THE CANADIAN ENTOMOLOGIST. 



251 



Of the above, rubriventris is considered a variety of dubius, and 

 nubihts, in a like manner, of tindatulus. Some allowance must be made 

 for colour variation, but, as a rule, specimens may be easily assigned to 

 their proper places by the table. 



Thaneroclerus, Spin. 

 T. sanguineus., Say, is easily recognized among the Canadian species 

 of this family by its colour, the head and thorax being obscure brownish, 

 while the elytra are sanguineous. Length about .20 in. 



HvDNOCERA, Nevvm. 

 Smaller and more slender insects than most of the other Cleridaj, 

 found commonly on foliage, and easily obtained by beating or sweeping. 

 The eyes are very large and prominent, as in Cicinde/a and Stenus, to 

 which latter genus a few of them bear, at first sight, considerable resem- 

 blance. Some species have the elytra much shorter than the abdomen. 

 Ordinarily well-marked specimens may be identified by the following 

 table :— 

 A. Thorax not or only slightly longer than broad, 

 b. Punctuation of elytra confused. 



Thorax with subacute lateral dilatation ; elytra blackish with a 



narrow yellowish median fascia. .17 in.. .tmi/asciata,?)a.y. 



Thorax hardly acutely dilated at sides; elytra with the humerus 



usually broadly rufous, varying to entirely black ; legs black 



or rufous. . 17-. 20 in humeralis. Say. 



Thorax with rounded lateral dilatation and profound anterior 

 impression; anterior legs testaceous. .20 



in var. cyatiescens, Lee. 



bb. Punctuation of elytra distinct, the individual punctures evident. 

 Blackish-blue, polished, elytra without testaceous markings, 

 legs black, tibise and tarsi sometimes more or less testaceous. 



. I o in var. difficilis, Lee. 



Black, antennae and feet pale, elytra pale with the margin, 

 apex, suture and median fascia black (these markings vari- 

 ously reduced). .17 in. (fig. 19) pallipennis, Say. 



AA. Thorax distinctly longer than broad, elytra shorter 



than the abdomen, legs much elongate. Blackish 



species, base of elytra sometimes testaceous. 



Thorax twice as long as broad, elytra slightly shorter than the 



abdomen. .19-. 25 in tabida, Lee. 



Fig. 19 



