422 
Rev. H. B. Tristram on the 
Ammomanes pallida. It would be remarkable and unusual were 
the same species, which is migratory as far as the Arctic circle, 
to be found resident on the arid plains of Arabia and Africa 
under conditions so dissimilar from those of its northern habitats. 
73. Calandrella brachydactyla. (Short-toed Lark.) 
Many flocks occur in winter in the neighbourhood of the 
oases and on the northern limits of the Sahara. It breeds abun¬ 
dantly under the slopes of the Atlas, but not, so far as I am 
aware, in the Desert. 
74. Calandrella reboudia, Loche, MSS.; Ibis,vol. i. p.58. 
(Reboud's Lark.) 
I have retained the name given to this bird, in honour of 
Dr. Reboud, a zealous Algerian naturalist, by Capt. Loche, 
although he has not yet published a description of the species. 
It differs from C. brachydactyla in having the outer portion of 
the external rectrices of a pure white, and the beak much shorter 
and stouter, besides the usual pale coloration so distinctive of 
Desert birds. It is, unlike its congener, a permanent resident in 
the Desert, and has a wide lateral range, as I have obtained it 
in the western Sahara, and have received a female specimen, with 
a nest of four eggs, taken a little to the south of El Djem, in the 
Regency of Tunis. The eggs are like large varieties of C. brachy¬ 
dactyla. I am not aware of the two species ever occurring in the 
same localities. The present is most probably merely a Desert 
form of its congener. 
75. Ammomanes isabellina (Temm.); Consp. Av. p. 244. 
(Desert-Lark.) 
Occurs first on leaving the Hants Plateaux in small numbers, 
but is more plentiful further south, inhabiting the open plains, 
where it is difficult to conceive how it finds subsistence. Its lateral 
range is wide. I have obtained it from the frontiers of Morocco 
to Arabia Petrsea. It is sedentary, and breeds both in the 
Algerian Sahara and in the wilderness of Judsea, in both which 
localities I have taken the nest, neatly formed of grass in a de¬ 
pression under a tuft of weeds, and with four eggs, in size nearly 
equal to those of Galerida cristata, but never so elongated, mea¬ 
suring 11 lines by 8 lines, of a rich cream colour, blotched, 
