46 



PROCEEDINGS OF THE XATTOyAL .VUSEU}f. 



ECOLOGICAL NOTES— C'ontinuea. 



Pallodi's jxtllidiis, in UyA(hU)oh,ii\mud-ant. Drijojix, under stoue? and dobris in run- 



Ci/chntiiinn (i(Iiit<ln!<, in fungus. ning water. 



Q/bocepJuilits iiigrilnlus, on twigs of trees. Ehni/i, under stones and moss in running 



Cri/ptarcha and Ips. Tlie species of both 



genera found on sap. 

 Pltyophagus cephalotes, one specimen on a 



fence, south of the Treasury. 

 Rliizopliagnx, on mold under bark. 



LATHRIDII1).E. 



Holop(tr(i})ierux hinzi'i, one specimen 



found under l)ark of an old hickory 



tree. 

 LatltritJiiis liratiis, very conunon under 



debris. 

 Enicmus and Cuninumus, found on molds. 

 Corticarki and Melanophthalmus, found l)y 



sifting and beating. 



TROGOSITID.E. 



Nemosoma jxirullelum and ciilimlrinnn, 



jjarasitic on St-olytids. 

 Alindria cjilindrica and teres, on old 



branches. 

 Trogosita vireHcens, very conunon under 



various trees. 

 Tenebrioides mauritanica, in flour and feed 



stores; the other species found under 



bark of trees. 

 Grynocltaris quadriUneata, rare, on tree 



fungi. 

 Lgcoptus villosus, in decaying wood. 

 TJiymalus fulgidxis, on tree fungi. 



MOXOTOMID^. 



Monolonia, under decaying weeds. 

 Ifeupcrnlnnrvx, Eurujis, and Badridlum, 

 under bark of trees. 



BYRRHID.E. 



Xnmdcndnm wiicolor, sap of trees. 

 Byrrhus murinus, in moss. 

 Syncalypta sirigosa, sifted from moss. 

 Limnidius, along the edge of the river. 



PARNID^. 



Psephcnus leconte.i, under stones in run- 

 ning water. 



Lntrodiiis liileiis, two specimens swept 

 along the river. 



creeks. 

 Steiidrnis, Macronydiux, and Ancyronyx, 

 like Elm is. 



HETEROCERID.E. 



Hi'lerocerus. All the sjiecies occur in 

 mud and sand banks. 



DASCYLLID.E. 



Eiirypagoii niger and californicug, on 



bushes. 

 Odonlonyx and Anclujlavsus, in swampy 



places. 

 Ptiloductyla xerricoUis, on bushes and low 



plants. 

 Eucinetus, sifted from moldy leaves. 

 Ectopria nervosa, on plants. 

 Prionocyphon, Helodes, Sci/rtcs, andCyplton. 



All the species of these genera live on 



plants in swampy places. 



RHIPICERID.E. 



Zenoa picea, uniler bark of trees. 

 Sandalus, occasionally found. 



ELATERID.E. 



Melasis pectinicoi-nis, found boring in dead 



oak. 

 Tharops ntficornis, boring in felled trees. 

 Dcltometopus, on bushes, common. 

 Dro)n,rolus, beating from dead branches. 

 Fornax, like Dromxolus, but rare. 

 Adelothyreus dejeanii, one specimen. 

 Mkrorhagus, all on dead branches. 

 Hypoadus, like Microrhagus. 

 Adeloccra, all under loose bark. 

 MerisUins scohunda, one specimen in a 



sandy place near Rock Creek. 

 Chalcolepidius vlridipiUs, on fences and 



trees. 

 Alaus oculatus, under bark of various trees; 



myops, under bark of pine trees. 

 Hemirhipus fascicularis, on fences and 



trees. 

 Cardiopliorus conrexus and gagates, beat- 

 ing from trees and bushes; cardisce, on 



sandy places. 



