348 HETEROMERA — PYROCHROTDAE. 



Elytra red : breast and abdomen black. Forehead with 

 a deep crescent-shaped impression ; thorax with a fine cen- 

 tral furrow ; antennae of male sawlike. Common. 



P. serraticornis, Scop. 



&. Thorax yellow-red, with dark disc ; length 3^ lines. 



Elytra yellow-red ; breast and abdomen black. Fore- 

 head uneven ; each elytron with two slightly raised lines ; 

 antennae of male comblike. Eare. P. pectinicornis, Lin. 



MOBDELLinAE. 



A, Pygidium prolonged into a conical process. 



Posterior coxae as long as metasternum; tarsal claws 

 more or less toothed ; eyes entire. 



a, Scutellum large, transversely rectangular. 



Similar to Mordella, but with antennae sawlike from fifth 

 joint, gradually decreasing; intermediate tibiae shorter 

 than the first four joints of their tarsi. 



Tomoxia, Cost. 



6. Scutellum not large, transversely triangular or 

 rounded. 



J. Antennae obtusely sawlike toward apex ; episterna 

 of metathorax elongate triangular. 



Last joint of maxillary palpi hatchet-shaped ; antennae 

 simple or sawlike from fourth or fifth joint ; thorax trans- 

 verse ; penultimate joint of front pairs of tarsi emarginate 

 or hollowed out above. Mordella, Lin. 



II, Antennae almost threadlike ; episterna of meta- 

 thorax elongate linear. 



Similar to Mordella, but with thorax at least as long as 

 broad. Mordellistena, Cost. 



S* Pygidium curvilinear triangular, not prolonged. 



Last joint of maxillary palpi hatchet-shaped, more or less 

 elongate ; eyes generally emarginate ; antennae nearly 

 threadlike or slightly thickened at apex ; tliorax strongly 

 transverse ; fourth joint of anterior tarsi very small, re- 

 ceived in third, which is bilobed. Anaspis, Geoffr. 



