from the region of the Straits of Gibraltar. 369 



different. {P. napi, L., is said to occur both at Gibraltar 

 and Tangier, but I did not meet with it.) 



P. dajAidice, L. — Also a generally common insect, but 

 most numerous in the cork-woods of Almoraima, bej^ond 

 San Eoque, where it flies from March to November ; on 

 the Eock of Gibraltar I have taken it as early as January 

 18th. The larva is found on Biscutella microcarpa, 

 DeC., and other Cruciferce. 



Euchloe belemia, E. — Common in open sunny places 

 throughout the whole region, especially at Gibraltar and 

 the adjacent Spanish district. This butterfly is often 

 to be seen on the wing on fine days even before 

 Christmas (it was common at Tangier on December 

 9th, 1887), but is most plentiful in February and 

 March. About the end of April the second brood 

 (ab. glauce, Hb.) appears, and lasts until the middle 

 of June. It has a very strong, swift, and erratic flight, 

 and is by no means easy to catch. The beautiful 

 pink-striped green larva is found not rarely on Biscutella 

 and other Cruciferce (of which it prefers the flowers) in 

 April. 



E. helia, E. — Only once found on the Eock of Gibraltar, 

 and quite rare in the adjoining district, where, however, 

 I have seen it as early as January 28th. At Malaga I 

 found it fairly common at the beginning of April, 1888, 

 but I did not observe it at all on the African side of the 

 Straits. The var. Ausojiia, Hb., was taken at San 

 Eoque on March 31st, and at Malaga on April 30th, 

 1888. 



E. tagis, E. — Very common in sunny open spots in 

 the cork-woods in March and April, but not observed 

 elsewhere, except at Malaga, where I found the var. 

 hellczina, E., rarely at the beginning of April, 1888. 

 First seen on the wing March 26th, 1887 ; in its flight 

 it is similar to E. helia. 



E. cardamincs, L. — This species is reported to be not 

 rare in the cork-woods, but I met with it there on only 

 one occasion (April 8th, 1887), when it was quite scarce. 

 The three males then taken are large and fine, but differ 

 very slightly, if at all, from British specimens. 



E. eupheno, L. — Eestricted to the African side of the 

 Straits, where it replaces E. euphenoides, Stand., and is 

 not rare at Tangier and Benzus Bay ; I have taken it as 

 early as March 10th at the first-mentioned locality 



