LEPIDOPTERA 99 



species common on the hills of the Middle West is the 

 Dogs-head, a form slightly larger than the common sul- 

 phur but with the black markings 

 so arranged as to picture a dog's 

 head in profile on each front wing, 

 though some imagination may be 

 necessary to see the picture. 



A group of whites which have 

 the tips of the front wings suffused 

 with orange is known as the 

 orange-tips and forms the third 

 group of Pierids. They are less 

 common than the whites and yellows. 



60 Lycaenidae. The Gossamer- 

 wings are the smallest and most 

 delicate of the butterflies. Included 

 here are the " blues," the " cop- 

 pers" and the " hair-streaks." 

 The larvae are small and slug-like. 

 The chrysalids are supported like 

 those of the two families already 

 described, but they are never an- 

 gular in outline. The early stages 

 in this family are seldom seen. 

 There are several species of the blues 

 that are familiar objects. They 

 frequent moist places and often are FIG. 73. Types of But- 

 found about the culverts in a country terflies. First four, 



road. They may also be seen flying P * l \ iour > Ly ' 



coemdce. Reduced one- 

 over any meadow . Some of the blues half. 



have very delicate tails on the 



hind wings. This is true also of several *' hair-streaks." 



Their larvae feed largely on plants in the pea family. 



