544 INSECTA. 



Trogosita, Olivier. 



Trog oi-if a prox>er, has the antcnnce shorter ttian tlie thorax, tlie mandibh?s shorter th.nn the liead, and the ma\- 

 ill.T with a sinj,'-le lobe. 



Trogosifa manritainca, Linn., a tlat beetle, fuur lines loni,^ of a pitchy black colour, found in nuts, bread, ana in 

 tlie bark of trees ; its lan^i, known in Provence under the name of the Cadelle, attacks ^N'ain. 



Pros/omis; Latr. {M<-ga(jiiafhits, Me^.), has the mandibles very lon<,% and two lobes to tlie maxilhe ; the body is 

 Inii;^ and narrow. Trogos mandibularis, [a continental species]. 



Va.isan<lfn, Dalni., has the antenna^ nrarly as Ion;;; as the body, with tlie ele\ en th Joint alone of tlie antenna:- cn- 

 lar^-ed, in form of a rever.sed triaiii^lc. [Exotic species, lately nionoj,^fa].hed by fVlr. Newman. J 



THE THIRD FAMILY OF THE COLEOPTEUA TETRAMEUA,— 

 The Platysoma, — 

 Approaches the last in respect to its internal anatomy, entire tar^i, and haliits ; i)ut tlicantonnoi arc of 

 equal thickness, or sleurlcred at the tips ; the mandibles are always oxposcJ ; the jialpi short, body 

 depressed, and thorax nearly stiuare. These insects are found under the bark of trees, and may be 

 nnitcdinto the single gcnns 



Cucujus, Fabricius, — 

 CVc(f//(,v proper, has the antennae shorter than the body in many species, with the basal joint shorter than tbe 

 head. [C. c/avipes, di'pressus, &c. See ray memior on these insects in Zoolog. Journal.] 

 Dendrophagus, Gyll., has the antennae long:er, and cylindrical, with the basal joint lonirer than the head. 

 Uleoiofa, Latr. (Brontes, Fabr.), has similar antennae, but the third joint is as lon^ as the following ; the mandi- 

 bles, in the typical species, are furnished with a Ion;; horn-like appenda;i,-c. 



THE FOURTH FAiMILY OF THE COLEOPTERA TETRAilERA,- 

 The Longicorxes, — 

 Has the three liasal joints of the tarsi furnished beneath with short brushes ; tlie first and second [not 

 tlie second and third, as described by Latreille], being heart-shaped, and the third [not the fourth] 

 deeply Itilobed, with a small nodule, representing a joint, at the base of the terminal joint ; the labium, 

 placi.'d upon a short ti"ansvcrsc inentum, is generally mcndu'anuus, hcart-sliaped, or bilid ; or liorny, and 

 in shape of a very short transverse segment of a ciicle, in others {Paramlra). The antennrc arc fili- 

 form or setaceous, generally at least as long as the body, either simple iu both sexes, or serrated, 

 pectinated or fan-sha[ied in tbe males ; the eyes of the greater number are kidney-shaped, surruuuding 

 the base of the antennae; the tliorax is trapezdYirm or narrowed in front; in those which have the eyes 

 roundeil entire, or scarcely cmarginate ; in whicli case the legs are lung and slender, with tbe tarsi 

 elongated. 



The larv£e, nearly all of which reside in ihe interior of trees, or under the bark, are destitute of feet, 

 or have thcni only very small ; the body is soft, whitish, thickest in front, Avith the head scaly, and 

 furnished with robust mandibles, the other parts nnt lielng prominent. Tiicy do much injury to trees, 

 especially those of large size, piercing them very deeply, or forming burrows in them. (See the memoir 

 of Lansdown fiuilding, in the 13tli vol. of the Li/tno'a/i Trnnmctions). Others devom- the roots of 

 plants ; the females have the abdomen terminated l)y a tubular and horny oviduct. Tliese insects 

 produce a slight sharp sound, by the friction of the peduncle of the base of the abdomen against the 

 inner recess of the thorax, wlicn they alternately cause it to enter and withdraw it. 



In the system of Linnanis, these insects form the genera Ceramhijr, Lrplnra, AecgdaJex, \\\\\q\\ 

 Geotfroy, Fabricius, and other naturalists have endeavoured to arrange and simplify by the transposition 

 of species, or by establishing other generic groups. From the immense quantity of species discovered 

 sinre the days of Linna.'us, and the insufliciency of the characters assigned to these genera, a complete 

 revision of the family had Ijccome necessary, [which, since the publication of tbe last edition of 

 *:his work, has been effected liy 'Aai'vAlQ, m i\\G. Annnles de In Socirfe Enloii'iologique de France, in 

 wdiich a series of long rnenioirs has been published by this author, containing numerous new genera, 

 the munber "f which has been greatly augmented by I\lcssrs. Hope and >^ewn)au, in recent memoirs 

 published in tliis country]. 



''A'e divide the Longicornes into two primary sections. 



The Hrst section has the eyes either deeply notcbed or crescent-shaped, or long and narrow: the 



