BEETLES QF THE DISTRICT OF COLUMBIA— ULKE. 



45 



ECOLOGICAL NOTES— Continued. 



MYCETOPIIACrlD.E. 



Mi/ci'topJiai/itfi jiitiicldtiix and fle.vnosui^, 

 very common in various fungi; obso- 

 /etuf<, once found in abundance in a 

 white fungus; pluripunctatus, in fungi 

 under moldy bark; bipu-^tulatus, in old 

 tlour barrels, also on moldy bark; pini, 

 under old pine l»ark; mehheimeri, one 

 siieeimen. 



Lil<ir<jiis. All our species are common 

 under decomposing vegetable matter, 

 also under bark. 



Ti/phiea fuiiiaia, like Lit(ir(jns, very com- 

 morb 



BcTginus pumilus, one specimen. 



Miirmechixenus lathridioides, in old horse 

 manure, in autumn. 



I>i]ilocrdu» hrmninix and rudis, old 

 l)ranches infested with fungi. 



DERME8TID.E. 



Hi/lurus nnicolur, commonly found by 

 heating. 



I>i'niu'.'<tefi auiiiiii^!, common under car- 

 casses; lardariiift, common in houses; 

 rnlpinus, under old bones; elongatus, 

 one specimen found under bark. 



Altagenus piceus, abundant, especially in 

 hoiLses; pellio, one specimen; hornii, 

 introduced from Mexico. 



Trocjodcrma and Anthrenns, our common 

 house and cabinet pests, also common 

 outdoors on flowers, especially Spirsea. 



Cri/ptorJiopalum lunnorrlioidale and triste, 

 very abundant ou flowers. 



Apsectus ]dspidnt<, one sjiecimcn. 



Orphilus niger, on flowers, n rare. 



HISTERID^.. 



If'ilulrptd. The two species are not rare 

 under freshly loosened bark of trees. 



Ulster. All our species of the genus Ilixlcr 

 occur in vegetable debris, except the 

 subgenera Platysoma and Ci/listix, the 

 species of which live under bark of 

 deciduous or coniferous trees; Phelister 

 scneomlcans is very rare and seems to 

 have not been found elsewhere. 



Tnhalister marginellm, very rare; only a 

 few specimens have been caught, flying 

 about in early spring. 



Tribaliis atiierlcanus, yuA raiv, under bark 



and in decaying wood. 

 Epierus, like Tribalas. 

 HeLvrins briinnipemm, in nests of Formica 



fusca. 

 EcJdnodes setiger, only one specimen found. 

 Onthophilus alternatus, under fungus or 



vegetable debris. 

 DendropliUns punctulatux, not rare under 



bark of old trees. 

 I'nromaliix. Our species are more or less 



abundant under old bark of trees. 

 Anaplens marginatum, under old boards 



and sticks on the banks of the river. 

 Saprinus. Of these STpec\esfraternus,fitchii, 



and patruelis are found in sand near the 



river; all the others occur in various 



kinds of dung. 

 Flegaderns traiisrersus, in galleries of Tomt- 



cm under pine bark. 

 Teretrhis, Bacanius, and Acriius. All spe- 

 cies of these genera live under bark of 



trees. 



NITIDULIDyE. 



Brachypterus urlicse, on nettles. 



Cercus abdominalis, on flowers of Sambucns 

 niger. 



Carpophilus hemipterus, found in grocery 

 stores; the others live on blossoms and 

 sap of trees. 



.Colastus. All on exuding saji of trees. 



Conotelm obscurns, on flowers of Convolvu- 

 lus; mexicanus is introduced into green- 

 houses. 



Epnrwa peltoides, rare, on sajx^f trees; all 

 the others are found under old leaves. 



NitiduUi, common under dry carcass. 



Stelidota, under dry leaves. 



Proinetopia 6-maculata, on sap of trees, 

 common. 



PItenolia grossa, in fungi, common. 



Omosita colon, under dry animal matter, 

 abundant. 



A)irphotis idkei, in ants' nests. 



Soronia undulata and substriato, on sap of 

 trees, common. 



Thalycra eoncolor, one specimen. 



I'oradhis helroJii.'^, in fji/eoperdoi), very 

 common. 



Oxymeiiius, in fungi. 



Amphicrossus cUiaius, on sap of trees. 



