THE COMB-CLAWED BARK BEETLES. ]279 



V Mycetociiares Latr. 1829. (Gr., "fungus + to delight in.")' 



Small oblong brownish species, usu.ally having the humeri of 

 elytra dull red, and the last joint of maxillary palpi a robust right- 

 angled triangle. They feed on fungi and occur beneath bark. The 

 outer covering is very brittle, breaking easily when handled. Casey 

 recognized 22 species, seven of which have been taken in the State, 

 while several others doubtless occur. 



KEY TO INDIANA SPECIES OF MYC'ETOCHARIOS. 



a. Front coxae separated by a distinct prosternal siiine. 



6. Elytra eacla with a pale reddish spot (in humerus or near base. 



c. Elytra without distinct rows of punctures; thora.v as wide or near- 

 ly as wide as the base of elytra. 

 d. ICycs small, separated by two to four times their width. 



c. Pubescence very short, sparse and ineonsplcuous ; t'orni nar- 

 row and convex ; t^\'(l strise evident near the suture. 



2368. HALDEMANi. 



cr. I'ubescence normal; form broader and mure depressed ; sutural 

 strife very faint. 2369. fbatekna. 



dd. Eyes very Jar^'e, sep.arated Ijy less than their own width; elytral 

 lines impressed on inner half. 2370. miogalops. 



vr. Elytra with distinct rows of rather large punctures; thorax at 

 base narrower than the elytra. 

 /. Elytra twice as loni; as wide ; thorax with three basal impres- 

 sions. 'S-ill. FOVEATA. 



//. Elytra distinctly more than twice as long as wide; thorax wilh 

 two basal impressions. 2372. tenuis. 



hT). Elytra without pale humeral spot. 



0. Thorax much narrower than elytra, but slightly wider than head, 



sparsely punctate. gkacilis. 



gg. Thorax scarcely narrower than elytra, much wider than head, 



coarsely and densely punctate. edfipes. 



aa. Front coxaj contiguous or separated by a vei-y thin prosternal spine. 



//. Elytra with a red humeral spot. 



i. Thorax narrowly and abruptly flattened at the sides. jiarginata, 

 )■/. Thorax not flattened at the sides. 



./. Eyes rather small, separated by twice their width; thorax ecpial 

 ill width to elytra. 2:i7:!. iiinotata. 



//. Eyes larger, separated by slightly more than their width; tho- 

 rax narro\^-er than el.\'tra. 2374. lonqula. 

 hh. Elytra without humeral red spot; thorax coarsely, rather densely 

 punctured. 

 /,■. Eyes separatwl by at least twice their width; cdlor piceons-browu 

 to black. 

 /. Thorax not flattened at the sides ; antennie, legs and under sur- 

 face reddish-brown, the last two ventral segments paler. 



analis. 

 L81— 23402] ; 



