ANTHRIBIDAE. 531 



Tribe IV.— XEXORCHESTINI. 



The species of this tribe have lost all appearance of the family, 

 and indeed of Rhynchophora. Those known in our fauna might 

 be readily mistaken for small Cryptocephali ; while the Maderan 

 species figured by AVollaston* seems to resemble in miniature 

 Gibbium. 



The body is oval or ovate, very convex, and quite glabrous. 

 The beak is so short as to be not distinct from the front ; the 

 autennse are inserted upon the front, w^hich is deflexed ; the eyes 

 are small, transverse oval. The first and second joints of the 

 antennas are longer and stouter; 3-7 shorter and thinner, nearly 

 equal; eighth subtriangular, a little wider, 9-11 wider forming a 

 loose club. Prothorax narrowed from the base forwards, ridge 

 entirely basal, flexed at the hind angles, and continuing a short 

 distance along the sides. Scutellum invisible. Elytra not striate. 

 Tarsi with the first joint elongated ; second triangular, emargi- 

 nate; third bilobed; claws slender, not toothed. 



Two genera are thus separated : — 



Upper surface smootli. Xenorchestes. 



Prothorax punctured; elytra with irregular double rows of punctures. 



Euxemis. 



One species of Xenorchestes, and two of Euxenus are found in 

 the Atlantic States. Xenorchestes was first described from 

 Madeira, and is another evidence of the relations between the 

 fauna of North America and that of the Atlantic Islands. 



* Insecta Maderensia, pi. viii. f. 8. The maxilla has a strikingly Ade- 

 phagous form, the inner lobe being curved, acute, and sparsely spinose on 

 the inner edge. 



