362 FAMILY XI. STAPHYLINID^. 



KEY TO INDIANA SPECIES OF OXYPODA. 



a. Larger, 3-3.2 mm. ; dark brown, elytra and legs paler. 



688. SAGULATA. 



. Smaller, not over 2.5 mm. 



&. Thorax subparallel aiid curved at the sides, the apex almost as wide 

 as the base, the latter as wide as the base of elytra. 



c. Dull brownish-yellow ; abdomen piceous, pale at tip, distinctly 



tapering from base to apex. 689. AMIGA. 



cc. Reddish-brown ; abdomen with only the fourth and fifth dorsal seg- 

 ments piceous, its sides nearly parallel. 690. PALUSTKIS. 

 bl>. Thorax subconical or with the apex distinctly narrower than base. 



d. Body rather slender ; abdomen feebly tapering from base to apex ; 



color chestnut brown. 691. OHLIQUA. 



dd. Body linear ; abdomen straight and nearly parallel ; color brownish- 

 yellow. 692. PEREXILIS. 



688 (2062). OXYPODA SAGULATA Erich., Gen. Sp. Staph., 1840, 146. 



Elongate, rather robust. Dark brown to piceous, sparsely clothed with 

 fine yellowish hairs ; elytra reddish-brown ; legs and basal joints of antenna? 

 iiale yellow. Antennae reaching base of thorax, the second joint slightly 

 lunger than third. Thorax one-half wider than long, the base as broad as 

 the elytra, sides moderately curved ; angles rounded, the front ones de- 

 flexed; disk finely and rather closely punctate. Elytra one-third longer 

 than thorax, more coarsely and densely punctate. Abdomen at base slightly 

 narrower than elytra, distinctly tapering behind the middle, densely punc- 

 tate, the first two segments impressed at base. Length 3-3.2 mm. 



Throughout the State; scarce. May 13-October 31. Taken by 

 sifting. 



r,so (- -). OXYPODA AMIGA Casey. Trans. Acad. Sci. St. L., XVI, 1906, 312. 

 Elongate, subfusiform. Dull brownish-yellow, clothed with rather long. 

 shaggy pubescence; head and abdomen picenus. the latter pale at tip; an- 

 tenna fuscous, the basal joints and legs pale. Antennae reaching to basal 

 third of elytra, the second joint one-third longer than third. Thorax three- 

 fourths wider than long, sides strongly curved, surface, as well as that of 

 elytra and abdomen, very finely and rather closely punctate. Elytra about 

 two-fifths longer than thorax. Abdomen at base one-third narrower than 

 elytra, thence feebly tapering to apex, the first three dorsal segments deeply 

 impressed nt base. Length 2-2.2 mm. 



Throughout the State ; one of the most common members of the 

 subfamily. January 18-December 8. Taken by sifting vegetable 

 debris in !<>\v. moist woods. Hibernates beneath mullein leaves, bot- 

 tom rails of fences and other cover. 



090 ( ). OXYPODA PALUSTRIS sp. nov. 



Rather stout, subt'usil'orm. Dark reddish-brown, shining, sparsely and 

 finely pubescent ; head, elytra and fourth and fifth dorsal segments of ab- 

 domen piceous. Antennae reaching middle of elytra, second and third joints 



