I have no nests or eggs of C. d. margarita 

 in my collection, judging from the description of them given by 

 Erlanger (/./. 0. 1899, p. 373) and Alessi (/. /. 0. 1892, p. 314), I 

 should conclude that neither differ appreciably, if at all, from those of 

 C. duponti. According to Alessi, who found the species breeding in 

 the neighbourhood of Gabes, nesting in that district commences 

 earlier than it does further north, as by the middle of March full 

 clutches of eggs may be found, and young birds on the wing are to 

 be met with in April. 



