Dr. Afzelius'i Olfervations on the Genus Pdufus. 2^9 



The Head is uncommonly fmall and without a horn, its annular 

 bafe-part higher than the foremoft: ; the clypens bipartite, and the 

 jugular triangle minute. 



The Eyes, being as dark as the furrounding parts, cannot be dii- 

 covered but by a large magnifier, and then they appear to be of n 

 water-colour. The angles of the brim of the focket areiarge, the 

 hinder one being raifed to the height of the eye. 



The Pivots of the antenna are black, very bright, and eafily taken 

 for eyes. The under-joint is furnifhed with a wart on the inner 

 margin of the top, covered with papillary or cartilaginous hairs. 

 The upper-joint, or the clava, is dotted, much greater than the head, 

 and of the (hape of an oblong fpheroid, being in front rounded and 

 comprefTed with the carina railed into a (harp edge, provided on the 

 vertex with four tubercles fet in a row and tipped with hairs, and 

 elongated behind into an obtufe tube, laterally comprefTed, above 

 deprefTed, and underneath having a knob, which, in moving, touches 

 the bundle of hairs on the top of the under-joint. The pedicle is 

 long and crooked, its upper part being broader, comprefTed, and 

 keeled in front. 



The interior Palpi are of a lanceolated-oblong fhape, and furnifhed 

 with very minute hinges. 



The Mand'ibuhe have fmall hinges, and the inferior fheath much- 

 larger than the fuperior. 



The Thorax is broader than the head and very uneven, the two 

 parts being entirely feparated by a tranfverfely furrounding furrow, 

 the foremoft above and on the fides elevated to a fharp edge like a 

 collar, and the hinder one cut out in the middle into a cavity, which, 

 obtufe behind, and dilatated and deepened before, is encompailed 

 en the fides with diverging and outwardly declining lobes, being 



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