384 FA^rlLT XI. STAPHYLINin.E. 



P vnriam P:iyk., 5-6.5 mm. ; P. dhcoulcus Grav., 4-5.5 mm., and 

 P. thiDiiaruiii Aube, 3 mm. in length, all have a known distribution 

 which should bring them within the limits of the Indiana fauna, 

 but no one of them is represented in the collection at hand. 



Group C. 



In this group the punctures of the dorsal rows of thorax are five 

 in number and the front tarsi of males are rather widely dilated; 

 those of females more narrowly dilated. 



KEY TO INDIANA SPECIES OF GKOIP 0. 



a. Males with the last two ventral segments notched at apex ; color vari- 

 able; surface densely punctate: length 4.5-f>X> mm. alumnus. 

 aa. Males with the last segment only notched. 

 h. Elytra i-ed. 



0. Thorax entirely red, distinctly narmwed in front, much wider than 

 head and as broad as the base of elytra. 737. thobacicus. 



cc. Thorax black. 



d. Thorax distinctly narrowed In front ; body spindle-shaped. 



738. rusiFOKMis. 

 dd. Thorax scarcely narrowed in front; form parallel; legs and base 

 of antennte pale yellow. 739. fulvipes. 



66. Eljrtra black or piceous. 



e. Legs and antennse wholly black ; elytra black ; length 10 mm. 



740. SCHWABZI. 



ee. Legs and base of antennte paler; general color piceous. 

 f. Head oval, distinctly narrowed behind the eyes. 

 g. Elytra and abdomen opaque, very densely and finely punc- 

 tured; antennte rather short and stout; .ioints 5-10 broader 

 than long ; length 4.5-5 mm. 741. micans. 



fni. Elytra more or less shining, neither densely nor finely punc- 

 tate. 

 //. Antennas slender, the joints all longer than wide; length 

 6.5-8 mm. 

 ('. Basal .ioint of antennte pale ; abdomen not coarsely punc- 

 tate. 742. lomatus. 

 a. Antsiinie entirely piceous; elytra more coarsely, abdomen 

 more sparsely, punctate than in lowalva. cunctans. 

 lili. Antenna^ shorter, thi' outer joints not longer than wide; ab- 

 domen quite coarsely punctured ; length 5 mm. .-equalis. 

 //. Head quadrate, not narniwcil behind the o.ves; abdomen finely 

 punctulato; elytra lirownish ; length 5 mm. 743. beunnei s. 



7.'?7 (21S41. riiTLONTiiVR THOUAcicus Grav., Mon. Ool. Micr.. 1806. 170. 



Slender, snbfusiforni. Piccnus, shining; thorax and elytra dull red; 

 legs and three basal joints of antenmie lirdwuish-ycUow. .Vutenna' reaching 

 beyond Iiase of thorax, joints all longer than wide. Thorax described in 

 key. lOlytra together broader than long, not longer than thorax, rather 



