312 



FAMILY X. PSELAPHIDiE. 



farther apart and near the eye. Thorax as long as wide, narrower in front 

 than in lacustris, the median foveas nearly circular, the ones on sides small. 

 Elytra more convex, the lines or striae less deep. Length 1.7 mm. 



Jackson and Crawford counties; scarce. August 15-October 14. 



P. consohrinus Lee, pubescence very dense, giving a very rough 

 appearance, is said to occur "east of the Mississippi River," but 

 has not yet been taken in the State. 



VI. Cedius Lee. 1849. (Gr., "careful.") 



Antennal tubercles wider than long, contiguous; last two joints 

 of maxillary palpi unequal, the fourth oblong, thicker; front fe- 

 mora each with three strong spines on basal half. Two of the three 

 species are known from the State. 



KEY TO INDIANA SPECIES OF CEDIUS. 



a. Larger and more robust, 2.5-2.7 mm. ; head transversely excavated be- 

 tween the antennal cavities. 596. ziegleri. 

 aa. Smaller and more narrow, not over 2 mm. ; head not excavated at apex. 



597. spinosus. 



596 (1867). Cedius ziegleri Lee, Best. Journ. Nat. Hist, VI, 1849, 74. 



Fuscous-brown, clothed with short dense oppressed hairs. Head as 

 long as wide ; disk between the prominent eyes convex, punctured and with 

 two circular foveas ; sides with a spine behind each eye. Antenna? nearly 

 half the length of body ; joints 2-4 equal, as long as wide, fifth smaller, sub- 

 globular ; sixth and seventh equal, globular, eight shorter, transverse and in 

 male with its inner side prolonged as a flat tooth ; 9-10 wider, eleventh much 

 larger. Thorax convex, as long as wide ; disk sparsely and rather finely 

 punctate, with two small fovea? near apex and a larger ore each side near 

 base, the latter two connected by a curved line. Elytra one-third wider 

 than long, sparsely and rather coarsely punctate ; each with a wide shallow 

 groove on basal third. Abdomen slightly narrower than elytra, broadly 

 margined, the first dorsal with a carina each side. Length 2.7 mm. (Fig. 

 148, 6.) 



Putnam and Crawford counties ; scarce. March 28-May 28. 

 Taken from nests of ants (Formica rufa integra.) 



597 (1868). Cedius spinosus Lee, Bost. Journ. Nat. Hist, VI, 1849, 75. 

 Resembles ziegleri in form and color but smaller and less densely pu- 

 bescent. Head broader than long. Antennae similar, with the outer joints 

 less enlarged. Thorax very finely and sparsely punctate, without fovea? on 

 front half, the basal fovea? smaller and connected by a fine impressed line. 

 Elytra as in ziegleri, but more finely and sparsely punctate. Abdomen con- 

 vex, the first segment with carina?. Length 1.8-2 mm. (Fig. 148, a.) 



Marshall and Fulton counties ; rare. April 31-May 3. 



