314 



FAMILY X. PSELAPHIDJE. 



evenly curved, disk faintly, irregularly and coarsely punctate, with a small 

 median triangular fovea near base and a smaller rounded one each side, 

 the three connected by a fine curved impressed line. Elytra one-fifth longer 

 than thorax, fiuely punctate, each with a short basal groove and fovea. 

 Length 1.8 mm. (Fig. 147, c.) 



Monroe County; rare. May 13. Sifted from debris of beech 

 stump. Dury finds them at Cincinnati between April 2 and May 2, 

 ' ' in the decayed interior of a standing dead tree. ' ' 



Pselaphus longiclavus Lee, blackish-brown, elytra blood-red, 

 length 1.8 mm., is known from Iowa to Louisiana, P. bellax Casey, 

 dark reddish-yellow, length 1,4 mm., was described from Michigan. 



IX. Tychtjs Leach. 1817. (No meaning.) 



Antennas attached to the under side of the frontal tubercles, 

 which are large, close together, separated by a short canal; upper 



Fig. 149. a, Tychus lonqipalpus, b, Bythinus tychoides; c, Decarthron brendeli; d, Rybaxis brendeli. 

 All highly magnified. (After Brendel and Wickham.) 



surface of head with a small puncture each side near the front part 

 of eye. 



KEY TO INDIANA SPECIES OF TYCHUS. 



a. Thorax with four small fovea} at base and a larger one each side ; ely- 

 tra depressed, the sutural lines parallel ; third and fourth joints of 

 palpi equal. 600. longipalpus. 



ad. Thorax with five basal foveas ; elytra more convex, the sutural lines 

 curved; third palpal joint triangular, shorter than fourth. 



601. minor, 



600 (1878). Tychus longipalpus Lee, Bost. Journ. Nat. Hist., VI, 1849,82. 



Pale reddish-brown, subdepressed, sparsely clothed with long, suberect 

 hairs. Head as long as wide. Antennas longer than head and thorax, first 

 joint twice as long as second, third to eighth subequal ; ninth globular, twice 

 as wide as eighth; tenth larger; eleventh ovate, twice as long as tenth. 

 Thorax subglobular, slightly wider than long, widest at middle; basal fovea 



