60 



ZOOLOGY 



Antennae straight, or, if bent, not ter- 

 minating in lamellate club. 

 di. Maxillary palp as long as or longer 



than antennae . HydrophilidoB 



( Water-scavengers ) 

 dz- Maxillary palp clearly shorter than 



antennae. 



d. Six to seven ventral segments, 

 or if only five, the first 3 or 4 

 are grown together, 

 /i. Anterior coxse spherical or 

 transverse, projecting 

 little from the coxal 

 cavity. 



<7i. All legs used in run- 

 ning or walking . Carabidce 



(Eunners) 



g. 2 . At least the hinder 

 legs used for swim- 

 ming 



/ 2 . Anterior coxse conical or 

 tooth-like, projecting 

 prominently from coxal 

 cavities. 



gi. Anterior coxse coni- 

 cal ; abdomen com- 

 posed of six rings . 



~] DytiscidoB 



(Divers) 



i Gyrinidw 



} (Whirligigs) 



Silphidas 



(Carrion-beetles) 



ffz- 



Anterior coxas ap- 

 proximately cylin- 

 drical ; c u t i c u 1 a 

 soft, leathery 



Abdomen composed of five rings. 



/i. Anterior coxas spherical ; 



prothorax with a pro- 



cess resting in a depres- 



sion of the mesothorax. 



gi. Not capable of leaping 



into the air 



Lampyridce 



(Fireflies) 



Buprestidce 



(Metallic Wood-borers) 



