340 FAilILT XI. STAPHYLIXID.E. 



KEY TO I^'DLiXA GEXEEA OF BOLITOCHAKINI. 



a. iIe.soi?ternal process broadly truncate or emarglnate behind; middle 

 coxse widely separated ; labial palpi with two joints only. 



IV. (JYROPH.EXA. 



aa. Mescisternal proces.-; muie or les? iJOinted behind: middle rcixii:' moder- 

 ately separated or contiguous. 

 h. I.abial palpi with two joints only. 



'•. Hind tarsi with the iirst joint at least as long as the second and 

 third together ; front tai-si with the iirst joint distinctly longer 

 than the second : ligula vei-y broad and short, very broadly 

 rounded in front ; labial palpi short, their first joint swollen. 



PlACTTSA. 



re. Hind tarsi with the first joint not or only a little longer than the 



second; front tarsi with tlie first three joints equally long; ligula 



very narrow: labial palpi with both joints more or less elongate. 



(/. Labial palpi moderately long, not bristle-like ; ligula moderately 



narrow, split at tip : body depressed. T. Homalota. 



dd. Labial palpi very narrow, prominent, stiff, bristle-like; ligula 



very narrow, entire, more or less narrowed toward tip; body 



rather convex. Silusa. 



/j'v. Labial palpi with three Joints. 



e. Ligula entire. 



/. Labial palpi with the second joint as long as and s<arcely nar- 

 rower than the first. YI. Leptusa. 

 ff. Laliial palpi with the secciid joint longer and narrower than the 

 first; thorax wider than elytra. TIL Philotebmes. 

 C(. Ligula split, or bifid at tiji. Till. Boijtochara. 



IV. (TYROPH.KXA]Mannh. ls:!(). (Or., "a circle - ti) show."") 



Form short and broad; anteumv rather slun't; head strouu-ly 

 transverse; eyes prominent; third .joint of maxillary palpi thick- 

 ened; thorax short, broad, distinctly margined; elytra large, abdo- 

 men short and broad; surface smooth, shining, almost destitute of 

 hairs or punctures. The species live in fungi and are gregarious. 



KEY TO I.VDIAXA SPECIES OF GYROPH.EXA. 



II. .\nteume abruptly dilaled lieyond the fourth joint, the last seven joints 

 fiirining a limse pjii-allel club. 

 '/. i;iyti;i and aliddiiien ahiinst \\ liiill,\ black or iiiceuus. 



i;.".."!. I ORRVSClL-V. 



hb. i;)ytra aud alMlmneu aluinst wholly pale. i;:',r,. i.ob.\ta. 



nil. Autennal joints ^.'vadually enlarged from fourth joint to tip; abdomeu 



bieolored. 



c. Eyes always seiiarated by more than twice their own width; base 



and apex of abdomen pale. O37. vixula. 



re. Eyes more convex, separated hy not more than their own width: 



liasal half of abdomen pale, apex black. (;:;s. Dissiitius. 



