88 THE CANADIAN ENTOMOLOGIST. 



40. First joint of hind tarsi with the usual brush of hair beneath (except 



in certain Acmceops). Prothorax, with rare exceptions, distinctly 

 tuberculate at sides or with heavy lateral spine. Head obliquely 



narrowed behind eyes 41. 



First joint of hind tarsi without brush-like sole. Prothorax, with few 

 exceptions, broadest at base, sides never spined and rarely tuber- 

 culate. Head suddenly constricted behind the eyes 46. 



41. Antennae short, joints 5 to 1 1 wider. Prothorax with a heavy spine 



at sides, elytra strongly costate Rhaghim. 



Antennae long or moderate, not chickened, elytra never strongly 

 costate 42. 



42. Eyes large or moderate. Thorax (except in Pachyta inoiiticola) with 



sharp, strong, lateral spine 43. 



Eyes small, not emarginate, prothorax angulate or rounded on sides.. 45. 



43. Eyes coarsely granulated, very prominent ; form of body 



parallel Centrodera. 



Eyes finely granulated ; body narrowed behind 44. 



44. Eyes feebly emarginate Pachyta. 



Eyes more strongly emarginate AiithopJiilax. 



45. Mesosternum not protuberant, body above more or less pubescent, 



sometimes moderately shining Aanceops. 



Mesosternum protuberant, body above brilliant metallic 



green Ganrotes. 



46. Head constricted far behind the eyes, neck consequently very short. 



Form extremely slender, hardly tapering behind, prothorax with 



lateral tubercle Ency clops. 



Head constricted close behind the eyes. Form variable, usually 

 much narrowed behind, prothorax rarely bulging at sides and never 

 with distinct tubercle 47. 



47. Last ventral of male deeply excavated 48. 



Last ventral of male not excavated 49. 



48. Antennae without poriferous spaces, size large, sides of elytra deeply 



sinuate Bellamira. 



Antennae with impressed poriferous spaces on sixth and following 

 joints. Size moderate, sides of elytra sinuate, form 

 very slender Strangalia. 



49. Antennae with poriferous spaces Typocerus. 



Antennae without poriferous spaces Leptura. 



