360 



FAMILY XI. STAPHYLINID^E. 



a time, but I once took 20 or more from among a colony of the ant 

 Camponotus pennsylvanicus beneath the bark of an elm log near 

 Bloomington. It is said that they are fed by the ants and in turn 

 exude a secretion which is much liked by their hosts. 



Tribe VII. ALEOCHARINI. 



Usually rather robust species having the head not prolonged in a 

 beak in front • inner lobe of the maxillae moderately long, its outer 

 side horn-like, its inner side leather-like, usually with long, thorn- 

 like teeth toward the tip. densely hairy behind the teeth; all the 

 tarsi with five joints. The tribe is represented in the State by five 

 genera. 



KEY TO INDIANA GEN EE A OF ALEOCHAEINI. 



a. Head prominent, more or less strongly constricted behind; first joint 

 of antennae scapif orm. but only moderately long ; epipleura of thorax 

 always visible from the side; third to fifth dorsal segments of ab- 

 domen always transversely sulcate or constricted. 

 h. First joint of hind tarsi shorter than the fifth joint and shorter than 

 second and third together ; body small, linear ; third to sixth dorsal 

 segments of abdomen transversely sulcate. XXII. Phlceopoea. 

 bb. First joint of hind tarsi longer than the fifth joint and at least as 

 long as the second and third together. 

 c. First joint of antennae at most only obliquely emarginate at the 

 very tip. XXIII. Calodeea. 



cc. First joint of antennae obliquely sulcate or emarginate (for the re- 

 ception of the second joint) in the apical fourth or fifth. 



XXIV. Amaeochaea. 



aa. Head not or only very feebly constricted behind, its base retracted or 

 only moderately prominent ; first joint of antennae never scapiform. 

 a. Maxillary palpi with four, labial palpi with three joints. 



XXV. OXYPODA. 



(Id. Maxillary palpi with five, labial palpi with four joints. 



XXVI. Aleochaea. 



XXII. Phlceopora Erich. 1837. (Gr., "bark f to walk.") 



Elongate, narrow forms having the head rather broad, strongly 

 constricted; abdomen elongate and parallel. 



G85 ( ). Phlceopoba subl.evis Casey. Trans. Acad. Sci. St. L.. XYI, 



190G, 310. 



Elongate, slender, parallel. Dark brown, feebly shining; head and ab- 

 domen piceous ; antenna? fuscous, the basal joints and legs yellow. Antenna? 

 reaching base of thorax, the outer joints transverse. Thorax as long as 

 wide, sides rounded in front of middle, thence nearly straight to base, disk 

 finely and sparsely punctured. Elytra a third wider and a little longer than 



