49O DESCRIPTION OF THE MUSEUM. 



of this colour; they appear on the approach of 

 spring, as does the p. rhamni (n os i55 and 1 57). 

 We may also notice four French lepidoptera, 

 nearly allied to the danai : the two first, apollo 

 (h os 17 and 18) and semi- apollo (n os 19 and 20), 

 belonging to the genus par Jias sins, Latr., inhabit 

 the Alps, and are much sought after by ama- 

 teurs ; the two others, rumina (n° 75) and hjp- 

 sipile (n os 76 and 77), of the genus thais, Fabr., 

 are speckled with black and red on a yellow 

 ground, and are found in the southern depart- 

 ments of France. 



Next are the lepidoptera which, according to 

 Linnaeus, compose the section of the plebeii, sub- 

 divided into urbicolce and rurales. The first, 

 which are also named aPgus, fill two frames. 

 We shall notice as examples those little butter- 

 flies which are common in meadows and lucerne 

 fields (corydon, n° 1 3 1 ) , and which, at least in one 

 of the sexes, have the upper side of the wings of 

 a beautiful blue, and the under side of an ashy 

 colour with spots like eyes. The urbicolae, keep 

 their inferior wings nearly horizontal when at 

 rest; they are here united with the castnice under 

 the generic name of kesperice, given at first by 

 Fabricius to all the plebeii. 



The third section, that of the moths of Lin- 

 naeus, or nocturnal lepidoptera, is so numerous 



