NORTH AMERICAN COLEOPTERA. \'l') 



yi. Hiqiintoriali!« Motscluilsky Bull. Mosc. 41, p. 1S2. 1868. — L. e. .7J nun. 

 — Sub-ovate, very connex, and very shining, translucent yellow, very sparingly 

 clothed with short golden hair; head large and broad; ej'es very small ; thorax 

 large, much wider and longer than the head, widest at the base, closely ornamented 

 with minute tubercles in transverse wavy rows; sides rounded and broadly mar- 

 gined, basal margin strongly arcuate with the angles, very acute, and excessively 

 produced, extending to one-quarter of the elytra ; elytra rather long and narrower, 

 much attenuated towards the apex, narrower and rather longer than the head and 

 thorax, rather closely and deeply asperate in transverse oblique rows; sides rather 

 Contracted towards the middle, apex scarcely rounded ; abdomen elongate, robust, 

 bright yellow. 



Central Aiuerica (Motsehulsky ). 



TRICHOPTERYX. 



Kirby and Spence Int. to Enl. 3, p. 40, 1S19. 



Body generally oblong, or ovate. 



Antennae 11-jointed. the three last incrassate, forming a moniliform 



club. 

 Head large, rather deflexed. 

 Pronotum generally dilated towards the base, with the hinder angles 



often much produced. 

 Elytra truncate, generally short. 

 Abdomen moderate, 3 to 5 segments exposed, generally dentate at the 



apex. 

 Mesosternum carinated, carina acute at both extremities. 

 Metasternum moderate, extending to the sides of the body. 

 Venter 6 segments, apical segment often incised near the extremity. 

 Legs moderate, anterior and intermediate tarsi often have basal joints 



dilated. 

 Posterior coXi*; rather distant, with the exterior edge broadly laminate. 



Synoptic Table of Species. 



Thorax evidently wider, or much wider than the elytra. 

 'Thorax smooth, nearly impunctate. 



Elytra strongly attenuated Sc*hHiilllii. 



Elytra not attenuated glabricollis. 



Thora.x evidently tuberculate. 



Head and thorax black, elytra castaneous. 



Form elongate posteriorly, thorax much dilated. 



Size large, abdomen black flaldeiiiuiiiii. 



Form short and broad. 



Elytra con vex Doliriiii. 



Elytra depressed <iiN<>olor. 



Form oblong, thorax widest near the middle siiiiilior. 



(?.2) 



