40 FAMILY TT. CAHABTD.E. 



Horn. — "Simoptic table of the genus Omophron," in Bull. 

 Brook. Ent. Sou.. I, 187S. i. 



Nine species are known from the United States, of which four 

 have been taken in Indiana, while one other may occur. 



KEY TO INDIANA SPECIES Of OMOPHRON. 



a. Bi-d.-itlly (iv.il. shilling; elytral stn:i; almost entirely obliterated at apex 



and indistinct on side, the intervals flat; median line of thorax 



very faint. 



II. Rows of elytral punctures reaching only to middle; color dark 



ludwn or nearly black, the side margins of thorax and elytra pale. 



LABIATUil. 



Ob. Rows of elytral punctures reaching two-thirds the distance from 

 base to apex; color dark metallic gi-een, pale at sides. 



17. NITIDUM. 



uu. Less l)roadly oval, le.^-s n nvex and less shining; elytral strife reach- 

 ing to very near the apex, distinct on sides, the intervals convex. 

 c. Elytra 14-striate; striiie shallow, indistinct at apex, punctures large, 

 distant. 1^. ROBUsxiii. 



( r. Elytra 1.1-striate; stri.e deep, distinct at apex. 



fl. Thorax with side margin only ])ale, 10. amekicanuji. 



(Jil. Thorax with sides, basal and apical margins pale. 



20. TESSELLATUM. 



0. Idhidtiim Fab. occurs in the '"^Middle and Southern States." 

 and should be looked for in southern Indiana. (.Fig. 27.) 

 17 (71). Omophron NiriDU.M IjCC. Ann. Lye. Xat. Hist.. IV, 1S4S. 447. 



Dark metallic green, shining : thorax and elytra with a narrow, pale 

 margin, that of the elytra with three irregular projections, the first and 

 second of which extend inward to the eighth and sixth strise; the third 

 longer, subquadrate and near the apex. Thorax without punctures on 

 pale margins and at center, coarsely and sparsely punctured near base 

 and apex. Punctures of elytra large, distant. IjCngth ."i-(! mm. 



Lake County: scarce. Taken by A. B. ^Yoleott from the beach 

 of Lake ilichigan near the station of Pine. April 29-;May 28. 

 IS (74). Omophron KOBrsiUM Horn. Trans, .\nier. Ent. Soc. III. 1S70. 7.'i. 



Pale brownish-yellow; elytra with broken green cross-markings; the 

 strijp with coarse distant punctures. Thorax with a narrow green cros,s- 

 band. which extends forward and backward at the middle, and an oval 

 green spcjt each side. Length (;.."i mm. 



Stein collection from southern Indiana. Probably throughout 

 the State, but scarce. Taken by Dury at Cincinnati. 

 19 (7(1). (jMOPiiRON AMERiCANr:N[ Ki'.j., S]iec.. V. is:n. .">s;^. 



Bronzed or greenish-black; head mostly green; thorax and elytra 

 with pale niargiiis. these of the former very narrow. Punctures of elytral 

 stri.-ie rather fine, the intervals strongly convex. Length (i-7 nun. 



