THE COMB-CLAWED BARK BEETLES. 1279 



V. MVOETOCHARES Lair. 1829. (Gr., " fungus + to delight in.") 



Small oblong brownish species, usually 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 MYCETOCUAKES. 



(/. Front eoxje separated by a distinct prnsternal spine. 



&. Elytra each with a pale reddish spot <ni humcrus or near base. 



c. Elytra without distinct rows of punctures: thorax as wide or near- 

 ly as wide as the base of elytra. 

 (/. Eyes small, separated by two to four times their width. 



i'. Pubescence very short, sparse and inconspicuous; form nar- 

 row and convex; two strife evident near the suture. 



2368. HALDEMAM. 



ee. Pubescence normal; form broader and more depressed ; sulural 



strife very faint. 2309. FRATER.NA. 



ilil. Eyes very large, separated by less than their own width; elytra 1 



lines impressed on inner half. 2370. MEUAUH-S. 



cc. Elytra with distinct rows of rather la rye punctures; thorax at 



base narrower than the elytra. 



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

 sions. 2371. FOVEATA. 

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

 two basal impressions. 2372. TENUIS. 

 lib. Elytra without pale humeral spot. 



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

 sparsely punctate. GRACILIS. 



;/.'/. Thorax scarcely narrower than elytra, much wider than head, 

 coarsely and densely punctate. RUFJPKS. 



aa. Froat coxa 1 contiguous or separated by a very thin prosternal spine. 

 It. Elytra with a red humeral spot. 



i. Thorax narrowly and abruptly flattened at the sides. MARGINATA. 

 //'. Thorax not flattened at the sides. 



./. Eyes rather small, separated by twice their width: thorax e<|iial 

 in width to elytra. 2:!7.".. m. \OT.\TA. 



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

 rax narrower than elytra. 2374. LONGULA. 

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



punctured. 

 /,-. Eyes separated by at least twice their width; color piceous-brown 



to black. 



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

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



ANALIS. 



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