INK SUOIiT-U'lNUUJ) SCAVUMiKT, P.KF.TU'S. 44: 5 



KEY TO GENERA OF TRICHOPYINI. 



a. Body broad, narrowed behind, clothed with long, sparse, bristly hairs; 

 thorax narrowed in front, not impressed. LXI. TRICHOPSENIUS. 



aa. Body narrower ; thorax not narrowed in front, with an apical impres- 

 sion, the bottom of which is niemhranons. XENISTUSA. 



LXI. TRICHOPSENTUS Horn. 1877. (Gr., ''little hair + like.") 



Kepresentecl in southern Indiana and southward by one small 

 form having the tibite distinctly spinnlose. middle coxa? contiguous; 

 abdomen and elytra not margined. 



848 (2602). TRICHOPSENIUS DEPRESSES Horn, Trans. Arner. Ent. Soc., VI, 



1877, 88. 



Oblong, depressed. Brownish-yellow, glabrous, very shining and with- 

 out punctures. Thorax nearly twice as wide as long, sides slightly curved, 

 base truncate, hind angles acute. Elytra each quadrate, as long as broad, 

 together not wider and a little shorter than thorax, and with three trans- 

 verse rows of erect yellowish hairs. Abdomen conical and bearing numerous 

 sparse, erect hairs. Length 1.2 mm. 



Crawford County. May 15. Four or five specimens were taken 

 in the nests of Termes flavipes Koll., beneath flat stones near the 

 mouth of Wyandotte Cave. 



Tribe III. TACHYPORINI. 



Rather short, broad species, with a conical abdomen, which is 

 never turned upward when disturbed, as is the habit of most other 

 Staphylinids. They occur in fungi, dung and other decaying matter. 



KF.Y TO INDIANA GENERA OF TACHYPORINT. 



n. Abdomen with a narrow margin; tibire witli a fringe of uneven spiuulcs 



at tip. 

 h. Mesosternum not carinate. 



c. Maxillary palpi filiform; body oblong, somewhat depressed, mod- 

 erately tapering; length ?>-(> mm. LXII. TACHINTJS. 

 cc. Maxillary palpi awl-shaped; body short, convex, abruptly tapering; 

 length less than o mm. LXIII. TAOHYPORUS. 

 hl>. Mesosternum carinate; maxillary palpi filiform; front tarsi of male 



simple. 



<L Elytra not extended at sides below the body. CILEA. 



dd. Elytra projected at the sides below the body. LXIV. ERCHOMUS. 



(ia. Abdomen not margined; surface finely pubescent; tibire with a fringe 



of equal spines at tip. LXV. CONOSOMA. 



LXII. TACHINUS Grav. 1802. (Gr., ''swift.") 



A large genus, the species of which are very difficult to separate, 

 unless both sexes are present. The males have the front tarsi always 

 dilated and the last or seventh ventral segment deeply divided, form- 



