382 FAMILY XI. STAPHYLINID^. 



finely but not densely punctured, sparsely clothed with yellowish hairs. 

 Abdomen slightly narrower than elytra, more finely and densely punctate. 

 Male with last ventral acutely and deeply notched. Length 4.5-5.5 mm. 



Throughout the State; frequent. April 8- August 15. Occurs 

 on fungi and beneath dead leaves and logs. The abdominal seg- 

 ments have their apical margins always paler. 



GROUP B. 



In this group the front tarsi are dilated and there are four 

 punctures in each of the dorsal rows of thorax. The males are 

 readily separated by the notch of the last ventral segment. 



KEY TO INDIANA SPECIES OF GROUP B. 



a. Front tarsi of males very broadly dilated, sometimes plate-like. 



&. Thorax oval, distinctly narrowed in front; elytra black or piceous, 

 coarsely not closely punctured ; length 6.5-8 mm. 732. UMBRINUS. 

 ftft. Thorax quadrangular, very little narrowed in front. 



c. Elytra clear red, very sparsely and rather finely punctate. 



733. PALLIATUS. 

 cc. Elytra black or piceous, at least moderately punctate. 



d. Black; last ventral of male with a rather deep, lengthwise im- 

 pression extending nearly to its base. 734. QUADRICOIJJS. 

 dd. Brownish or piceous; last ventral of male without a lengthwise 

 impression ; legs and basal joints of antennae pale. 



735. DEBILIS. 

 aa. Front tarsi of males moderately dilated, sometimes very little wider 



than in the female. 



e. Larger, 5-7.5 mm.; antennae slender, the outer joints longer than 

 wi.de. 



f. Elytra rather densely punctured; abdomen very distinctly punc- 



tured. VARIANS. 



ff. Elytra sparsely punctured, slightly bronzed; abdomen very indis- 

 tinctly punctured. 736. LONGICORNIS. 

 ee. Smaller, not over 5 mm. ; antenna? slender, outer joints quadrate. 



g. Thorax as wide as long; hindmost dorsal puncture distant from 



the third. DISCOIDEUS. 



;ii/. Thorax longer than wide ; punctures equidistant. THERMARUM. 



732 (2169). PHILONTHUS UMBRINUS Grav., Mon. Col. Micr., 1806, 169. 



Moderately elongate, rather robust. Body black, strongly shining ; legs 

 piceous or dull brownish-yellow. Antenna? reaching middle of thorax, joints 

 4-10 gradually shorter and wider than long. Head subquadrate. front with 

 two pairs of punctures above each eye; hind angles sparsely punctate. 

 Thorax convex, slightly longer than wide, the hindmost puncture somewhat 

 distant from the third. Elytra slightly wider than thorax, sparsely clothed 

 with brownish hairs. Abdomen iridescent, sparsely and rather coarsely 

 punctate. Last ventral segment of male deeply notched, the margins of 

 the notch grooved. Length 6.5-8 mm. 



Vigb County; rare. July 1. Taken from decaying fleshy fungi. 



