THE HAIRY PaNGUS BEETLES. 583 



LcContc. — "Synopsis of the I\ryeetophagicIa3 of the United 

 States," in Proc. Phil. Aoad. Nat, Sci., VIII, 1S56, 12-15. 



Horn.—' ' Tables of the Species of Mycetophagus and Litargus, ' ' 

 in Proc. Amer. Phil. Soc, XVIT, 1878, 603-608. 



('asey. — "Rpview of the American Tritomidte (Mycetophagi- 

 da-)," in Jonrii. N. Y. Ent. Soc, VIII, 1900. 128-138. 



Of the five North American genera, four are rt'|ircsented in 

 Indiana. 



KEY TO INDIANA OENEHA OF MYOETOPIIAGTD.^E. 



(I. Basal iingles of tliorax well defined ; length 1.5 or more mm. 



6. Eyes transverse, sinuate in front ; anteimiB gradually enlarged, usual- 

 ly without distinct club ; epipleura horizontal and flat. 



I. Mycetophagus. 



hh. Eyes more rounded, not sinuate; antennae with joints 9-11 suddenly 



larger. 



c. Clypeal suture not deeply impressed ; body much smaller and more 



oval ; epipleura concave, rapidly descending. II. Litargtjs. 



cc. Clypeal suture deep ; epipleura horizontal and flat. 



III. TyPH/EA. 

 (la. Hind angles broadly rounded; length less than 1 mm. 



IV. Theimolus. 



I. Mycetophagus Hellw. 1792. (Gr., "mushroom + eating.") 



Oblong-oval, moderately convex insects, clothed rather sparsely 

 with short, stiff, reclined hairs. Six species have been taken in 

 Indiana. 



KEY TO INDIANA SPECIES OF MYCETOPHAGUS. 



0. AntennfE gradually larger toward tips ; body broadly oblong-oval ; sub- 

 basal fovere of thorax deep and distinct. 

 6. Thorax widest at base. 



c. Last joint of antennae elongate, distinctly longer than the two pre- 

 ceding combined ; size larger, 4.5 or more mm. 



1111. PUNCTATUS. 



cc. Last joint of antennae shorter, never longer than the two preceding 

 combined ; size smaller, not over 4 mm. 

 d. Prosternum nearly smooth at middle. 1112. flexuosus. 



dd. Prosternum densely and coarsely punctured; antennae with a 

 feeble, parallel 4-jomted club. 111.3. eipustulatus. 



hi). Thorax narrower at base than at middle; antennal club 5-jointed. 

 e. Margin of thorax entire, the disk coarsely and deeply punctured. 



1114. MELSHEIMEBI. 



ee. Margin of thorax serrulate; elytra with numerous small yellow 

 spots. 1115. pluripunctatus. 



(Id. Antennae with last three joints rather suddenly larger ; thorax without 

 sub-basal fovea ; elytra piceous spotted with yellow. 



1116. OBSOLETUS. 



