1279 



THE COMB-CLAWED BARK BEETLES. '- 



y.; Mycetochares Latr. 1829. (Gr., "fpgus + to delight in.") 

 Small oblong brownish species, usually having the humeri oi 

 elytra dull red, and the last joint of maxillary palp, a robu , . - 

 angled triangle. They feed on fungi and occur beneatt ba*. The 

 ou ter covering is very brittle, breaking ; easxly when handl cd h s 

 recognized 22 species, seven of which have been taken m the Stab . 

 while several others doubtless occur. 



KEY TO INDIANA SPECIES OE MYOEXPOHABKS. 



a Front coxas separated by a distinct prosternal spine. 



\ Elytra each with a pale reddish spot on humerus or near base 



c Elytra without distinct rows of punctures; thorax as wide oi neat- 

 ly as wide as the base of elytra. 

 „ Eyes small, separated by two to four times their width 



e 'pubescence very short, sparse and inconspicuous; foim ».,,- 

 • rew and convex; two strhe evident near ^"^^ 



ee. Pubescence norma, ; form broader and more 



striae very faint. ^ivtvii 

 U. Eyes very Urge, separated by less than the, own width , elyttai 

 lines impressed cm inner halt, 

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

 bnse narrower than the elytra. 

 , b Zr» twice as long as wide ; thorax with «ah = 



tt. Elytni'distinctly more than twice as long as wide ;J>orax with 

 two basal impressions. 



- :^ v :^L v z:z:tr m - «»» ^ **** 



,, Narrower than eiytra. much wider than^head. 



V Froat ^SSS^X • - thin prosternal spine. 

 7) Fivtrn with a red humeral spot. 



f Cax narrowly and abruptly-flattened at the sides, mahoinalv 



twice Umir width, thoraxomta, 



,, iisu* ss- * -~ - - 



rax narrower than elytra. 

 W , Elytra without humeral red spot; thorax coarsely, rather dense., 



E^es Crated by at least twice their width; color pieeous-bvown 



fc. 



, Thorax not Battened at the sides; antenna, legs and under sm- 

 face reddish-brown, the last two ventral segments V*^ 



[81—23402] 



