360 FAMILY XT. STAPHYLINID^I. 



a time, but I once took L?0 or more from among a colony of the ant 

 ('<IHI/HU>IHK 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 seeretion which is much liked by their hosts. 



Tribe VII. ALEOCHARIM. 



Usually rather robust species having the head not prolonged in a 

 beak in front; inner lobe of the maxilla 1 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 GENERA OF ALEOCHARIM. 



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

 of antenna- scapiform. but only moderately long; epipleurn of thora-c 

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

 domen always transversely silicate or constricted. 



/(. 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. PHLCEOPORA. 



lilt. 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 antenna- at most only obliquely emarginate at tin- 

 very tip. XXIII. CALODEUA. 

 f-c. First joint of antenn.-e obliquely snlcate or emarginate (for the re- 

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



XXIV. AMAROCITAKA. 

 </<,'. Head not or only very feebly constricted behind, its base retracted or 



only moderately prominent; first joint of antenna- never scapiform. 

 '/. Maxillary palpi with four, labial palpi with three joints. 



XXV. OXVI-ODA. 

 dil. Maxillary palpi with five, labial palpi with four joints. 



XXVI. ALEOCIIARA. 



XXII. PHLCEOPORA Erich. 1837. (Gr.. "bark - to walk.") 



Elongate, narrow forms having the head rather broad, strongly 

 constricted; abdomen elongate and parallel. 



i;xr (- -). PHLCEOPOKA st r.i.v.vis Casey. Trans. Acad. Sci. St. L.. XVI, 



190(1. :;io. 



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

 domen pic-eons; antenna- fusci.us. 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. F.lytra a third wider and a little longer than 



