ENDOMYCHIDAE. 121 



2. Antennae lO-jointed ; protliorax with well-marked basal lines extend- 



ing half the length, sides strongly margined. Symbiotes. 



Antennae 11-jointed ; prothorax with a curved line running each side 



from base to apex : sides finely but distinctly margined. Mycetaea. 



3. Prothorax with deep basal impressions, but without lines. 4. 

 Prothorax with deep impressions, and lines extending from base half 



the length : body glabrous. Rhanis. 



Prothorax very transverse, body pubescent. Liestes. 



Prothorax not transverse, body glabrous (antennal club of % very 



large). Phymaphora. 



The two species here referred to Symbiotes have been described 

 by Crotch as Alexia, to which genus they bear no resemblance. 

 The single undescribed species which we have placed in Alexia 

 has much similarity to the European A. pilifej^a, but differs in the 

 prothorax being largely lobed at the middle of the base, with the 

 lobe truncate. It may, therefore, be named A. lohata Lee. 



Tribe II.— DAPSIIVI. 



Presternum not j^rolonged behind ; front coxae contiguous or nearly so. 2. 



Prosternum prolonged behind, partly covering the mesosternum ; front 



coxae separated. 3. 



2. Prothorax subquadrate, feebly narrowed behind ; base with a deep 



transverse line and a short longitudinal one each side, sides sinuate 

 margined ; elytra convex, suture very finely margined. 



Lycoperdina. 



3. Prosternum narrow between the coxae. 4. 

 Prosternum wide, margined : prothorax with deep transverse and 



longitudinal basal lines. 5. 



4. Prothorax without longitudinal impressions ; body elongate, last ventral 



segminit of % with a crest and impression. Xenomycetes. 



Prothorax with longitudinal and transverse lines. Aphorista. 



5. Pubesccmt. (i_ 

 Glabrous ; prothorax with finely margined sides ; elytra spott(>d. 



Mycetina. 



6. Prothorax finely margined. 7. 

 Prothorax with marginal line remote from the edge. Stenotarsus. 



7. Prothorax without transverse basal line. Epipociis. 



Lycoperdina and Stenotarsus are represented in the Atlantic 

 region; Xenomycetes in the alpine regions of California :. the 

 other genera occur on both sides of the continent. Xenomycetes 

 is remarkable for the singular crest and impressions of the last 

 ventral segment of the % . 



