THE CANADIAN ENTOMOLOGIST. 213 



indicated by a large oblique depression on the surface 3. 



Superorbital fovese always wanting, never sharply defined, at most 

 indicated only by a scarcely perceptible depression between the 

 lateral ocelli and the eyes. 



Third antennal joint longer than the fourth ; metanotum with 

 the semicircular area very coarsely, irregularly reticulate or 

 rugose, the posterior face reticulate or transversely wrinkled, 

 with a deep median sulcus; recurrent nervure uniting with 

 the cubitus at or a little before the apical third of the 

 cubital cell ; abdomen alutaceous or coriaceous, impunctate, 



the first segment highly polished Anothyreus, Dahlb. 



[Type A. lapponicus, Dahlb.] 

 Third antennal joint shorter than the fourth ; metathorax 

 coarsely irregularly reticulate, the posterior face smoother, 

 not transversely wrinkled ; mandibles at apex truncate or 

 bluntly rounded, with a small tooth within before apex ; 

 clypeus anteriorly quadrately produced medially, with acute 



lateral angles Paranothyreus, Kohl. 



[Type C. hilaris. Smith.] 

 Mandibles at apex bidentate, the inner tooth the larger, bluntly 

 rounded; thorax closely punctate, opaque, and often with longi- 

 tudinal aciculations ; metathorax punctate, with a median longi- 

 tudinal sulcus posteriorly, the triangular area at base rather small 

 reticulate or alveolate. 



Clypeus anteriorly broadly quadrately produced ; recurrent 

 nervure in front wings received by the cubital cell much 



before its apical third Synothyreopus, Ashm., n. g. 



[Type C. tumidus, Pack.] 



Clypeus anteriorly, not quadrately produced, rounded, or at most 



semicircularly produced ; recurrent nervure in front wings 



received by the cubital cell at or beyond .the apical third, 



rarely before Thyreopus, Latreille. 



[Type C. cribrarius, Fabr.] 



Anterior legs abnormally developed, the trochanters, the femora or 



tibi?e, or altogether broadened, most frequently with a shieldlike 



expansion on the tibiae 5_ 



Anterior legs normally developed, the tibiae without a shieldlike 

 expansion, 



