222 FAMILY IT. DYTTSOID^. 



X. Iltbius Er. 1882. (Gr., "mud + life.") 

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

 the thorax margined and the prosternal spine compressed and 

 acute. The males have the front and middle tarsi compressed, 

 thickly fringed beneath, the claws equal, the anal segment often 

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

 face, when viewed with 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 subapieal. 



Two specias have been taken in Indiana M'hWe three others may 

 occur. 



KEY TO INDIANA SPECIES OF ILYBIU.'^. 



a. Hind tarsi of males with the joints margined at the outer lower edge; 

 all four spots of elytra distinct. 

 6. Last ventral segment of male acutely carinate; above dark reddish- 

 brown. 429. IGNAKUS. 

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

 lengthwise strife; upper surface greenish-bronzed, metallic. 



SUB/ENEr.S. 



na. Hind tarsi of males not margined at the lower outer edge. 



c. Last ventral of male carinate; one or both el.ytral spots very faint. 

 d. Black, sli.ghtly bronzed ; elytr;i without reddish marginal stripe. 



430. BTGITTTLU.S. 



dd. More strongly bronzed ; elytra with reddish margins. 



FBATEHCULVS. 



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

 from the humeri to beyond the middle. confusis. 



429 (1385). iLYBius IGNAEUS Lee, Proc. Phil. Acad. Nat. Sci., 1862, .521. 

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



elytra slightly paler, the front spot linear ; legs piceous. Front tarsal claws 

 of male distinctly sinuate beneath. Length 8-9.5 mm. 



Shore of Lake Michigan near Pine, Lake County; rare, ^iay 

 25. Also one specimen marked "Ind." in Webster collection. 



I. submneus Brichs., 11.5 mm. : /. fi-alrnnlus Lee, 10.5 mm., and 

 /. confusiis Aube. 11 mm. in length, are all members of the boreal 

 fauna which have been taken in i\richigan and perhaps occur in 

 northern Indiana. 



430 (1389). iLYBius BiGriTULus Germ.. Ins. Sp. Nov.. 1824, 'J^). 



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

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

 T,«ngth 10-13 mm. (Fig. 111.) 



Lake, Laportc Starke, ^'jgo and Fountain coun- 

 ties; probably throughout the State: fveciuent. April 

 2:V()ctober 6. When caught witli the fingers it ex- 

 Fig, in. udes from the under side a white niilkv substance. 



