592 
Mr. J. H. Stenhouse : 
[Ibis, 
Hirundo r. rustica. 2 $ . 
First seen 13 February, 1919, and in 1920 on 7 February. 
Observed collecting mud for nests on 7 March, and at 
Laguna de la Janda had young nearly fledged on 29 April. 
The breeding birds took their departure from Gibraltar 
about 15 August, when it was noticed their numbers had 
greatly diminished. After that date their appearance was 
irregular and they were considered migrants from the north. 
On 22 October after a strong east wind they arrived in 
hundreds. They were last seen 7 November. 
Hirundo rufula. 1 £ . 
A single bird was seen at the Laja del Ciscar near Laguna 
de la Janda on 26 April, 1919, hawking for flies in company 
with Martins and Crag-Martins. On 2 May, 1920, a pair 
were seen at Don Pedro Cliff about eight miles distant from 
Ciscar. They were settling down collecting mud and were 
evidently preparing to breed. Where these birds were 
found was about thirty miles distant from the Moorish coast, 
and as they are found in Morocco there is no reason they 
should not, at times, cross the Straits. Col. Verner 
informs me that a bird of this species had been seen in the 
same neighbourhood several years before. 
Delichon urbica meridionalis. 2 £ ; 4 $ . 
First seen in 1919, 29 March, and in 1920,14 March. They 
breed in large numbers at Algeciras and in many cliffs 
around. The breeding birds at Algeciras left the district in 
the first week of August, and only odd birds were seen after 
the 7th of that month. The wings of two males measure 
105 and 101 mm., of the four females 100, 101, 102, and 
105 mm., being, with the exception of one male, within the 
measurements given for this subspecies. This one bird is 
also the only one whose measurement between secondaries 
and the tip of the wing equals that of typical birds measured. 
Under these circumstances, and taking into account that in 
autumn the local birds migrate two months before the 
northern birds appear, I consider the placing of them, for 
the time at least, in this group justifiable. 
