196 PROCEEDINGS OF SOCIETIES. 



hind, the projecting upper margin of the truncature ending in two 

 short horns, curving out and backwards, and ending each in a simple 

 spiracle of a black colour ; the under side, more in advance, is furnished 

 with two larger recurved horns, or false feet, beset, especially at the 

 tip, with microscopic prickles. The base of the spiracular processes is 

 also beset with smaller prickles inclining backwards. Immediately in 

 front of the lower horns is a single prickly papilla in the middle line, 

 and at each side of the preceding segments, about the incisures, there 

 is a limited space furnished also with prickles. The first two (oral) seg- 

 ments are very small and retractile, blackish and transversely wrinkled ; 

 the mandibles blackish, linear, slightly curved ; the fourth segment (pro- 

 thorax) has a small spiracle at each side close to the anterior margin. 



The pupa case, 3 lines long, and of a dark chestnut colour, is fusiform, 

 the greatest breadth before the middle, the sides a little crenated, the 

 surface entirely reticulated with concave dots, most regularly on the 

 posterior segments ; the two small anterior segments still marked with 

 transverse wrinkles, the two pair of curved horns behind also remaining 

 nearly as in the larva. 



The flies that I reared came out in the middle of June, but the 

 greatest number of the pupae remained unchanged at that time. 



Mr. Hallday read also, from Professor W. Smith, F.L.S., Correspond- 

 ing Member — 



MEMORANDA, CHIEFLY BOTANICAL, OF AN EXCURSION TO THE PYRENEES IN 

 THE SUMMER OF 1856. PART III. 



(Concluded from p. 50.) 



The route from Cauteretz to St. Sauveur, which follows the Gave de 

 Cauteretz in its descent to Pierrefitte, and the Gave de Bareges in as- 

 cending to Luz, presents a constant succession of fine mountain views. 

 At Luz the gorge expands into a valley, and a bifurcation of the stream 

 takes place, which, here separating, leads by its principal branch, under 

 the name of the Gave de Gavarnie, to the romantic village of St. Sauveur, 

 and the great "sight" of the Pyrenees — the Cirque of Gavarnie. We 

 followed the stream to St. Sauveur, and found comfortable rooms in the 

 Hotel de France, commanding an excellent view of the Pic de Bergons, 

 which rises to the height of 7080 feet. The view from the summit of this 

 mountain is said to be one of the finest in the Pyrenees, and the ascent may 

 be made on horseback ; but unfortunately the weather during our stay 

 was uncertain, and the sky obscured with clouds, so that the labour of as- 

 cending would have been thrown away as far as the view was concerned, 

 and we were obliged to content ourselves with rambling in the gorge, 

 on the edge of which the village is most picturesquely situated, raised 

 about 150 feet above the torrent that roars below. 



The season was getting too late for general Botany, and the neigh- 

 bourhood of St. Sauveur did not supply me with many novelties. One 

 species of fern, however, the Asplenium fontanum, grew in abundance 



