604 



FAMILY X XV. — TJ "ISTERI DIE . 



Group B. 



All the members of this group have the mesosternum distinctly 

 emarginate in front and the thorax without cilia? on the front and 

 side margins. The following species have been taken or may occur 

 in the State. 



KEY TO SPECIES OF GROUP B. 



a. Subkumeral stria entire ; elytra with four dorsal stria?, the fourth some- 

 times abbreviated at base. 

 b. Outer thoracic stria entire. 



c. Surface above sparsely but distinctly punctured. 1144. harrisii. 

 co. Surface smooth. 



d. Apical tooth of front tibiae more prominent than the second; 

 length 5-5.5 mm. 1145. merdarius. 



dd. Apical tooth much less prominent than the second, 

 e. Sutural stria long, extending in front of middle. 



/. Size larger, 5-7 mm. 1146. interruptus. 



//. Size smaller, not over 3 mm. 1147. stygicus. 



ee. Sutural stria very short, apical ; length 5 mm. 



1146a. var. immunis. 

 bb. Outer thoracic stria much abbreviated or entirely absent. 

 g. Outer stria entirely obliterated ; prosternal lobe margined. 



h. Thoracic margin thickened ; inner stria entire ; length 4.5 mm. 



1148. MARGINICOLLIS. 



hh. Thoracic margin not thickened; inner stria abbreviated behind; 

 length 2.5-3.5 mm. cognatus. 

 gg. Outer thoracic stria visible, usually forming a short arc near the 

 front angle; inner stria slightly abbreviated at tip; length 3.5- 

 5.5 mm. 1149. fgedatus. 



aa. Subkumeral stria interrupted at middle, or often entirely obsolete. 

 i. Front tibiae serrulate witk several spinules or small sharp teeth. 

 j. Both outer and inner subkumeral striae present, the latter apical, 

 deeply impressed; elytra with four entire dorsal striae; length 

 3.5 mm. 1150. abbrevtatus. 



jj. Subhumerals entirely absent or with only a mere trace ; elytra with 

 three dorsal striae ; length 4 mm. 1151. civilis. 



ii. Front tibiae tridentate, the teeth being processes of the tibiae itself. 

 7c. Thorax with but one marginal stria. 

 7. Elytra with three dorsal striae. 



m. Epi pleura with one stria ; front tibiae 4-dentate ; length 5 mm. 



SEMISCULPTUS. 



mm. Epipleura with two striae; front tibiae 3-dentate; length 3- 

 4 mm. DisPAR. 

 U. Elytra with four entire dorsal striae; epipleura unistriate; length 

 5.5 mm. 1152. osculatus. 



I k. Thorax witk two striae. 



//. Elytra witk three entire striae. 



o. Inner subhumeral present at apex, moderately impressed ; epi- 

 pleura witk two striae; lengtk 5.5 mm. 1153. depurator. 



