0.70 . THE CANADIAN ENTOMOLOGIST. 



clypeus with a median ridge or carina; thorax ratlier coarsely closely 

 punctate, the mesopleura striate and punctate ; metathorax at 

 sides, as well as its posterior fiice, striate or aciculate, sometimes 

 very coarsely, the metanotal area with oblique striae; abdomen fine- 

 ly but distinctly, minutely punctate . . Protothyreopus, Ashm., n. g. 



[Type C. rufifemur, Pack.] 

 9. Clypeus medially strongly quadrately produced, with a tooth on each 

 side between the median production and the eyes ; thorax rather 

 coarsely punctured or sculptured, shining or at most subopaque ; 

 metanotum coarsely reticulate, subopaque, the metapleura and 

 posterior face densely striate ; abdomen shining, the basal segment 

 very distinctly punctate, the following segments less densely, more 

 minutely or microscopically punctate ; mandibles truncate, indis- 

 tinctly bidentate at apex ; anterior tarsi with fine short bristles 

 beneath, the first joint slender, much longer than 2-5 united ; face 

 except scrobes and the clypeus clothed with a silvery pubes- 

 cence Ceratocolus, Lepel. et Br. 



[Type C. alatus, Panz.] 

 ID. Mandibles with a tooth within towards base; ocelli, unless other- 

 wise mentioned, arranged in an obtuse triangle . * . , the lateral 

 ocelli being very much farther from each other than to the front 



ocellus II. 



Mandibles without a tooth within towards base ; ocelli arranged in a 

 triangle . ' , ; superorbital foveas wanting ; clypeus produced medi- 

 ally ; first flagellar joint elongate, beneath excised so as to appear 



bidentate Clytochrysus, Morawitz, 



[Type sexcinctus, H. Schf.] 



II. Superorbital foveae wanting or at most not sharply defined, indicated 



only by a slight glabrous depression or streak in the sculpture 



close to the eye margin 14. 



Superorbital foveas always distinct, sharply defined, elongate or 



linear 12. 



I 2. Front femora unarmed beneath at base 13. 



Front femora armed with a tooth, angulation or sharp ridge be- 

 neath at base. 



Front tarsi simple, not dilated ; middle tibial spur rarely dis- 

 tinct ; flagellar joints simple, not emarginate beneath ; thorax 

 coarsely conflueutly punctate ; abdomen strongly or distinctly 



