214 THE CANADIAN ENTOMOLOGIST. 



Superorbital foveas wanting, never sharply defined, at the most 

 represented by sh'ght glabrous depressions ; middle tibiae with 

 an apical spur. 



Metathorax coarsely irregularly rugose, with a deep furrow 

 on the posterior face, the latter also usually transversely 

 wrinkled ; mesonotum finely coriaceous, opaque, very 

 sparsely punctate ; anterior and middle tibiae with a sparse 



flocculus beneath Anothyreus, Dahlbom. 



[Type A. lapponicus, Dahlb.] 



Metathorax coarsely reticulate ; pronotum with acute lateral 

 angles anteriorly ; mesonotum closely punctate, opaque, 

 not aciculaie ; mesopleura with a conical tubercle before 

 the middle coxfe; trochanters and femora beneath clothed 

 with a rather long, thick, white fioc- 



culus Paranothyreus, Kohl. 



[Type C. hilaris, Smith.] 



5. Superorbital fove;e sharply defined, distinct, oblique, usually dull or 



opaque at bottom ; metathorax rugose, opaque, with a deep median 

 sulcus on posterior face ; mesonotum closely punctate, opaque, 

 often longitudinally aciculate or striate. 



Antennae with the flagellum not fusiform, hardly compressed, the 

 joints not or scarcely wider than long, the first two always 

 longer than wide ; clypeus anteriorly quadrately produced ; 

 anterior tarsi not especially broad, without an 



appendage Synothyreopus, Ashm., n. g. 



[l^pe C. tumidus, Pack.] 



Antennae with the flagellum fusiform, compressed, the joints much 



widened, the first three or four joints fully twice as wide, or 



wider, than long ; clypeus anteriorly, not quadrately produced 



at the most semicircularly produced ; anterior tarsi broad, 



dilatedf with an appendage Thyreopus, Lep., et. Br. 



[Type C. cribarius, Fabr.] 



6. The recurrent nervure in front wings received by the cubital cell at or 



near the middle, or only slightly beyond the middle ; abdomen 

 usually muuacu'ate. without yellow marks ; mandibles at apex 

 bidentate or tridentate ; eyes strongly convergent below, the 

 antennal sockets in consequence being very close to the eye 

 margin 7. 



