428 



FAMILY XT. — STAPH YLTN1D2E. 



Southern half of State, frequent; much iess so northward. 

 March 6-October 10. Occurs beneath bark, vegetable debris, etc. 



Group it. (Eulathrobium.) 



This group is represented by one species which is the largest of 

 the genus. 



S19 (2511). Lathrobium grande Lee, N. Sp. N. Amer. Col., I, 1S63, 42. 



Robust, parallel. Black, shining, finely pubescent ; antennae and legs 

 dark reddish-brown. Head wider than long, rather finely, not densely punc- 

 tate, its sides rounded into the subtruncate base. Thorax oblong-oval, 

 slightly narrower than head, a little longer than wide ; disk coarsely, deep- 

 ly, rather closely punctured, with a narrow median smooth line. Elytra 

 slightly wider and distinctly longer than thorax, coarsely and densely punc- 

 tate. Abdomen as wide as elytra, finely and rather closely punctate. Sixth 

 ventral of male with a small triangular tooth at apex. Length 10-11 mm. 



Steuben and Kosciusko counties ; rare. June 26-August 13. A 

 member of the boreal fauna. 



Group I. (Latiirobiella.) 



Rather small, more or less fusiform species having the head 

 small, its sides rounded- into base; neck half as wide as head; thorax 

 rather large, oblong; elytra with the punctures in rows; abdomen 

 minutely and densely punctate. 



The following species have been taken or probably occur in the 

 State : 



KEY TO INDIANA SPECIES OF GROUP I. 



a. Form more convex, less slender; head narrower than thorax; elytra 

 piceous or dark reddish-brown. 

 &. Fifth ventral finely and densely punctate like the fourth ; elytra! 

 punctures finer, more close set ; sixth ventral of male with a broad 

 triangular notch. yentrale. 

 bl). Fifth and sixth ventrals less densely punctured; elytral punctures 

 coarser, in more regular impressed rows ; sixth ventral of male 

 with an acute triangular notch. 820. collars. 



aa. Form more slender and depressed; head equal in width to thorax; ely- 

 tra pale, distinctly longer and wider than thorax. 

 c. Eyes of normal size and prominence, situated at distinctly less than 

 twice their own length from base of head ; elytra pale reddish-yel- 

 low, with a piceous cloud near scutellum. rubida. 

 cc. Eyes notably smaller, situated at twice their own length from base ; 

 elytra pale dull yellow. 821. ambiguum. 



L. ventrale Lee, 4 mm. in length, was described from Pennsyl- 

 vania, Florida and Kansas, and therefore probably occurs in In- 

 diana. 



