LEPIDOPTERA. US) 
(Fig. 171), which is found in the month of July in sub-alpine 
regions; the Chionobas aello (Fig. 172), which is found in the 
Alps of Switzerland, of the Tyrol, and of Savoy, and which is 
common enough, in the month of July, on the summit of Mon- 

Fig. 173.—Meadow brown (Satyrus (Hipparchia) janira). 
tanvers, near the mer de glace; the Satyrus janira, or Meadow 
Brown (Fig. 173), which is very common, in the months of June 
and July, in woods and fields. 
We now pass on to the second section of Lepidoptera. 
It contains those whose flight in the majority of species is nocturnal 
or by twilight, but by day in some species. The antenneé are more 
or less swollen out in the middle or before their extremities, and, 
independently of that, sometimes prismatic, sometimes cylindrical, 
sometimes pectinated or indented. The body—mhich was small in 
comparison to the wings, and which was remarkably thin between 
the thorax and the abdomen in the first section of Lepidoptera—is 
in this section very much larger in proportion to the wings, and is 
not drawn tightly in between the thorax and the abdomen. The 
mings are horizontal or slightly inclined when the insect ts at rest ; the 
upper then cover the lower, which 
are generally comparatively short 
and kept back by a bridle on the 
Jirst, in the case of the males only. 
We will take the genus Sesia 
as the representative of the 
Sesiide@. ‘These singular insects 
have membranous wings, and re- 
semble various species of Hyme- 
noptera. The largest species is 
the Sesia apiformis (Fig. 174), that is, bee-like, which is found in 

Fig. 174.—Sesia apiformis. 
