THE GROUND BEETLES. 



4.9 



c. Under surface of thorax coarsely and sparsely punctate. 



35. CLAIRVILLEI. 



cc. Under surface of thorax finely and densely punctate ; legs piceous. 



36. LiEVTGATUS. 



J)h. Elytra punctate, at least on sides. 



d. Whole surface of elytra sparsely and coarsely punctate; length 



7-7.5 mm. 37. cicatricosus. 



dd. Raised portions of elytra between the impressions not punctate ; 

 length 8-8.5 mm. 38. fuliginosus. 



aa. Thorax finely, evenly and densely punctate ; front tarsi of male with 

 three joints dilated ; length 6 mm. 39. ruscarius. 



35 (150). Elaphrus CLAiRviLLEi Kirby, Faun. Bor. Amer., IV, 1837. 



Elongate-oblong. Obscurely bronzed, shining; elytra with a purplish 

 tinge ; legs paler. Head sparsely punctate, vertex foveate, occiput deeply 

 impressed. Thorax not wider than head, disk with a deep fovea each side, 

 the base and apex sparsely punctured on the sides. Elytra with four rows 

 of eye-like foveas Length 8.5 mm. 



One in Field Museum collection labelled "Ind." Probably 

 from near South Bend. A member of the boreal fauna. 



36 (151). Eiaphrus l^evigatus Lee, Ann. Lyc. Nat. Hist, V, 1852, 200. 



Bronzed, shining, legs piceous. Elytra not punctured, the fovea 1 

 purplish. Length 7-8 mm. 



Two specimens in Field Museum labelled "Ind." Ranges from 

 Michigan to California. 



37 (153). Elaphrus cicatricosus Lee, Ann. Lyc. Nat. Hist., IV, 1S4S, 348. 



Elongate-oblong. Dull brassy above; bluish beneath; tibise and tarsi 

 dull yellow. Thorax with a deep median impression and a small circular 

 fovea each side; the punctures, as well as those of elytra, much more 

 coarse and irregular in size than in ruscarius. Length 7-7.5 mm. 



Mud flats, border of cypress swamp, Knox County ; frequent lo- 

 cally. June 29-September 2. 



38 (155). Elaphrus fuliginosus Say, Trans. Amer. Phil. Soc., IV, 1834, 



417; ibid. II, 529. 

 Brassy-black, tinged with green above, metallic green below ; tibia? 

 and tarsi reddish-brown. Thorax and sides of elytra sparingly punctate ; 

 disk of latter in part smooth. Length 8-S.5 mm. 



A northern species taken sparingly along the beaeli of Lake 

 Michigan near Fine, Lake County. May 20-June 29. 



39 (160). Elaphrus ruscarius Say, Trans. Amer. Phil. Soc. 



IV, 1834, 417; ibid. II, 496, 530. 

 Dull brassy above ; metallic green beneath ; impressions 

 of elytra purplish ; legs reddish-brown. Thorax coarsely punc- 

 tate beneath, the disk with a faint median impression. Length (After Le m.) 

 6 mm. (Fig. 37.) 



