CERAMBYCIDAE. 331 



Ungues simple (except the outer one of front and middle 



tarsi in certain ). SAPERDINI. 



Ungues cleft or appendiculate. PHYTOECIINI. 



III. Humeral angles distinct, wings perfect, elytra abbreviated; front 



tibia; not sulcate, claws divaricate. METHIOIDES. 



Front coxal cavities augulated, widely open behind ; middle coxal 

 cavities open externally ; front short, eyes very large, coarsely 

 granulated ; oral organs atrophied. METHIINI. 



Tribe I. DORCADHLM. 



This tribe, represented by numerous species in the Mediterra- 

 nean region of the Eastern continent, has but two representatives, 

 Plectrura and Ipochus, in our fauna; the former, a brownish 

 insect with rows of shining tubercles on the elytra, which at the 

 apex are prolonged into acute serrated cusps ; the sides of the 

 prothorax are armed and serrate ; it is found in Oregon, Van- 

 couver, and Alaska. Ipochus, a very convex form, clothed 

 sparsely with long erect hair, with bands of white pubescence 

 on the elytra ; the prothorax rounded, not armed ; found in the 

 southern part of California. 



These two genera represent separate groups, the former, 

 Dorcadia, having slender almost pointed palpi, and wide intercoxal 

 process of 1st ventral segment; the latter, Parmense, having the 

 palpi stouter, last joint oval, obliquely truncate, and the inter- 

 coxal process of 1st ventral segment acute. 



The tribe is readily recognized by the absence of wings, the 

 consequently short metasternum, and by the elytra having no 

 humeral angles ; the large quadrate vertical front ; the support 

 of the labrum coriaceous and distinct. The ungues are divari- 

 cate, and the last tarsal joint long. The front coxal cavities are 

 widely angulated, closed behind ; the middle coxal cavities widely 

 open externally, with distinct trochantin. The eyes are coarsely 

 granulate. Habits epigaeal. 



Tribe II. HI ONILEMINI. 



These are large species of black color, rarely (M. albopictum 

 White) varied with whitish pubescence ; the antennae are, how- 

 ever, always annulate. They are found in the interior region of 

 the continent, extending into Texas and Lower California. 



The characters of the tribe are : front large, quadrate vertical, 

 support of labrum not visible ; wings none, metasternum short, 



