HESPERID^. 169 



rows of Ijluck triaiigulav spots crossing them. The row of spots near 

 the outer margin is tipped externally with yellowish-brown, while 

 the other spots are outlined with gray. There are several clear white 

 spots distributed on the wings, as shown in the illustration. The lower 

 wings are brown with two rows of faint yellowish-brown spots near 

 their outer margins. The Ijody is l)Iackish-brown. The larva feeds 

 on willow and po[)lar. 



^Pw 



Pliolisora catuUus. 



A much smaller species related to the foregoing is Fholisora 

 catulhis. In this insect the wings and body are black, or very dark 

 blackish-brown, and the wings are unadorned, save with a line of 

 small Avhite spots near the a[)ex of the fore wings. The head and 

 palpi also have a few small white dots. This little butterfly is dis- 

 tributed over the whole United States. 



In the genus Pamphila is assembled a large numl)er of species 

 (over one hundred being inliabitants of tlie United States) of small, 

 stout-bodied butterflies, distributed over the whole continent, and 

 often very abundant in point of number. The antennte usually end 

 in a club with a pointed recurved tip. In coloring they are gener- 

 ally dark brown with spots or markings of yellow or yellowish-brown. 

 The sexes are generally separated without difliculty by the males 

 having a strongly marked oblique brown sti'ipe on the forward wings. 

 These insects al)ound in tlie tields and meadows, being particularly 

 l)lentiful alono- flowino- streams wliere the sweets of various kinds of 

 wild flowers tempt them to remain. In walking through the rank 

 grasses and Aveeds beside a bi'ook or pond, one may find dozens of 

 them in June, July and August, and a large number of species may 

 be taken in such localities. A good many will l)e ruined in the net, 

 however, as they move their wings so rapidly wlien captured that 

 often ■ only the torn fragments of tliem remain wlien taken out. 

 When disturbed they fly ra[)idly with a jerking motion, and again 

 alight after moving but a few feet. A good many of them fall a 



