458 



FAMILY XI. — STAPH YLINIDiE. 



KEY TO GENERA OE PHLCEOCHARIN^E. 



a. Thorax not carinate ; maxillary palpi filiform ; mandibles simple. 



Omsteuerus. 



aa. Thorax with four carina?; maxillary palpi, awl-shaped; mandibles 

 toothed. Pseudopsis. 



Pseudopsis columbica Fauv., reddish-brown, 2.5-3.5 mm. in 

 length has been taken in numbers near Detroit. 



Subfamily VII. EUAESTHETINAE, 



Small, rather slender species having the antennae inserted before 

 the eyes at the base of the labrnm ; tarsi four-jointed ; eyes moderate 

 in size, convex, coarsely granulated, located very close to the base of 

 head; labrnm usually denticulate in front; antennae, mouth parts 

 and thorax much as in the subfamily Steninas. Three genera repre- 

 sent the subfamily in the United States. Specimens of but one of 

 these have been taken in Indiana, though those, of the others may 

 occur. The only paper treating of the subfamily is by : 



Casey. — "Contributions to the Descriptive and Systematic Cole- 

 opterology of the United States," Part I, 1884 (published 

 privately) . The genera Eumsthetus and Edaphus are treated 

 on pp. 18-31. 



KEY TO GENERA OF EIL3LSTHETTNJE. 



a. Abdomen margined. 



6. Labrnm with a row of comb-like teeth in front; head between the 

 eyes convex ; thorax without fovea near base ; first dorsal segment 

 of abdomen without a carina. LXIX. Eumsthetus. 



hit. Labrnm without teeth; head bi-impressed between the eyes; thorax 

 with several deep foveas along the base ; first dorsal with a median 

 carina. Edaphus. 

 aa. Abdomen not margined. Stictocranius. 



LXIX. Eumsthetus Grav. 1806. (Gr., "easily perceived. ") 



Ten species of this genus are listed by Casey, loc. cit.; nine of 

 which he describes as new. Two of the ten have been taken in the 

 State. 



KEY TO INDIANA SPECIES OF EU2ESTHETUS. 



a. Elytral suture distinctly shorter than thorax ; color pale reddish-brown ; 

 length 1-1.2 mm. 886. Florida. 



aa. Elytral suture as long as thorax; color piceous; length 1.2-1.5 mm. 



887. AMERICANUS. 



886 (2474). Eumsthetus florid^ Casey, Contrib. Coleop., I, 1884, 21. 



Elongate, slender. Pale reddish-brown ; finely and sparsely pubescent. 

 Head slightly wider than long, rather coarsely, not closely punctate. Tho- 



