LEPIDOPTERA 



699 



latipennis, which is found in the Rocky Mountains and in the Pacific 

 States, in the foot-hills of the Sierra Nevadas. The wings of this 

 species are black spotted with 

 yellow. There is some varia- 

 tion in the niunber and size of 

 the spots on the wings. Figure 

 884 represents a specimen tak- 

 en in Colorado. This is the 

 variety known as vermictildta. 

 The larva feeds on Merten- 

 sia; when full-grown it meas- 

 ures about 30 mm. in length. 

 The body is blackwith sulphur- 

 yellow interrupted bands and 

 steel-blue tubercles. There are 



three pairs of the blue tubercles on each side of each segment ; each 

 tubercle bears some short whitish hairs. 



Gnophcela lalipennis. 



Family ARCTIID^ 

 The Tiger-Moths and Footman-Moths or Arctiids 

 The Arctiidae includes stout-bodied moths, with moderately broad 

 wings, which in the majority of cases are conspicuously striped or 



spotted, suggest- 

 ing the popular 

 name tiger- 

 moths; some of 

 the species, how- 

 ever, are unspot- 

 ted. A large pro- 

 portion of the 

 species are ex- 

 ceedingly beauti- 

 ful; this renders 

 the famly a fa- 

 vorite one with 

 collectors. As a 

 rule, when at 

 rest, the wings 

 are folded, roof- 

 like upon the 

 body. Most of 

 the moths fly at 

 night, and are at- 

 tracted to lights. 

 The ocelli are 

 present in the 

 first subfamily, 

 absent in the 

 Fig. 885.— Wings of Halisidota sp. other two. The 



