THE GBOUXD BEETLES. 



97 



134 (571). Ptebostichus cobvinus Dej.. Spec. Ill, 1827, 281. 

 Elongate, more robust. Black, antennae and tarsi piceous. Thorax 



rather short, sides rounded, not sinuate, hind angles very slightly promi- 

 nent or subobtuse; basal impressions very deep, sparsely and coarsely 

 punctured. Elytral striae deep, not or very finely punctured. Length 

 13.5-15 mm. 



Frequent about the margins of lakes in the northern half of 

 the State; not yet taken in the southern half. May 5-October 29. 



135 (572). Ptebostichus haldemaxi Lee. Ann. Lyc. Nat. Hist.. IV, 1848, 



341. 



Oblong, very robust, subdepressed. Black, elytra not shining; an- 

 tennae and tarsi piceous. Thorax a little broader than long, narrowed be- 

 hind, sides scarcely sinuate, basal impressions not punctured. Elytral 

 striae narrow, deep, not punctured ; intervals convex. Length 22-24 mm. 



A southern form, rare in Indiana. Two specimens from mar- 

 gins of cypress swamp. Knox County. April 23-May 25. This 

 species and the next two were formerly classed under the genus 

 Lophoglossus Lee. distinguished by the ligula being obtusely cari- 

 nate for its whole length. They also have the thorax strongly re- 

 flexed, gradually wider behind, the front transverse line deep, dis- 

 tant from margin, the hind angles obtuse ; dorsal punctures three. 



136 (573). Ptebostichus taktaeicus Say, Trans. Ainer. Phil. Soc, II. 



1823, 44 ; ibid. II, 469. 

 Oblong, depressed. Black, shining, antennae, tibiae and tarsi piceous. 

 Thorax with sides distinctly sinuate towards the base. Elytral striae finely 

 and indistinctly punctate, intervals subcouvex. Male with subapical tooth 

 on inner surface of middle tibiae short, obtuse; the apical process large, 

 acute. Length 16-20 mm. 



Throughout the western half of the State, common; especially 

 so in sandy localities near water. Hibernates. April 17-Decem- 

 ber 28. 



137 (574). Ptebostichus scrutator Lee. Ann. Lyc. Nat. Hist.. IV, 1848, 



342. 



Oblong, depressed. Black, very shining; legs and antennae piceous. 

 Hind angles of thorax less prominent than in tartaricus and elytral striae 

 differing as mentioned in key. Male with subapical tooth of middle tibiae 

 long and sharp; the apical process not distinct. Length 15-16 mm. 



Cass County; rare. September 15, Two specimens taken by 

 Dr. Robert Hessler from a ditch dug about a burning peat bog near 

 Royal Center. 



