OLEOPTERA OF SOUTHWESTERN PENNSYLVANIA. 357 



Philonthus politus and asper. — Both abundant, occur together, and require 

 care to separate; furvus, rare ; Isetulus Say, common in fungi ; hepaficus, rare ; 

 palliatus, rare ; debilis, common in fungus ; varians, thoracicus, fusiformis and 

 micans ai'e rare ; lomatus and brunneiis, common ; eyanipennis and lietuhis, 

 common in fungi ; quediinus, one example only ; sordklus not common ; ni- 

 gritulus and microphthalmus, abundant in wet places ; apicalis, viridanus, of each 

 one example ; confertus, not rare, near streams. 



Actobius cinerascens. — Not rare, near streams ; fraterculus, rare, wet places ; 

 sohrinus, abundant in wet places ; parens, rare, under bark ; psederoides, com- 

 mon about streams; jocosus, rafe, in wet places. 



Xantholinus fulg'idus. — Three examples : the other species are common. 



Leptacinus longicollis. — Not common, under bark. 



Baptolinus longiceps. — Eare under bark here and among the mountains. 



Stenus. — Besides the species listed, there are several undetermined. 



Eusesthetus americanus. — Swampy places, minute. 



Edaphus nitidus. — Not common, St. Vincent. 



Stictocranius puncticeps. — Not rare, under leaves. 



Cryptobium badium. — Not rare; bieolor, common ; pallipes and laf.ebricola, not 

 rare, under bark; cribratum, wet places. 



Lathrobium grande. — Under rubbish and leaves, etc., on low ground ; panc- 

 tidatam, not rare ; angulare, rare, in swamps ; bieolor, not rare ; armatum, com- 

 mon ; the other species are not common. 



Stilicus. — The species are common, under bark, etc. ; hiarmatus is frequent in 

 early Spring under stones, etc., on grassy hillsides. 



Androchara corticina. — Common on the ground under rubbish, sometimes 

 under bark ; Trnchysectus confluens is common under bark. 



Pinophilus latipes. — Not abundant, under rubbish in damp places, under bark. 



Tachinus memnonius, flavipennis, luridus, fimbriatus and pallipes, abundant in 

 decaying fungi and rejectamenta of herbivorous animals; repandus is rare, 

 in swamps ; limbntus, low grounds under rubbish : fumipennis, not uncommon, 

 various i)laces ; nitidnloides, twice, gregarious like the other species. 



Taohyporus nanus and nitidulus are common under stones on grassy hill- 

 sides in early Spring ; the other species are not uncommon. 



Cilea silphoides. — Gregarious, occurred once, also at St. Vincent. 



Conurus littoreus, knoxii and scriptus not common ; the other species are 

 abundant. 



Boletobius niger is rare; the other species are fairly common, all feeding on 

 fungi ; var. gentilis is rare. 



Bryopus rufescens. — Common under things in early Spring. 



Mycetoporus humidus Say, not rare, decaying vegetatioji. 



Olisthserus substriatus, rare, under bark. 



Megalops ccBlatus, rare, under bark, under small fungi. 



Oxyporus. — The species all feed on fungi; stygicus, lepidus, A- mac ulatus aud oc- 

 cipitalis are less common ; a black headed variety of A-maculatus occurs at St. 

 Vincent. 



Osorius laiipes, not common, here and at St. Vincent. 



Bledius semiferrug-ineus and annularis, not common, along streams ; stabilis 

 common on grassy banks of streams; emarginatm excessively abundant. 



Platystethus americanus, common under dung, rubbish, etc. 



TRANS. AM. ENT. SOC. XXII. OCTOBER. 1895. 



