. Classification of the Coleoptera of North America [microform]. Beetles; Beetles; Coléoptères; Coléoptères. 13(5 COLEOPTERA OP NOUTII AMERICA. is entirely wanting; the ventral segments are connate, and the fiixlli is indistinct; the last spiraclo is on the suture between the Itropygidium and lit'th ventral. Sub-Tribe 2.—Diclielonychini. The genus Diehelonycha alone represents this sub-tribe in our fauna, but is universally distributed. It is distinguished t'ruiu va- rious foreign sub-tribes having prominent anterior coxai, distinct labrum, and separate ventral segments, by the ligula connate
. Classification of the Coleoptera of North America [microform]. Beetles; Beetles; Coléoptères; Coléoptères. 13(5 COLEOPTERA OP NOUTII AMERICA. is entirely wanting; the ventral segments are connate, and the fiixlli is indistinct; the last spiraclo is on the suture between the Itropygidium and lit'th ventral. Sub-Tribe 2.—Diclielonychini. The genus Diehelonycha alone represents this sub-tribe in our fauna, but is universally distributed. It is distinguished t'ruiu va- rious foreign sub-tribes having prominent anterior coxai, distinct labrum, and separate ventral segments, by the ligula connate with the nu'utum, the large vertical and deeply cniargiiuite lal*rum, and by the sternum not being prominent. The last spiracle is placed outside of the suture between the propygidium and the iil'tli ventral segment, which are not connate to form a soliil ring. From Macroductylini it differs by the position of the last abdo- minal spiracle; by the claws being chelate, or capable of being folded along the last joint of the tarsi, though they are not usually seen in that position; and by the large, prominent eyes. In Diehelonycha the has a narrow anterior membranous margin, and the claws are equal and cleft at tip. Thoy are elongate hairy insects, usually of metallic color, some- times found iu large numbers ou leaves of trees. Snb-Tribe 3.—Scricini (gonuini). This sub-tribe is also represented in our fauna by a single genus, Serica, of universal distribution. They are oblong, con- vex insects, of a brown color, usually with iridescent reflections; the elytra are indistinctly suleatc; the pygidium is sometimes partly covered by the elytra. It is readily distinguished from all others of this family by the labrnm being connate with the under surface of the clypeus, and therefore indistinct. The fifth ventral segment and the propygidijim are separated by a distinct suture, and the spiracle is placed external to this suture, half way between the anterior and posterior
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