THE MINUTE BROWN SCAVENGER BEETLES. 



653 



R. Jcunzei Aube, dull reddish-yellow, 1-1.2 mm. in length, eyes 

 larger, distant by only half their diameter from the antennas, tho- 

 rax with small discal fovea, is recorded from New York and Cali- 

 fornia. 



Tribe II. LATHRIDIINI. 



In addition to characters given in above key, the members of 

 this tribe have the thorax with pronounced sculpture, often cos- 

 tate, and usually with impressions or foveas, the side margins with- 

 out teeth but often lightly crenulate ; elytra each with six or eight 

 rows of punctures, the intervals often more strongly elevated ; front 

 coxae distinctly separated, and abdomen composed of five segments 

 in both sexes. Eight genera are recognized as composing the tribe, 

 four of which should be represented in Indiana, though specimens 

 of but three have as yet been taken. 



KEY TO INDIANA GEN EE A OF LATHRIDIINI. 



a. Disk of thorax marked with costae or ridges; eyes on sides of head; 

 elytra not connate. 

 &. Prosternurn not reaching the hind border of the prothorax, the epi- 

 mera uniting on the median line. I. Lathridius. 



Kb. Prosternurn reaching the hind margin of the prothorax and thus 

 separating the epimera. Coninomtjs. 

 aa. Disk of thorax without costae. 



c. Eyes large, not very distant from antennae; scutellum distinct. 



II. Enicmtjs. 



cc. Eyes small or minute, remote from antennae ; scutellum indistinct ; 

 middle coxae separated. III. Cartodere. 



I. Lathridius Herbst. 1793. (Gr., "secret or hidden.' •) 



Small, glabrous, shining brown species, having the front angles 

 of thorax more or less lobed and the sides sinuately convergent to 

 a point near the middle, thence divergent to base. Elytra fully 

 twice as wide as thorax, broadly ovate with the apex somewhat 

 pointed. Seven species are recognized by Fall as belonging to the 

 North American fauna. Of these one occurs in the eastern United 

 States and Indiana, while another, breviclavus Fall, known by the 

 2- jointed club of antennae, was described from Michigan and may 

 inhabit the northern part of the State. 



1256 (3779). Lathridius liratus Lee, N. Spec. N. Amer. Col., I, 1863, 72. 



Oblong. Dark reddish or chestnut brown, shining ; legs and antennae 

 slightly paler. Antennae reaching hind angles of thorax, rather slender. 

 Thorax a little longer than wide, margin reflexed ; disk with two entire 

 longitudinal ridges which are nearly parallel on basal two-thirds, diverging 



