SYNOPSIS OF CERAMBYCOID LAEV^. 155 



Subdivision B. 



Each mandible with a rather prominent groove or sulcus extending longitudinally on 



anterior third TJlochxtes. 



Mandibles without prominent groove on anterior third Leptura nitens. 



Family Prionid^. 



Sternum and sternellum of prothorax divided by a well defined, ciu"ved suture. 



Division I. 

 Sternum and sternellum of prothorax not divided by a well defined, curved suture. 



Division II. 

 DIVISION I. 



Presternum and sternum of prothorax not divided Tragosoma. 



Presternum and sternum of prothorax divided Subdivision A. 



Subdivision A. 



Scutellum of meso thorax short, dorsal. Presternum of prothorax in form of an equi- 

 lateral triangle Prionus. 



Scutellum of mesothorax not showing. Presternum of prothorax small, transverse. 



Ergates. 



DIVISION II. 



Epistoma bearing four more or less well-defined teeth or tubercles. Presternum of 



prothorax not differentiated Orthosoma. 



Epistoma without teeth or tubercles. Presternum small, triangular Mallodon. 



Family Asemid^. 



Labrum longer than broad Division I. 



Asemum. 

 Labrum broader than long Division II, 



DIVISION II. 



Ninth abdominal segment bearing two small, narrowly separated, chitinized points 

 on dorsal aspect Tetropium. 



Ninth abdominal segment bearing two chitinized points on dorsal aspect, widely 

 separated, and curved toward each other in the form of hooks Atimia. 



The foregoing classification is based entirely upon the characters 

 of the larvae, irrespective of adult characters. Thus the genus Atimia 

 falls in the family Asemidae instead of in the Cerambycidse proper, 

 where it has been placed in the classification of the adults. 



The writer reahzes fully the imperfections and deficiencies of this 

 work. And it is only with the hope that it may prove the basis of 

 a more complete and perfect classification of cerambycoid larvae that 

 he now offers it for publication. 



ADDITIONAL COPIES of this publication 

 -ii- may be procured from the Superintend- 

 ent OF Documents, Government Printing 

 Office, Washington, D. C, at 5 cents per copy. 



