202 THE CANADIAN ENTOMOLOGIST. 



material for the table, which is in the main only a slight rearrangement 

 of the numerous short ones of their own. 



Humeral angles not prominent, wings wanting. Form very con- 

 vex, prothorax rounded, unarmed. Elytra with bands of pubes- 

 cence Ipochus. 



Humeral angles usually distinct, wings and elytra fully developed, not 

 abbreviated 2. 



2. Usually large or moderate-sized species; elytra not spinose at base.. 4. 

 Small or minute species. Elytra with a spine or gibbosity near the 



scutellum 3. 



3. Humeri rounded, elytra very convex and with large spine near 



scutellum Crytinus. 



Humeri distinct, elytra less convex, with oval gibbosity near scutel- 

 lum Psenocerus. 



4. Scape of antennae with apical cicatrix. Nearly all large species, 



antennae sometimes greatly elongate in the males. Prothorax with 



lateral spine present, often very large 5. 



Scape of antennae without apical cicatrix 6. 



5. Legs long, anterior pair elongate in the males Mo7iohamnms. 



Legs equal, not elongate Goes. 



6. Front coxal cavities rounded. Body usually broad. Elytra attenuate 



behind. Antennae usually very long in the males 7. 



Front coxal cavities angulate 14. 



7. Scape of antennae club-shaped. Prothorax with dorsal tubercles and 



large, acute, nearly median lateral spine Acanthoderes. 



Scape of antennas nearly cylindrical. Lateral spine or tubercle, if 

 present, behind the middle 8. 



8. Female without elongated ovipositor 9. 



Female with elongated ovipositor 12. 



9. Prothorax fully tuberculate or angulate. Mesosternum 



broad , Leptostylus. 



Prothorax distinctly angulate, or more frequently with a short spine 



or acute tubercle behind the middle. Mesosternum narrow ... 10. 



10. Antennae without traces of cilife beneath, first joint of hind tarsus as 



long as the next two. Prosternum narrow, body without erect 



hairs Liopus. 



Antennas distinctly ciliate beneath, first joint of hind tarsi as long as 

 next three ...,,.....,...,...,. ,,..,.. .\\, 



