M. H. Jekel — Tentamenta Entomologica. 265 



A second species belonging to this little group has just been 

 described by Mr. Wollaston {Rhlnocyllus lypriformis) in his most 

 valuable paper " On certain Coleoptera from the Island of 8t. 

 Vincent," in Ann. & Mag. Nat. Hist. 1861. 



This increases the interest of the new generic form ; and if we add 

 that the typical species is also found in Egypt, we ascertain the wide 

 range of the genus. 



Balaninus, Germ., Sch. 



This interesting and extensive genus, a great many of the exotic 

 species of which are undescribed in collections, is principally com- 

 posed of two very distinct forms, both represented in the European 

 fauna. 



§ I. (Balaninas, pr. d.) 



The fii'st, or Stirps I. (Genuini) of Sch.*, contains several types of 

 large size, viz. : — 



Sect. 1. Elejphas, Sch., with aberrant species from Europe {^PeJlitus, 

 Sch. ; Mastodon, Jekel, huj. op.) and America, readily distinguished 

 by their more elongate, less conic, and more convex elytra. Nearly 

 all the large and middle-sized North American species belong to this 

 type. 



Sect. 2. Glandium, Marsh (= Venosus, Germ.), with the various 

 forms and sizes of the continental specimens of the so-called Venosus, 

 very likely forming two or three distinct species, forms an inter- 

 mediate type in which the elytra, although much shorter and more 

 conicj^are still convex as in the preceding section. Some of the 

 North American s,pecies belong to this group. 



Sect. 3. Nucum, L.. Sch., and Turhatus, Sch., represent another 

 set of moderately large species, having broader, more conic and 

 flattened elytra. This group, as regards its European species, must 

 be entirely revised ; for, amongst the so-called specimens of Ihcrbatus 

 from all parts of Europe, a good many have, in the construction of 

 the external joints of the funicidus of the antennae, a tendency 

 towards the incrassate and shortened shape declared by Schonherr 

 and all subsequent authors to be peculiar to Nucum. The rostrum, 

 especially in the $ , is also subject to great variations in length, cur- 

 vatui'e, thickness, and sculptiire. These differences, as far as I can 

 judge from the materials I have at hand or have seen — the abnormal 

 specimens being seldom from countries or parts thoroughly and con- 

 tinually investigated by entomologists, but principally from remote 



* To the characters given by Schonherr, add : Unguiculi tarsoriim basi iiitus 

 aut ang\ilatim aut svibdentatim incrassati. 



