222 F AM FLY TV. DYTTSCTD.T:. 



X. iLYBirs Er. 1882. (Gr.. "mud + life.") 



Oblong, convex black or metallic beetles of medium size, having 

 the thorax margined and the prosternal spine compressed and 

 acute. The males have the front and middle tarsi compre?;sed. 

 thickly fringed beneath, the claws e(|ual. thp anal segment often 

 carinate; female with anal segment omarginate. The upper sur- 

 face, when viewed WMth a lens, is seen to be finely reticulate, while 

 beneath they are finely strigose. On the sides of the elytra are two 

 small pale spots, one of which is sul^apical. 



Two species have been taken in Indiana while three others may 

 occur. 



KEY TO INDIANA SPECIES OF IT-YBirS. 



a. Hind tarsi of males with the joints margined iit tlic (inter lower eilK^'; 

 all fonr spots of elytra distinct. 

 h. Last ventral sejjment of male acutely carinate; above dark reddish- 

 brown. 429. ir.NARi's. 

 hb. Last ventral of male not carinate, its apical portion with coarse 

 lengthwise strijip; upper surface greenish-bronzed, metallic. 



SUB.'RNEIS. 



tni. Hind tarsi of niales not margined at the lower outer edge. 



c. Last ventral of male carinate; one or both el.ytrnl spots very fiiint. 

 d. Black, slightly bronzed; elytra without reddish marginal strii>e. 



4.30. RicriTrus. 

 dd. More strongl.v bronzed; elyfra witli i-eddish margins. 



FRATEKCir.rs. 



cc. Last Ventral of male not carinate; elytra with margin broadly red 

 from the humeri to be.vond the middle. confisis. 



429 (1385). iLYBius jGNARt;s Lee. Proc. Phil. Acad. Nat. Sci.. 1862. .-)iM. 

 Elongate-oval, not dilated at middle. Dark reddish-brown; margin of 



elytra slightly paler, the front spot linear; legs pieeous. Front tarsal i-laws 

 of male distinctl.v sinuate beneath. Length 8-9.5 mm. 



Shore of Lake Michigan near Pine, Lake f'outity; rare. ]\lay 

 25. Also one specimen marked "Ind." in Wel)ster collection. 



7. siihaneus Erichs.. 1L5 mm. : /. frah rciiJiis Lcc, 10.5 mm., and 

 /. conf)isiis Aube. 11 nnii. in length, ai-e all members of the lioreal 

 fauna which have been tak(Mi in ^licbigan and ]>erha])s occur in 

 northern Indiana. 



430 (1389). iLYBius BiGUTTLLLS Gemi.. Ins. Sp. Nov., 1824, 29. 



Oval, convex, slightly dilated at middle. Antennae and front and mid- 

 dle legs, reddish-brown ; under surface and hind legs pieeous. 

 Length lO-ll mm. (Fig. 111.) 



Lake. Lapoi'tc Starke. A'igo and l^'ountaiti coun- 

 ties; probably throughout tbc State; frequent. April 

 28-October f!. Wlien cauglit willi the fingers it ex- 

 in. udcs from llic under sid(^ a wbile iiiilK'A" sid)staucc. 



