BEETLES OF THE DISTRICT OF COLUMBIA— I /.KE. 



41 



ECOLOGICAL NOTES— Contimif. 



Brj/axiii, most all of the species are found 

 by beating grassy places toward sunset 

 in the early part of June; valida, two 

 specimens, near Free Bridge; belfragei, 

 two s])eci mens; (/ctiDiiifcr, one specimen. 



Jr//(;;//((.s///f;/<;ro///x, exceedingly abundant 

 under old leaves iti moist places. 



Butrims ioiiif, rare, with Lasius alienu)^; 

 mo7ii<trosuf< and ferox occur with Lasius 

 (iaviger and Interjechis; nigricans and 

 triangulifrr, only single specimens; 

 glohosus, very common. 



Trimium, sifted from decayed roots in the 

 grounds, also Iteaten from grasses at 

 sunset. 



RIte.ridlus canaliciild/KS, one specimen. 



Rhexius Insculptitx, taken a])undantly by 

 sweeping. 



Thesium carifrons, two specimens. 



Trlmioplectus arcnatus, one specimen. 



Euplectus, generally found in rotten wood. 



EatgpJilus similis, very common with 

 Piiiodi/fi's cniptophagoides. 



STAPH YLINIDyE. 



Aleochar(( lata, common under carcasses; 



the others very common under dung. 

 Orgpoda sagiUata, excessively common; 



most of the species are common under 



dung; several undescribed species. 

 Xenodusa cava, found in the nests of 



( 'ainponotus pennsylvan icut;. 

 Myrmedonia rudis, very rare; srJurarzi, in 



the nests of Lasius alimus. 

 PJiUothermespennsylvanir us, Among Ternvx, 



not rare. 

 Hoplandrla lateralis, very common under 



old leaves and carcasses. 

 Atheta, most of the species remain unde- 

 termined. 

 Tarliyusa, like Atheta. 

 Falagria hilohata, this and the other 



species are more or less abundant under 



old leaves. 

 Euryusa obtusa, not rare in the nests of 



Formica integra and exsectoides. 

 Leptusa, the sjiecies are common under 



moist bark. 

 J'lacma, like Leptusa. 

 Gyrrjpiaeiia, all si)eciHs live in toadstools. 

 Mylhvna and Diiiopsix, in old moist 



leaves and flood debris. Several genera 



and a great number of species of the 

 Aleocharime remain as yet unrecognized 

 and undescril)ed. 



Acylopliorusflavlci ill i.s -Aiu] /;;v>/(//.s', conimoii 

 under debris near water; densu.'f, very 

 rare. 



Ilefernfliops pusio, not rare. 



(Jnedi us ferox, rather rare; the others are 

 abundant under old leaves, stones, etc. 



Listotrophus ciiignhiiiix, very common un- 

 der decaying vegetable and animal 

 matter. 



Cre.ophilus r///o.sv(.s-, like the preceding. 



Staphylinns vnlpinns. niidcr old leaves, 

 coiiimoii; ii/iiciilii.'iiis, in decaying fungi, 

 dung; fosaalitr, decaying fungi; eiola- 

 ceus, very abundant in old fungi; comes, 

 exalnns, both rare under dung; pnvlon- 

 gus and viridans, each one specimen. 



Ocypus ater, rare under stones. 



Belonachus foDiiosuft, very abundant on 

 sap exuding from wounded trees. 



TynipdiiopJiin-iis pujicticollis, very rare. 



I'hiliinthiis politns, rare; umhratilis, hrfidus, 

 iiKjuietus, each one specimen; nsper, 

 not rare in the stems of toadstools; 

 hepaticus, very abundant under dry 

 leaves; umhriuus, under old leaves near 

 the river; most of the other species are 

 more or less abundant under old dung 

 or decaying lunui. 



Actobijis cinerascens, untier debris along 

 the river, common; also sohrinus and 

 ppt'deroides, very abundant; of procer- 

 idus, parrus, feriiii)i.<ilis and lepidulus, 

 single specimens. 



Xnnlhdliuu.s fulgidus and temporalis, rare; 

 eepli<dn>i, under bark of ti-ees; emmesus, 

 al)undant under l)ark and old leaves; 

 Jiamatus, common tnider decaying 

 weeds. 



Leptoliini.^ ruhripeutiix, not i-are in debris 

 along tile river. 



Leptaeiiiux, all very coimnon inider old 

 leaves. 



Diorltus schaumli, connnon everywhere. 



Stenns. Moat species of this genus live 

 on sand banks near streams, some of 

 them gregariously in great numbers ; 

 of delawarensis only found two speci- 

 mens under d^'bris on the Potomac 

 Flats, and dlsjxir, on tlie hills across 

 the Free Bridge. 



