Casey — Observations on the Staphylinidae. 185 



projection by a short and broad undepressed isthmus, which is however 

 notably longer than in Trachyota ; prosternum nearly as in that genus 

 but much shorter before the coxae, the head larger and the eyes much 

 more developed ; antennae short or long; neck wide, two-thirds to four- 

 fifths as wide as the head ; prothorax generally transverse, usually more 

 or less impressed in the middle posteriorly and with a short transverse 

 impression before the scutellum; elytra not prominent along the sides; 

 abdomen generally somewhat narrower than the elytra though always 

 broader than in Tachyusa, with the three basal tergites deeply and 

 subequally impressed at base; legs moderate, the hind tarsi short, with 

 the basal joint generally much shorter than the next two combined. 

 America and Europe Gnypeta 



Body rather slout, nearly as in Gnypeta but clothed throughout, including 

 the legs and tarsi, with extremely fine short pale and subdecumbent 

 hairs, the basal angles of the prothorax not at all rounded; mesosternal 

 process not extending quite to the middle of the coxae, strongly nar- 

 rowed to the broad and arcuato-truncate tip, which attains, on a 

 slightly different level, the apex of the very elongate broad metasternal 

 projection ; prosternum before the coxae short, with an obtusely rounded, 

 short posterior projection; neck three -fourths as wide as the head, the 

 eyes large and somewhat coarsely faceted; antennae very slender 

 with the second joint much longer than the third; abdomen broad with 

 the first three tergites feebly impressed at base; legs long and slender, 

 the hind tarsi filiform, nearly as long as the tibiae, with the basal joint 

 somewhat longer than the next two combined, two to four rapidly de- 

 creasing in length, the fifth very short, the claws slender, arcuate. So- 

 noran fauna Telinsa 



4 — Form moderately stout, nearly as in Gnypeta throughout ; mesosternal 

 process extending to the middle of the acetabulaand separated from the 

 acutely rounded apex of the metasternal projection by a very narrow, 

 rather long and distinctly depressed isthmus; prosternum short before 

 the coxae; head moderate, with well developed and rather prominent 

 eyes, long antennae and unusually elongate third joint of the maxillary 

 palpi, the neck broad, fully three-fourths as wide as the head; pro- 

 thorax, elytra and abdomen as in Gnypeta, the first three tergites broadly, 

 strongly and subequally impressed at base ; legs longer, the hind tarsi 

 rather long, slender and filiform, with the basal joint subequal to the 

 next two combined- Europe ^Ischnopoda 



Form very slender, convex; mesosternal process extending rather beyond 

 the middle of the acetabula and just attaining the acutely rounded tip 

 of the narrow metasternal projection, without intervening isthmus; 

 prosternum short though rather strongly and posteriorly angulate be- 

 fore the coxae ; head moderate, the antennae slender, the third palpal 

 joint much longer than the second, the eyes well developed; neck about 

 three -fifths as wide as the head; prothorax generally somewhat trans- 

 verse, the elytra well developed, angulate externally at tip ; abdomen 

 very narrow, clavate, with the first three tergites very deeply impressed 

 at base, the impressions coarsely sculptured and divided on the median 

 line by a fine carina which joins the raised basal margin; legs long, 



