ARTHROPODA. 



137 



Magdalis. 



Balaninus. 



Anthonomus. 



Orchestes. 



Tychius. 



Sibinia. 



Cionus. 



Gymnetron. 



Laemosaccus. 



Haplonyx. 



Camarotus. 



Alcides. 



Cholus. 



Homalonotus. 



Guioperus. 



Acalles. 



Cryptorhynchus. 



Cratosomus. 



Mecomastyx. 



HETEROMERA. 



Head narrowed behind into a neck TRACHELIDA. 



Head not narrowed behind ATRACHELIA. 



TRACHELIDA. Head exserted, narrowed behind into a neck. 

 Antennas never clavate (Tetratoma excepted). Claws often bifid. 



In the larval state they feed on fungi, rotten wood, and other 

 vegetable matter ; but many are parasitic in the larvae or in the 

 nests of other insects. In the perfect state they are mostly vege- 

 table-feeders. Meloidse are wingless, with the edges of the 

 elytra overlapping ; their larvae in the earliest stages are found 

 in the spring on bees and flies, and, being mistaken for lice, 

 were named by Kirby Pediculus mellttcB. Stylopidaa is the most 

 aberrant family of the Coleoptera ; the male only is winged, and 

 ceases to be a parasite only when adult ; their victims are almost 

 exclusively bees. 



Cantharis Lytta 



(Spanish fly). 

 Palaestra. 

 Mylabris. 

 Horia. 



