TIIK METALliKl \V( »()l>-l'.OKlN(i l!i:i'7l'I,i;S. 79;) 



Tribe III. AfASTOGENINI. 



'I'liis tribe is represented in North Anierie;i by the single <:vmis 



XTT. iNr.vsTodKN'irs Sol. IS.")!. (Or., "iiiotlier i eliiii.") 



It in turn is i-opresented in the eastern United States ]).y one of 

 the smallest Buprestids known, snbeylindrieal in form and liavint;- 

 the antennae inserted in large eavities, narrowing- the front, which 

 does not expand again in front of the cavities as in Agrilus; mouth 

 small, deflexed bnt not applied to the prosternnm ; thorax truncate 

 at base, closely fitting against tlie elytra; prost(M'num truncate be- 

 fore and behind, witli the lateral sutures parallel; seutellum small, 

 ii'iangulai'; legs not contractile, claws broadly toothed. 



1511 (4717). ]\rASTOGENii's SUBCYANEUS Lec, Tr;ms. Amer. I'liil. See.. XI, 

 1S59. 254. 



Snbcyliiulrical. Bluish-black, sbiniiis. Head with a lengthwise groove. 

 Thorax one-half wider than long, slightly wider than elytra, convex, sides 

 strongly rounded; surface, as well as that of elytra, finely and rather 

 sparsely punctate. Elytra with a deep but narrow transverse impression 

 at base, sides parallel. ti]is obtusely rounded. length 2-2.5 mm. 



A single speoimen taken by sweeping on University farm near 

 Mitchell. Lawrence County. May 11. LeConte states that it oc- 

 curs rarely on leaves and flowers in the IMiddle, Southern and Weat- 

 ern States. 



Tribe IV. AGP I LI XI. 



Small-sized, usually slender, though sometimes short, broad and 

 Hat species, having the body narrowed on apical third. Their chief 

 structural characters are tlie front strongly narrowed by the inser- 

 tion of antenna\ then expanded, thus forming two divei-ging lobes; 

 front part of head vertical, the mouth inferior and a]ii)lied to the 

 prosternnm in rep<^se; thoi-ax lobed at base, receiving the convex 

 bases of the elytra; legs contractile; tarsal claws strongly toothed. 

 Six genera are recognized as comiiosing the tribe, four of which are 

 known to be represented in Indiana, while another perhaps occurs. 



KEY TO INDIANA (iKNERA OF AGRIUNI. 



a. Antenna? free, in repose not received in grooves on the under side of 

 thorax. 

 6. Hind tarsi with hrst .ioint searcely elongated. Eii'kistocerxs. 



hb. Hind tarsi with lirst .ioint as long as the three following. 



XIII. Agrilus. 

 fia. Antenna' received in grooves on under side of thorax near the margin. 

 c. Seutellum small; tibire linear. 



