430 CLAVICORNIA — NITIDULIDAE. 



I, Apex of mandibles two-toothed. 



Labrum bilobed ; labial palpi not thickened ; antennae 

 with first joint very strongly dilated, club round ; first 

 three tarsal joints slightly dilated; thorax and elytra 

 broadly bordered, abdomen covered. Am;photis, Er. 



II, Apex of mandibles simple. 



Labrum slightly emarginate in front; labial palpi not 

 thickened ; antennae with first joint thickened, club 

 roundish ; anterior tarsi moderately, hinder pairs slightly 

 dilated ; thorax and elytra not bordered, latter not com- 

 pletely covering abdomen. mo sit a, Er. 

 B, Prosternum produced behind. 



a. First three tarsal joints dilated. 

 J. Anterior tibiae not toothed. 



1. Hinder pairs of tibiae with spines. 



Grooves for reception of antennae scarcely indicated. 

 Labrum sharply excised in middle; last joint of labial 

 palpi oval ; club of antennae round. Thalycra, Er. 



2. Hinder pairs of tibiae without spines. 

 Grooves for reception of antennae indistinct. Labrum 



bilobed ; last joint of labial palpi oval, with apex truncate; 

 club of antennae with four joints in male and three in 

 female. I'ria, Kirby. 



II, Anterior tibiae with many teeth. 



Grooves for reception of antennae deep, straight and 

 parallel. Labrum bilobed ; last joint of labial palpi cylin- 

 drical, with truncate apex. Antennae short, with compact 

 round club ; hinder pairs of tibiae fringed with l)ristles. 



Mcligcthcs, Kirby. 



J), First three tarsal joints not dilated. 



Grooves for reception of antennae deep and curved; 

 labrum emarginate ; elytra covering abdomen, except ex- 

 treme apex ; tibiae simple ; first four tarsal joints tolerably 

 equal in size. Pocadius, Er. 



Mpuraea, 



A. Posterior legs placed near each other. 



a. Thorax with distinct separate and slightly raised side 

 border. 



