BEETLES OF THE DISTRICT OF COLUMBIA— ULKE. 



49 



ECOLOGICAL NOTES— ( ontiiuied. 



Ennearthron tJioraricornt', like r/.s; j^everal 



undetermined species. 

 Ceracis sallei, like Eunairllirun. 

 Rhipidandruspdriiilodus, in a white fungus 



at the base of trees. 



SPHINDID/E. 



Sphi)ida>< (iiiicricditiis, in fungi growing on 

 timber. 



LVCA^WAi. 



Lucanus I'htjiIiKK, one speeimen said to l)e 

 found in Washington; (hiinti, not rare 

 at eiectrie Ughts. 



1 >()rcus parallelus, in white rotten wood. 



Platycer us and Cerucliux, Vike Dorcns. 



Nicagus olm-urus, on sand l)anks along the 

 Eastern Branch. 



PAHSALID/E. 



Pasi<(tU(.'< cdrmilu.s, l)oring galleries in old 

 stumps and logs. 



SC'ARAB.EID/E. 



CanOioii. hvrix and vigilant, conmion in 

 dung; riridis, under old leaves. 



tlucridiuin hixteroides, in decaying fungi. 



Coprh, all in dung. 



Fhauniix carnifex, in human excrements. 



Onlhophdgus hecale, tuberctdifrons, and 

 poinnylvanlcus, in dung; janux and vari- 

 eties, in decaying toadstools and fungi. 



Aphodius. All species of this genus live 

 in various kinds of dung; only serral 

 is found under old leaves, and (ihlnngiix 

 in hollow trees. 



Dialytes tnincatus and sfrldhdns, in horse 

 manure. 



Ativiiiiis, all species found in rich grounds; 

 jigni'dtor, found at electric light. 



JiJnjsf^einus scaber, under stones in wet 

 sandy places. 



Pleurojdujrdx cn.siis, in rich soil; i-rii(r(dls, 

 one specimen. 



Psdmmodias Inlerriiplux, iu sandy places 

 along the river; irgidHoides, one speci- 

 men. 



-Egi(d'n(, one undescribed specimen. 



Ochodieus musculus, one specimen. 



Bolboceniy:, found occasionally in roads. 



Odoriticus cornigerna, like r>o!bnc('n(s. 



Proc. N. M. vol. XXV— 0-2 — 



(li'dtrnpi-x, all iu lotten fungi and dung; 

 hornii, under the stem of a toadsto(jl, 

 also at electric lights. 



Clipoius djihodioides, in rotten wood. 



Trox, all the species are found in dried 

 carcasses of mammals and birds, also at 

 electric lights. 



Ildplid, found flying on sandy soil. 



Dlrheldni/c}td, on bushes. 



Serica vesperihia, very conunon under 

 stones and logs in spring; iricolor and 

 .^ericea on bushes; trorifonnh, rare. 



Mdcradaciylus subHpinoKn.s, the well-known 

 rose chafer. 



D'lplotaxin, the species are all found under 

 stones and on bushes. 



Luchnoaterna. There are 26 species in the 

 District. All are found on trees at 

 night, or attracted by lights. 



Anomala marginaia, on grapevine ; the 

 others all on pine. 



Strigodenuu, the two species are on blos- 

 soms of riiba.^. 



rclldiiotd piiiirtdid, ci.nnmon on grape- 

 vine. 



CuldljM lunigerd, on cottonwood trees. 



('ydocephaki, flying after dusk. 



Chalepua tracliypyguif, on muddy grounds 

 along the river, and abundant at elec- 

 tric lights. 



Ligyrus, in moist sandy places. 



Aphonus, in old decayed stump of trees. 



Xyloryrtes salynts, larva very abundant 

 under stone.s in pastures. 



Strati-gKK di)(:riis, in rotten wood. 



Dyiidxt^'s tityiix in rotten wood, not com- 

 mon. 



FhileiirKs ndgiix, one specimen dug out 

 from the ground. 



AUurliliid nitida, extremely abundant in 

 spring. 



EiijjJiorid iiidd, very abundant in early 

 spring; (ircdld in sandy roads; herbaceo 

 on bushes; Jiilgidd and si'pnk-firdlis on 

 blossoms. 



Cremastochiluy: leucost ictus, one specimen 

 occurred at Odenton, Maryland. All 

 the others are found in nests of various 

 ants, also flying on roads. 



OsmoderuM ereuilcoki and scdbni, in rotten 

 trees. 



