BRACHYPTERIDES. 427 



a. Maxillae with two lobes. 



No grooves for reception of antennae. Brachyiitcrides. 



b. Maxillae with one lobe. Carpo2)hilides. 

 -B. Elytra leaving at most the last abdominal segment free. 



«. Maxillae with one lobe. 

 jT. Labium distinctly visible. 



1, Base of elytra not covered by thorax. 



First three tarsal joints sometimes dilated, only fourth 

 small. Nitidulidcs. 



2, Base of elytra covered by thorax. 



First three tarsal joints dilated, only fourth small. 



Gychr amides, 

 II, Labrum hidden. 



First three tarsal joint sometimes dilated, only fourth 

 small. Ipides. 



b. Maxillae with two lobes. 



Labrum distinct. First tarsal joint small, second and 

 third laterally produced, fourth very small ; claws toothed. 



Byturides. 



BRA CHYPTERinES, 



A, Tarsal claws not toothed. 



Last joint of laltial palpi ovate ; inner maxillary lobe witli 

 a tuft of hairs at apex. Male with no extra anal abdominal 

 segment. " Cercus, Latr. 



a. Tarsal claws toothed. 



Last joint of labial palpi globular ; inner maxillary lobe 

 without hairs at apex. Male with an extra anal abdominal 

 segment. Br achy icterus, Kug. 



Cercus, 



A, Sides of thorax strongly rounded, posterior angles 

 rounded off. 



a. Elytra reddish-yellow, generally darker at suture. 



Head and thorax reddish-yellow ; breast blackish. An- 

 tennae more than half as long as body in both sexes, first 

 two joints dilated in male ; thorax double as broad as long, 



