532 INSECTA 



evidently more dilated tlian the followinp:. INIegerle and Dejean liave cut this iip into several other sab;2:cncra, 

 without, however, characterizing^ them. Such are their genera, — 



Opa(n/iii,v (in which the males have the four basal joints of the anterior tarsi of equal breadth, composed of 

 American species); Dc/idarns, Me^., in which the basp.l, and especially the fourth joint, are evidently narrower 

 than the interveningjoints, the tibiae loni; and narrow, but little dilated at the tip ; HeVtophilus, Dej., in which the 

 sides of the thorax arc suddenly narrowed near the posterior anj^Ies ; Eitn/tiotus, K., with the thorax larg:e, 

 scarcely broader than long:, and stron;;ly marg;incd ; Isocerus, Me^ , with the body distinctly more convex above, 

 and the thorax transverse, and Pedinas proper, in which the males have the three basal joints of the two anterior 

 tarsi always very much dilated, diminishing ;?radually in breadth, the fourth being^ very small ; the hind thig^hs 

 of the same individual are concave and silky beneath. [We possess a species of this e;enus found on the sea coast, 

 of small size and black colour, — P. mariliiniis.] 



Blapstinus, Dej. (\vith the front margin of the head notched,) and 



Plat^sceliSf Latr. {with the head entire in front), have the four anterior tarsi of the males equally dilated. 



We are now arrived at Mclasomata furnished with wings, having the body generallv oval or oblong, 

 depressed, or but sliglitly elevated, witli the thorax square or trapeziforni, as broad beliind as tlic ab- 

 domen ; tbr palpi are largest at the extremity ; the last joint of the maxillary palpi is liatchet-^baited ; 

 the mentuni is but little extended in ))readtli, luavinc^ tlie liase of the liiaxiUffi exposed. 



These I\Ielasomata compose the tiiird and last tribe, that of the Tencbrionitcii, formed of the single 

 genus 



Ti:NEnRio, — 

 Such as it was at first formed by Fabricius, to which we reunite those which he has named Opatrwn 

 and Orthocerus. They serve as types for the same number of peculiar sections. 



1. Those with the body oval, the thorax nearly trapezoid, curved at the sides or semi-oval, broader 

 l)ehind than the abdomen ; the maxillary palpi terminated by a hatchet-shaped joint. 



Cnipticus, Latr., has the body convex and polished above, with the head exposed ; the antennas are nearly as long 

 as the thorax ; the tibias are \ow% and narrow. Type, Pediuus glaber^ Latr. [a species found in En<^land on the sea 

 coast, of a small size and black colour]. 



Opatrum, Fabr., has the body generally less elevated and often depressed, the head and eyes received into the 

 deep prothoracic cavity ; the antcMinai' are sliortLT tluin the thorax, the elytra arc rough, the fore tibin^ are broad in 

 some. 



tSiJpha snliuUj.sa, Liim., about one third of an inch loni,^, of an ashy !:;"rey colour. Very common throuLchont 

 lun-npe [iuchuling i'^uL^laud] in sandy lilaces, appc-aiino; in tin.' rir-^t fiue days of the spring. 



2. Those with tlie body narrow and elongated, nrurly of the same width or wider behind, with 

 the thorax nearly square, and at least as long as wide, the atiteiina; forming a thick mass. 



Corticus, Dej. (having cylindric antenna'), and 



Orffiocenis, Latr, (with spindle-shaped antennre), ha\e these organs thick, prrfohated, hairy, and apparently only 

 10-joiuted ; llispa 7>nifica, Linn. [The type of the last subgeinis is found in sand pits in various p:irts of Kujiland.] 



The antenna' of tlie others are of the ordinary thickness;, not visibly perfoliated, and with ten distinct juints. 



ChiroscdiSy Lam., with the fore-tibii-^ ]i;ilmated. Cli. hiffncslra, Lnni., [a hu-^e African insect]. 



Toiicnm, Latr., with simple fore-tibia-, and with tlie head ti'iangular, and thorax nearly square. [Exotic species 

 of moderate size.] 



Boros, Hcrlist., with simple fore tibia', and with the heinl oval, and thorax sumcwhat i'\ al. 



3. Those with tlie body hmg and narrow, the thorax nearly sipiare, the antenna? of the ordinary 

 size, and not suddcidy terminated by a clul) ; the thiglis of the two fure-legs are thick, and the tilii;c 

 bent and narrow. 



Calcar, Dej., has the thorax obloirj:, the body linear, of equal breadth throui;iinut, the front of the head imtrhed. 



Upii-y Fab., has the thorax uhloni^, tlic body narrow hat not linear, the front Lif the head straight, f. ccnujt- 

 Ooides, Fabr. [a German species]. 



TenebriOy Linn., Fahr., differs only from Upis in having" the thorax bi'oader than lon^'. 



Tciii'lirio maUtor, Linn., about two-thirds of an inch long, of a black brown colour, is of very common occurrence 

 [in lMi;,^IandJ, IieinLi; found, especially in the evcnini;', in unfrequented jiartsof houses, bake-houses, 

 aud coni-nnMs, ^c. Its hirva [known under tin- name of the i\leal-\vorm] is long;, cylindric, and 

 of an oclu'i; eolour, scaly, aiid ver'y smooth ; it li\'es in barley an(t \^■lleat [hiscuits, IIlmu", &c.] 

 and is given to Nightingales. Tlie Brazilian, T. iirandis, is found under the bark of trees, and 

 discharges from the anus a cau^;tic fluid to the distance of a foot. 



Ueterotar.siif:, Latr,, has the jienidtirnate joint of all the tarsi minute, and received in a canai 

 of the preceding joint. 



[The student will find the descri|itions i.ii many new genera in this and the two preceding- sectJoiT; 

 of Melasonia, descrilied by M. Solier in the Annales de la Soc'icfc Entomologlque de France, and y. ^ 

 by M. Guerin in his Magafiin de Zoologie, and in the Voyage de la Coqiiille.] 



