ALGERIAN BUTTERFLIES. 87 



But the summer brood of this butterfly in Algeria seems to present a 

 very fine form. In one female I have, taken by my courier near 

 Sebdou in July, the ground colouring is most brilliant, and the abdomen 

 is entirely yellow, thus being analogous with the form zanchcia of 

 poduliriKs. Unluckily the very rapid flight of this insect prevented my 

 taking others ; however, one which I failed to catch I saw was dis- 

 tinctly the same, and another in a very mutilated condition, which I 

 took later, had evidently also belonged to this form, which would, I 

 suppose, be considered an extreme of var. aurantiaca , Spr. 



Tliais rumina, L. — Taken rarely at Hammam R'Irha in April. I 

 also came across a small colony near Blidah on May 18th ; and at 

 Teniet in the forest, &c.. it was common in certain places where the 

 Aristolochia grew in May and June. The specimens from Hammam 

 R'Irha have the red blotches on the upper wings very nearly replaced 

 with black. All the Algerian specimens are paler in colour than those 

 I took some years ago in Andalusia. 



Aporia cratiet/i, L. — Abundant at Teniet in May and June. 



Pieris brassiccB, L. — At Hammam R'Irha and other localities in 

 April and May. 



P. rapcp, L. — Not very common at Biskra and El Kantara in March. 

 In the cedar forest above Blidah in May I took a perfectly white male, 

 entirely devoid of all black markings above and beneath. 



P. najn, L. — In both the cedar forests in May. 



P. daplidice var. raphani, Esp. — This is a very marked form of the 

 summer brood ; in some of the male specimens the yellow-green 

 markings on the lower wings, under side, are almost entirely confined 

 to the outer margins, leaving the central area creamy white. With 

 the female it was less so. This butterfly was extremely common all 

 round Sebdou in July ; I also observed it at Tlem9en. 



Anthocharis bdemia, Esp. — At Biskra and El Kantara in March; 

 var. glance at Blidah and Teniet in May. 



A. falloui, Allard. — Quite distinct from the preceding species, and 

 with a little practice can even be distinguished from it on the wing. 

 It flew on the tops of all the desert mountains round Biskra ; but 

 seems entirely confined to the region of the desert, not occurring even 

 so far " inland " as El Kantara. 



A. belia, Cr. — At El Kantara in March (1902). Also near Blidah 

 (cedar forest) in May. Most of the Algerian specimens are small, and 

 have an inclination to black markings along the outer margins of the 

 hind wings, especially in the females. 



A. pechi, Stgr. — This seems to be a rare butterfly in collections ; 

 but it flew commonly enough on all the mountains near El Kantara in 

 February and March (1902). In 1904 the season was so backward 

 that I did not see a sign of it till April 6th, and then it was still 

 very rare, apparently only just emerging. It does not seem to 

 descend into the desert region, and always flies where there is plenty 

 of alfa grass. 



A. charlonia, Donz. — This extremely pretty little butterfly flies 

 commonly in February and March round El Kantara and at Biskra, 

 where it is to be found in company with A. falloui on the tops of the 

 desert mountains. 



A. eupheno, L, — Abounds everywhere north of the Atlas Mountains; 



