The fourth tribe, that of the CEdemerites, is connected with the 

 third by several characters, such as having the antennae inserted near 

 the eyes, and their origin exposed, the mandibles bifid at the end, the 

 penultimate joint of the tarsi bilobate, and the maxillary palpi termi- 

 nated by a larger and securiform joint ; but if we except the Nothi, 

 approximated by the form and breadth of the thorax, and by some other 

 characters, to certain Heteromera of the preceding tribe, and yet dis- 

 tinguished from them by their strongly inflated posterior thighs, and 

 their bicleft tarsial hooks, the CEdemerites present a union of charac- 

 ters which will not allow us to confound them with the other Hetero- 

 mera. The body is elongated, narrow, almost linear, and the head 

 and thorax are somewhat narrower than the abdomen. The antcnnoe 

 ai*e longer than the two latter, serrated in some — Calopus — filiform 

 or setaceous, and composed of long and almost cylindricRl joints in 

 the others ; the anterior extremity of the head is more or less pro- 

 longed into a little snout, and somewhat narrowed behind ; the eyes 

 are proportionally more elevated than in the preceding Heteromera. 

 The thorax is at least as long as it is broad, almost square, or nearly 

 cylindrical, and slightly narrowed behind ; the elytra are linear or 

 subulate posteriorly, and frequently flexible. These Insects are allied 

 to Telephorus and Zonitis. 



M. Leon Dufour has discovered in the CEdemerites two very sim- 

 ple, flexuous, and floating salivary vessels *, as well as a paunch 

 formed by a lateral crop, furnished with a neck or pedicle. They 

 are the only Coleoptera in which he has observed it. These Insects 

 are found on flowers or trees. Their metamorphoses are unknown. 



These Hetoromera will be comprised in a single genus, the 



CEdemera, Oliv. 

 Here, where the antennae are always short, inserted into an emargi- 

 nation of the eyes, and simple, the posterior thighs are inflated, at 

 least in one of the sexes^ the thorax is as wide as the base of the ab- 

 domen, and wider than the head; the hooks of the tarsi are bifid. 



NoTHUs, ZiegL Oliv. — Osphya, lllig. — Dryops, Schoenh. 

 Where the maxillary palpi are terminated by a large, securiform 



* The Mordellones present the same character. In a more natural series it 

 ■would perhaps be necessary to place the Horiw, which also have the posterior thighs 

 inflated, immediately after Zonitis and Sitaris, then pass to the CEdemerites and 

 Mordellones, and terminate the Heteromera with the Notoxi or Anfhicus of Fabri- 

 cius, Insects evidently connected with the Mordellones by the Scraptiae. In my 

 Gener. Crust, et Insect., I have placed the CEdemerites at the end of the same sec- 

 tion. The Rhsebi of M. Fischer, although tetramerous, are allied in many respects 

 to the Nothi and CEdemerse. The Xylophili, also tetramerous, are however closely 

 related to the Notoxi. 



