372 Mr. J. J. Walker's notes on Lepidoptera 



any ordinary net ; but I have taken the female on flowers 

 in company with T. sjjini and T. ilicis. The earliest date 

 on which it was observed is May 31st. 



T. quercus, L. — Another somewhat scarce species in 

 the Gibraltar district, having been taken sparingly on 

 Quercus lusitanica in the stone-pine plantation (com- 

 monly known as the " Fii'st Pine Wood ") about a mile 

 north of San Eoque. First seen July 7th, 1887. 



T. ruhi, L. — Common near San Eoque (apparently 

 not found on the Rock), also at Tangier. At the former 

 locality I have observed it on February 28th ; it is quite 

 over by the first week in April. 



Thestor halhis, Hiibn. — Generally abundant ; at Gib- 

 raltar it is to be found in March and April in waste flowery 

 places and on the glacis of the fortifications, and it is 

 equally common at Malaga and Tangier. It is very 

 active on the wing, the male especially, and is partial 

 to the flowers of Fedia cornucopicBy DeC, one of the 

 Valerianecs which abounds on the Eock. The male 

 occurred in 1888 as early as February 7th ; the female 

 has not been seen before March 9th. 



T. mauritanicus, Lucas. — I had the good fortune to 

 meet with this rare and curious little butterfly on April 

 1st, 1887, at Tangier, when I found it common, but 

 getting somewhat worn, in an exceedingly restricted 

 locality about two miles south-west of the town, near the 

 Guadalhorce or " Jew's Eiver." I again found it in 1888 

 on March 10th, and in 1889 on March 23rd, in the same 

 spot — a space not 30 yards square, beyond which not 

 one was to be seen, in the midst of miles of precisely 

 similar scrub-covered country. The male flies close to 

 the ground, and for a short distance only at a time, 

 much less rapidly than its congener T. halhis : it 

 invariably settles on the bare spots of ground among the 

 low bushes, where it is easily caught. The female is 

 either much scarcer, or flies less readily than the male, 

 as I have taken only one female to about seven males. 



PolyommatiLs phlceas, L. — Very abundant everywhere 

 throughout the year, especially the summer form eleus, 

 F. ; the autumn and winter specimens are very brightly 

 coloured, the var. eleus being met with from Ajjril to 

 September. 



Lijccena hostica, L. — Common almost all the year 

 throughout the Straits region, being often seen in the 



