HOW TO KNOW THE IMMATURE INSECTS 



44a. Anal plate bifurcated; head roughly papillose; 3rd ocellus very 

 large. Fig. 474 Family SATYRIDAE 



About 60 described species are re- 

 corded in North America. The caterpil- 

 lars chiefly live on grasses and cereals. 

 The rice butterfly, Melanitis leda (L.), is 

 Fig. 474. Oeneis mocounii Edw. a pest of rice, barley, bamboo and sugar 



cane in Asia. 



44b. Anal plate simple; head smoother; 3rd ocellus rarely much en- 

 larged 45 



45a. Spiracles ellipticaL larger; prolegs short 46 



45b. Spiracles circular, small; prolegs slender, more or less stem-like, 

 with expanded planta. Fig. 475 Family PTEROPHORIDAE 



More than 350 species have 

 been described. Most larvae are 

 stem borers and leaf rollers. Some 

 are of economic importance as 

 pests of ornamental plants and 

 agricultural crops. The adults are 

 the plume moths so named be- 

 cause of their finely split wings. 



Fig. 475. Grape-vine plume. Oxyptilus 

 periscelidactylus Fitch. 



46a. Body with dense secondary setae. 

 Fig. 476 



,47 '/■''■:4^. 



"^/^A^rjerM 



Fig. 476. A body 

 segment showing 

 the primary setae 

 and secondary se- 

 tae. 



46b. Secondary setae very sparse or absent above prolegs; with 

 simple setae or a few subprimaries 48 



167 



