422 FAMILY XI. STAPHYLINID.K. 



!). Form larger, more robust, length 6 or more mm. ; neck broad, 

 more than half as wide as head; elytral punctures in rows. 



Group F. Latheotaxis. 



gg. Form small, slender, length less than 5 mm.; neck distinctly less 



than half as wide as head ; elytral punctures coarse and sparse. 



arranged in rows. Group G. Linolathba. 



(■('. First joint of hind tarsi distinctly shorter than second. 



li. Body liirsf, stout, parallel; length 9 or more mm.; gular sutures 

 less sejiarated, nearest t(i,ii<'ther at base of head. 



Group H. EULATHROBIUM. 



7(7). Body slender, less than ti mm. : gular sutures widely separated, 

 nearest together in front, farthest apart at base of head. 

 i. Elytra longer and wider than thorax; head small and, in our 

 species, dark; body more (ir less fusiform. 



Group I. Latheobiella. 

 //. Elytra small, shorter than thorax; head larger, as wide as ely- 

 tra and pale in color ; body parallel. 



Group J. ]\riCR0IATHRA. 



Geoup a. (Aptbratjum.) 



To this gri)up Casey a.scribcs twci species, oue of which occurs iu 

 Indiana. 



808 (2521). LATHROiai M beevipenne Lcc, N. S]). N. Am. Col., I, 18(r,, 44. 

 Elongate, rather slender. Dark reddish-lirown to piceous, shining; legs 

 and antennae reddish-brown. Head as wide or slightly wider tlian thorax, 

 sides parallel, base truncate, hind angles rounded; surface coarsely and 

 rather closely punctate behind the eyes, smooth at middle. Antennae very 

 stout, the .joints ol>conieal, the basal joint robust. Thorax oblong, one- 

 fifth longer than wide, sparsely and coarsely punctured, with a broad me- 

 dian smooth space. El.^■tra but slightly more than half the length of thorax, 

 rather coarsely and sparsely punctate. Abdomen as wide as elylra. Length 

 7.8-9 mm. 



Putnam County'; rare. i\rai'ch 25. Known heretofore from 

 Illinois, Iowa and Missouri. 



Group B. (Latheobium.) 



Rather stout, usually lar^e or mediiuii-sized sjjecies, having' the 

 thoi'ax uniformly i)unctured. with distinct smootli dorsal line; elytra 

 without a fold oi' raised line on side; basal joint of hind tarsi dis- 

 tinctly shorter than second. The following species have been taken 

 or probably occur in 1lie State: 



KEY TO INDIANA SCKenos OF ollorp 11. 



(/.. Bicoloi'ed; black, antennas legs and elytra wliolly reddisli-brown ; length 

 less than 5 mm. ; fifth ventral of male with a round discal impression, 

 sixth deeply notched at tip. bicolob. 



