278 Trans. Acad. Sci. of St. Louis. 



middle of tbe acetabula; elytra with asperate punctures throaghont; 

 body minute In size 5 



Eyes very large, occupying tbe entire sides of tbe head, very coarsely faceted, 

 the tempora obsolete; mesosternal process extending scarcely to the 

 middle of the acetabula ; elytra with very feeble and sparse or Irregu- 

 lar sculpture ; body larger In size 6 



6 — Ifetasternal projection truncate at tip, abutting against the meso- 

 sternum throughout Its width; antennae gradually incrassate from 

 tbe fourth joint to the tip; elytra very long; first two abdominal seg- 

 ments equal in length. Europe * Agarlcochara 



Metasternal projection rounded at tip, touching the mesosternum only 

 at the middle; antennae shorter, abruptly dilated beyond tbe fourth 

 joint, the last seven joints forming a loose parallel club; elytra short; 

 basal segment of the abdomen much shorter than the second. Atlantic 

 North America Eamicrota 



6 — Mesosternal process broadly sinuate at tip, separated from the arcu- 



ato-truncate tip of the metasternal projection by a very short discon- 

 tinuity on exactly tbe same level ; antennae slender, gradually Incras- 

 sate from the fourth joint to the tip; abdomen with the first segment 

 as long as the succeeding, the first three tergltes broadly, subequally 

 and distinctly Impressed at base, the fourth also feebly concave almost 

 throughout its extent; elytra moderate in length, always longer than In 

 Eumicrota but much shorter than In Agaricochara; Integuments thin and 

 translucent as in Qyrophaena. Atlantic regions of North America. 



Fhanerota 



7 — Body nearly as in Phanerota but with the eyes moderate In size and finely 



faceted and the abdominal segments gradually decreasing In length 

 toward base, the first two tergltes rather narrowly, more abruptly 

 and distinctly, though not strongly, Impressed at base, the third and 

 fourth broadly and feebly Impressed and the fifth also usually some- 

 what concave In the median part of the disk; prothorax variable In 

 form, the elytra moderately developed and feebly sculptured as a 

 rule, as in Phanerota; antennae variable, either gradually incrassate 

 from the fourth joint to the tip or with a long loose parallel club com- 

 posed of the outer seven joints; metasternum broadly arcuate, 

 the mesosternal process arcuato-truncate, with obliterated suture. 



Cosmopolitan Gyrophaena 



Body minute, nearly similar but with dense Integuments, smaller and more 

 elongate head and longer elytra, punctate as in Agaricochara; abdominal 

 segments slightly decreasing In length toward base, the first three 

 tergltes rather narrowly and feebly though distinctly and equally im- 

 pressed at base, the fourth and fifth scarcely at all Impressed; 

 antennae gradually incrassate from the fourth joint to the tip, slender; 

 mesosternal process extending to the extreme tip of the acetabula, 

 where It Is transversely truncate, abutting against the truncate or 

 scarcely arcuate metasternum. Europe *Phaenogyra 



8 — Mesosternal process extending to the extreme tips of the coxae, very 



broad and abutting closely against the metasternum, the suture dis- 

 tinct and transversely rectilinear; head as In Qyrophaena, the neck 

 very broad, the eyes moderate and finely faceted; antennae slender. 



