312 LEPIDOPTERA. 



of silk. They remain in their cocoons without further 

 change throughout the winter, and are transformed to but- 

 terflies in the following summer. The viscid locust-tree is 

 sometimes almost completely stripped of its leaves by these 

 insects, or presents only here and there the brown and 

 withered remains of foliage, which has served as a tempo- 

 rary shelter to the caterpillars. 



Mudamus Bathyttus, Smith. Bathyllus Skipper. (Fig. 135.) 



In Massachusetts we have what I suppose to be only a 



local varietv of the Bathyllus 



Fig. 135. . .• 



skipper, differing from South- 

 ern specimens in the inferior 

 size of the white spots on the 

 fore wings, the less prominent 

 hind angle of the hind wings, 

 and the darker color of the 

 fringes. It is of a dark brown color ; on the fore wings is 

 a row of small white spots across the middle, and another 

 shorter row of only three or four contiguous spots between 

 the first and the tip ; the wings beneath are light brown, 

 shaded at the base with dark brown ; the hinder pair with 

 a slightly prominent posterior angle, and two dark brown 

 transverse bands. 



Expands from 1J to l T 7 ff inch. 



This species is found on flowers in June and July ; in the 

 Southern States it appears also in March and April. The 

 caterpillar is very similar to that of the Tityrus skipper, and 

 is found on various kinds of Glycine, Hedysarum, &c, in 

 May and June. 



The rest of our skippers belong to the old genus Hesperia 

 of Fabricius, which, as now restricted by the French ento- 

 mologists, very nearly coincides with Pamphila of the Eng- 

 lish writers. The American species are quite numerous, 

 and moreover vary a good deal ; which, with the difference 

 existing between the sexes, renders it quite difficult to deter- 



