1873 ] — '''-> [Horn. 



H. sedecimstriatus, Say. Journ. Acad., 1825, p. 36 : Lee. Bost. 

 Journ. V., p. 57, pi. 3, fig. 9 ; Mars. Mon., 1854, p. 285, pi. 8, fig. 84. 



Thorax with the internal lateral stria entire. Elytra with five entire 

 striae, deeply impressed, the fifth arching at base, and joining the sutural, 

 two subhumeral stria3, outer entire, inner more deeply impressed termi- 

 nating at humerus, but continued by the fine oblique humeral. Epi- 

 pleurae bistriate. Propygidium coarsely and sparsely punctured, 

 pygidium nearly smooth, very minutely punctulate. Anterior tibiae 

 finely tridentate, apical tooth finely bifid. Length .16 inch ; 4 mm. 



Middle States and Canada. Abundant. 



H. anibigena, Lee. Proc. Acad., 1859, p. 313. 



Inner thoracic stria entire, outer abbreviated, extending nearly to the 

 middle of thorax. Elytra with live entire strife, fifth arching and join- 

 ing the sutural, two subhumeral striae, finely impressed, equal in length, 

 and extending slightly in front of middle. Anterior tibia? finely Eden- 

 tate, apical tooth bifid. Propygidium and pygidium very sparsely and 

 not coarsely punctured, the latter smoother at apex. Length .14 inch: 

 3.5 mm. 



One specimen, Vermont. 



H. americanus, Payk. Mon. p. 31, pi. 9, fig. 1 ; Lee. Bost. Journ. 

 V., p. 5G, pi. 3, fig. 7 ; Mars. Mon., 1854, p. 575, pi. 10. fig. 138. 



Thorax with inner stria entire, outer abbreviated, rarely more than an 

 arc at the anterior angle. Elytra with three entire striae, fourth very 

 slightly abbreviated, fifth curved at base and very rarely joining the 

 sutural, striae finely impressed. Upper surface smooth. Epipleurae 

 bistriate. Propygidium coarsely but sparsely punctured, pygidium more 

 finely punctured and nearly smooth at apex. Anterior tibiae tridentate. 

 apical tooth prominent, and finely bifid at tip. Length . 12-. 16 inch ; 

 3-1 mm. 



Occurs abundantly 7 from Canada to Georgia and Kansas. 



H. perplexus, Lee. New Species, 1863, p. 61. 



Closely allied to the preceding species, and differing in the following 

 slight characters : Surface sparsely and finely punctured. Elytra with 

 three entire striae, fourth very slightly shorter, fifth equal to the fourth, 

 and joining the sutural. Striae rather strongly- impressed and punctured. 

 Length .16 inch ; 4 mm. 



As the specimens of this species are better developed than the prece- 

 ding, it seems probable that they T are mere local varieties. 



Occurs in Canada, Middle States, Illinois and Wisconsin. 



H. exaratus, Lee. Bost. Journ. V., p. 59, pi. 3, fig. 12. 



Closely allied to perplexus, but differs as follows: Thorax with the 

 inner stria only. Elytra with striae finer. Surface not punctured. 

 Length .14 inch ; 3-5 mm. 



One specimen, Georgia. 



