134 



ARTHROPODA. 



Lema. 



Hsemonia. 



Donacia. 



Bhaebus. 



Orsodacna. 



Ametalla. 



Sagra. 



Diaphanops. 



Carpophagus. 



Polyoptilus. 



Megamerus. 



LONGICORNIA. Antennae long, filiform. Body oblong or elon- 

 gate. Female with an ovipositor. 



The larvae are mostly wood-feeders ; the perfect insects live but 

 a short time, and feed on vegetable substances ; none are known 

 to be aquatic. A few species have the aiitenns& in the male either 

 pectinate, flabellate, or serrated ; the under surface of the joints 

 in many species have one, two, or more pores. Lamiidse may be 

 almost always recognized by their vertical head ; Cerambycidae 

 have the head porrect ; and the Prionida& have the sides of the 

 prothorax sharply delimited from the upper portion (pronotum), 

 and frequently toothed or spined. Tmesisternus and its allies are 

 intermediate forms. Erichsonia and Parandra differ from all 

 other longioorns, except Anoploderma, in having the third tarsal 

 joint entire, not bilobed. There are above 8000 described species 

 in this group. 



