604 FAMILY XXV. IJISTriRlDJE. 



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. 



(i. Subhumeral stria entire; elytra with four dorsal strife, the fourth some- 

 times abbreviated at base. 

 1>. Outer thoracic stria entire. 



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

 cc. Surface smooth. 



<l. Apical tooth of front tibia.' more prominent than the second; 

 length 5-5.5 mm. 1145. MERDARIUS. 



(1<1. Apical tooth much less prominent than the second. 

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



/. Size larger. 5-7 mm. 114C. IXTERRUPTUS. 



ff. Size smaller, not over 3 mm. 1147. STYGICTS. 



cc. Sulural stria very short, apical ; length 5 mm. 



1140a. var. IM MUNIS. 



lib. Outer thoracic stria much abbreviated or entirely absent. 

 </. Outer stria entirely obliterated; prosternal lobe margined. 



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



1148. MARGINICOLI.IS. 



hli. Thoracic margin not thickened; inner stria abbreviated behind: 

 length 2.5-3.5 mm. COGNATUS. 



////. 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. 1140. FOJ:DATUS. 



ua. Subhumeral stria interrupted at middle, or often entirely obsolete. 

 /. Front tibi;e serrulate with several spinules or small sharp teeth. 

 j. Both outer and inner subhumeral stria- present, the latter apical, 

 deeply impressed; elytra with four entire dorsal stride; length 

 3.5 mm. 1150. ABBREVIATUS. 



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

 three dorsal strife ; length 4 mm. 1151. CIVILIS. 



//. Front tibia' tridentate, the teeth being processes of the tibire itself, 

 /r. Thorax with but one marginal stria. 

 /. Elytra with three dorsal stri:e. 



ni. Kpipleura with one stria; front tibia' 4-dentate; length 5 mm. 



SEMISCULPTUS. 



//////. Kpipleura with two stria-: front tibhe 3-dentate ; length 3- 



4 mm. nispAR. 



//. Elytra with four entire dorsal stria 1 ; epi pleura unistriate; length 



5.5 mm. 1152. oscrr.ATUS. 



A7,'. Thorax with two stria 1 . 



//. Elytra with three entire stria 1 . 



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

 pleura with two stria-; length 5.5 mm. 1153. DEPURATOR. 



