THE SHORT-WINGED SCAVEXGEE BEETLES. 465 



B. idtidicoUis Lee, 3 mm. in length, is recorded from New York, 

 IMiihigan and Missouri. 



Group C. 



Small or medium sized forms having the side margin of thorax 

 acute ; prosternal sutures straight ; mandibles with two acute teeth 

 on the inner side ; fissure of front eoxal cavities open and large. 



KEY TO IXDIANA SPECIES OF GSOUP C. 



a. Head and. thorax finely granulate, the (rornier flattened. 



6. Size larger, 6-6.5 mm. ; median fovea of head very large ; elytra red- 

 dish-brown, fuscous near scutellum. 896. boeealis. 

 66. Size smaller, not over 4 mm. 



c. Head not punctate ; elytra piceous ; length 3.5 mm. 



897. STABILIS. 



cr. Head punctate; elytra reddish-brown. 



<L Thorax with hind angles distinct, its disk less densely granu- 

 late; tip of abdomen darker than base. 8'.)S. AKNUiji.Ris. 

 (Id. Thorax with hind angles indistinct, rounded, its disk vei-y dense- 

 ly granulate; abdomen black throughout. 890. cokfusus. 

 <i(i. Head and thorax polished, the former convex, tlie latter \^ithout hind 

 angles ; piceous, elytra dull yellow, the suture fuscous. 



900. EMAKGINATUS. 



896 ( ). Bledius borealis sp. nov. 



Eli.ngate, robust, subdepressed. Black, shin- 

 ing; legs and elj^tra chestnut brown, the latter 

 fuscous at middle of base and for a short dis- 

 tance along the suture ; antenn;e dusky tfiward 

 apex, slender. Plead much narrower than tho- 

 rax, very finely granulate, coarsely and sparsely 

 ])unctato, the median fovea large and deep, the 

 suture distinct. Thorax at apex slightly wider 

 than long, sides straight and parallel for two- 

 thirds their length, thence rapidly converging to 

 base, the latter one-half as wide as apex ; disk 

 convex, finely and densely granulate, coarsely 

 and sparsely punctate, smooth along the middle 

 and on apical third, median line fine; hind an- 

 gles small but distinct. Elytra scarcely wider 

 and but slightly longer than thorax, finely anil ^ig. 167. (Original.) 



rather sparsely punftate. Abdomen above and beneath finely granulate, 

 very sparsely and finely punctate. Length 6-0.5 mm. (Fig. 167.) 



Lake County; rare. ]\ray lf)-^[ay 28. Three specimens from 

 near Pine, Ijeneath clumps of cactus. 



897 (9096). BLEDirs stabilis Casey. Ann. X. Y. Acad. Sci., T, 1889, 61, 

 Elongate, rather robust, deiiressed. Blark ; thorax and elytra piceous; 



legs and antenna' toward base, dull .yellow. Head distinctly narrower than 



