HOW TO KNOW THE IMMATURE INSECTS 



95a. 3 large and 2 or 3 small ocelli on each side ol head; appendix 

 of mandible tail-shaped. 

 Fig. 292 Subfamily Byturinae, DERMESTIDAE 



It includes a single genus By- 

 tuTus with few species. Both adults 

 and larvae are injurious to rasp- 

 Fig. 292. Byturus unicolor Say. berries. 



95b. 1 ocellus on each side of head; appendix of mandible lobe-like. 

 Fig. 293 Family ANTHICIDAE 



Well over 1,000 species of these 

 rather small beetles have been 

 described. They are widely scat- 

 Fig. 293. Anthicus heroleus Csy. ^^^^^ ^^^ O^^^^ ^^^7 numerous. 



96a. Abdominal spiracles located in disk-like sclerites. 



Fig. 294 Family EURYSTETHIDAE 



Only a few species are recorded in 

 America for this family. All of them are 

 on the west coast. 



Fig. 294. Eurystethus caiiforni- 

 cus Melsh. 



96b. Abdominal spiracles not located in disk-like sclerites 97 



97a. Mandible without molar structure; larvae parasitic with swollen 

 abdomen. Fig. 295 Group Bothriderini, COLYDIIDAE 



The larvae of several species 

 of Bothrideres have been noted to 

 be ectoparasites or predators of 

 other coleopterous larvae. 



Fig. 295. Derataphrus oregonensis 

 Horn. 



97b. Mandible with molar structure. 

 Fig. 296 



98 



ill 



