THE HANDSOME FUNGUS BEETLES. 



535 



KEY TO INDIANA GENERA OF M YCETiEINiE. 



a. Body rounded or oval, pubescent. 



b. Antenna? 10-jointed; thorax with well marked basal lines, extending 



half the length. I. Rhymbus. 



1)1). Antenna? 9- join ted ; thorax with a large, finely margined basal lobe 

 and a basal line each side running forward and then curving in- 

 wards. Anamorphus. 

 aa. Body oblong or elongate. 



c. Pubescent ; base of thorax not, or very feebly, narrower than middle. 



but slightly narrower than base of elytra. II. SymbIotes. 



cc. Glabrous ; base of thorax distinctly narrowed, that of elytra very evi- 

 dently the wider. 



d. Thorax unspotted, with deep basal impressions and lines extend- 

 ing from base half the length. III. Rhanis. 

 dd. Thorax with black spot on center and with deep impressions, with- 

 out lines; antennal club of male very large. (Fig. 4. No. 8.) 



IV. Phymaphora. 



I. Rhymbus Gerst, 1858. 



Very small, convex, pubescent species, having the thorax deeply 

 impressed on each side; labrnm prominent and truncate; antennal 

 club abruptly 3- join ted and sides of thorax strongly margined. 

 They resemble the members of the genus Scymnus of the Cocci nel- 

 lidae, but are readily distinguished by the narrow. 4- jointed tarsi. 

 Two species and one variety occur in the State on old fungus-cov- 

 ered logs. 



1021 (3175). Rhymbus ulkei Crotch. Trans. Amer. Ent. Soc, IV, 1873, 



362. 



Subhemispherical, globose ; strongly pubescent. Disk of thorax and ely- 

 tra dark reddish-brown, the margins and suture narrowly paler ; antennal 

 club black. Thorax obsoletely punctulate ; elytra finely and rather sparsely 

 punctate. Length 1.7 mm. 



Vigo, Posey. Crawford and Dubois counties; frequent. April 

 18-August 10. 



1021a ( ). Rhymbus ulkei granulatus var. nov. 



Differs from ulkei in having the elytra densely granulate-punctate and 

 the pubescence a little more sparse. Length 1.6 mm. 



Lake County ; rare. April 15. 



1022 (3176). Rhymbus minor Crotch loc. cit. 



Smaller and less globose than ullcei. Uniform light reddish-brown 

 throughout. Length 1.3 mm. 



Monroe. Dubois, Posey, Clark and Perry counties; scarce. April 

 20-Oetober 10. 



Anamorphus pusillus Zimm., pale reddish-brown, length 1-1.2 

 mm., has been taken by Dury near Cincinnati. 



