40 FAAttLY If. ('AI{.\I!II).K. 



Horn. — " Sjinopf ic t;il)l(» of tlic "jciiiis C)ino|)livon." in V>u\\. 

 IJrook. Kill. Sue. I, 1S7S. 4. 



Nine species jire known i'roin the I'liited States, of which four 

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



KKY TO I.\I)1.\.\A SriXTKS OF OMOPHKON. 



((. lifoadl.v oval, sliiniui;-; elytral stri;e alinest entirely obi it era ted at apex 



and indistinct on side, tlie intervals Hat; median line of tlKjrax 



very faint. 



t>. Rows of elylral inim-lnres I'eacliin.^ only to middle; color dark 



hrown or neai'ly black, tlie side niarii:ins of thorax and elytra pale. 



LABIATUM. 



hh. Rows of elytral jinnrtures I'eaching two-thirds the distance from 

 base to apex ; color dark metallic green, pale at sides. 



17. NITIDUM. 



iKi. Less broadly oval, less convex and less shining; elytral striie reach- 

 ing to very ne;ir llu- apex, distinct on sides, the intervals convex, 

 r. Elytra 14-striate; stria- shallow, indistinct at apex, pnnctures large, 

 distant. is. robustum. 



cc. Elytra IG-striate; stria' deep, distinct at apex. 



tl. Thorax with side margin only pale. 1!». ammucanum. 



(hi. Thorax with sides, l):isal and .-ipical margins pale. 



'20. TESSELI.ATUM. 



O. lithiitluiii Fab. occurs in the "IMiddle and Sottthern States," 

 and shoidd lie h)oked for in southern Indiana. (Fig. 27.) 



17 (71). OxioiMiKOX xMTui M Ecc, Ann. Eye. Xat. Hist., lY, 1848, 447. 



Dark metallic gieen. sliining; tin. rax and elytra with a narrow, pah- 

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

 second of which extend jnward to the eigldh and sixth stria:: the third 

 longer, sulxpiadrate ar.d near the apex. Thorax without punctures on 

 l)ale margins and at Center, coarsely and sparsely punctured near base 

 and apex. I'unctures of elytra large, distant. Eength 5-0 nun. 



Lake County; scarce. Taken hy A. 1>. Woleott from the bea(4i 

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



18 (74). Ojioi'HRON KOP.rsTUM Horn. Trans. Amer. Ent. Soc., HE 1870, 73. 



I'ale brownish-yellow; elytra with broken green cross-markings; the 

 stri* with coarse distant punctures. Thorax with a nan-ow green cross- 

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

 green s])ot each side. Eength 6.5 mm. 



Stein collection from southern Indiana. Probably throuohout 

 the State, but scarce. Taken by Dury at (Uncinnati. 

 p.) (7»)). Omopiikon amkruaxtm DeJ., Spec. \. 1831, 583. 



Bronzed or greenish-bla<-k ; head mnslly green; thorax and elytra 

 with pale mai-gin^'. tluse of the f(.i'mei' ve;y narrow. Punctures of elytral 

 stria' rather line, iiie inlervMls si nacMv cdiivex. Eeugtb r. 7 uun. 



