203 THE ENTOMOLOGIST. 



moss-covered rocks and boulders with a deafening noise ; fre- 

 quently it is seen at the bottom of a steep ravine three or four 

 hundred feet in depth, while the mountains rise immediately 

 above the path in a precipitous manner, forming romantic 

 gorges and defiles, such as the Gorge de Pierrefitte and the 

 Gorge de St. Sauveur, box and arborescent heath, besides a 

 multitude of other shrubs, trees, and plants, growing out of the 

 crevices of the rocks in all conceivable ways and means. Land- 

 slips and other convulsions of nature have produced some won- 

 derful wildernesses and scenes of desolation in certain places, 

 such, for instance, at the Chaos of Heas and the Chaos of 

 Gedre, where rocks and boulders of all shapes and sizes are 

 strewn about in endless confusion for several miles in extent. 

 On a moonlight night especially the appearance they present is 

 weird in the extreme. Here and there they produce a most 

 remarkable life-like appearance, many of the rocks being vested 

 with almost a human aspect as they rise above the sky-line in 

 all sorts of angles and attitudes. 



The scenery of the Pyrenees is on the whole wilder than that 

 occurring in the Alps, at least according to what has been my 

 experience as the result of three visits to the latter range ; but 

 it is certainly not so grand, althongh here and there it is almost 

 equally magnificent. Accommodation is not so good as in the 

 Alps, there being no hotels or mountain chalets at high altitudes, 

 so that much more exertion is necessary in order to reach 

 elevated situations. Instead of roads one has frequently to 

 traverse a narrow track or mule-path in order to visit some 

 out-of-the-way village, such as Heas, where the fastidious may 

 not find the food always to their satisfaction, although I am 

 prepared to rough it wherever I go. 



The following is a list of the Pihopalocera which I met with 

 in the Hautes-Pyrenees ; no mention is made therein of those 

 which I obtained on the Spanish side of the chain, as they 

 would be out of place in this paper. I have also given the 

 localities, the approximate altitudes above the sea-level in 

 parentheses, and added a few notes respecting morphology and 

 relative frequency, &c. 



Papilionid/e (three species). 



Papilio machaon. Scarce ; Gorge de Pierrefitte, Port de Gavarnie 

 (2000-5500 ft.). Ground colour rich yellow. 



Faniassius apoUo. Abundant everywhere, especially at the Gorge 

 de Pierrefitte, Heas, Gavarnie, Chaos de Gedre, &c. (2500-G500 ft.). 

 The sexual dimorphism is very pronounced, the males being respec- 

 tively lighter and the females darker than is the case in the Alps. I 

 obtained between fifty and sixty ova from one female, which I kept in 

 a warm room upon my return home, and they all hatched out between 

 the 2ud and the 4th of January this year. Not having any sedums to 



