THE GROUND BEETLES. 



57 



dd. Striae not extending to base of elytra ; tip of elytra rufous. 



g. Elytra! striae strongly punctate; thorax ovate, broader than 



loilg. 54. IIJEMOERHOIDALIS. 



gg. Elytral striae feebly punctate; thorax quadrate-globose. 



55. TERMINATUS. 



hh. Third interval of elytra with two punctures or none at all. 



h. Apical spur of front tibiae very short ; elytral striae coarsely punc- 

 tured, absent on apical third ; thorax longer than wide. 



BEEVISPINUS. 



lift. Apical spur of front tibiae long. 



i. Elytral striae deep, entire ; clypeus bisinuate and with three 

 teeth. 56. sphjericollis. 



it. Elytral striae partly abbreviated at base ; clypeus truncate. 

 j. Thorax ovate, broader than long. trtjncatus. 

 jj. Thorax oval, not wider than long. 57. erythrocerus. 



off. Elytra with third, fifth and seventh intervals each furnished with sin- 

 gle rows of setae-bearing punctures ; thorax globose ; elytral striae 

 coarsely punctured. 5S. hispious. 



51 (225). Dyschirius nigripes Lee, Trans. Amer. Phil. Spa, X, 1S53, 390. 



Elongate, slender. Black, strongly shining; antennae piceous, the 

 basal joint, tibiae and tarsi, dark reddish-brown. Clypeus bidentate. Thorax- 

 globose with a very fine, median impressed line. Elytral striae fine, dis- 

 tinctly punctured only on basal half. Length 3-3.2 mm. 



Lake County ; rare. May 5. A member of the boreal fauna, 



52 (232). Dyschirius globulosus Say, Trans. Amer. 



Phil. Soc, II, 1823, 23 ; ibid. II, 452. 



Black or dark reddish-brown, strongly shining ; legs 

 and antennae rufous. Thorax ovate, broader than long, 

 disk with a median impressed line. Elytral striae ex- 

 tending to base, distinct, coarsely punctate; wholly ab- 

 sent on apical third. Length 2.7-3 mm. (Fig. 43.) 



Throughout the State, frequent; much more so 

 northward. March 5-August 24. Often taken 

 from beneath the loose bark of logs in low ground 



° ° Fie. 43. (Original.) 



WOOds. X 13. 



53 (231). Dyschirius longulus Lee, Agass. Lake Sup., 1850, 204. 



Allied to the preceding but a little smaller and having the antennae 

 fuscous at apex. Thorax subglobose (the length equal to the breadth) and 

 not narrowed in front. Elytra more elongate, with deeper striae, the punc- 

 tures of which are absent on apical half. Length 2.5-2.7 mm. 



Throughout the State ; frequent. March 17-October 1. 



D. ceneolus Lee, black, shining, and 3.8 mm. in length, is also -a 

 member of the boreal fauna and very likely occurs in the northern 

 third of the State. 



