] 6 Mr. T, V. Wollaston on the Anobiadse 



elongato-ovato. Labrum subcorneum, postice angustatum, antice 

 lato-anipliatum angulis anticis rotundatis sed per marginem anti- 

 cum rectissime truncatum et ibidem ciliatum. MandibuleB validse, 

 corneae, latissimse, crassse, extus valde truncato - rotundatae, ad 

 apicem acutse integrse, mox intra apicem dente magno lato et infra 

 hunc dente minore obsoletiore instrnctse, inde ad basin rectse baud 

 excavatse. Maxilla bilobse, lobis latiuscubs membranaceis intus 

 longe et dense pubescentibus, interno breviore. Palpi subfiUformes, 

 elongati; maxillares art. 1™° parvo, 2^° longiore crassiore subtri- 

 angulari intus oblique truncate, S'^'" paulo breviore crassiore, 

 ultimo baud latiore valde elongato fusiformi : labiales longissimi, e 

 scapis ligulse connatis surgentes, art. I'"" sat parvo, 2'^° multo majore 

 subtriangulari ad apicem internum valde oblique truncato et ibidem 

 longe piloso, ultimo paulo majore crassiore fusiformi. Mentum 

 basi subcorneum, apicem versus membranaceum, triangulare apice 

 recte truncatum. Ligula longiuscula, membranacea, basi rotundata, 

 apice valde profunde biloba, lobis magnis subdivergentibus pilosis 

 obtusis. Pedes graciles, contractiles : tibiis rectis, gracilibus, ad 

 apicem internum minute calcaratis : tar sis articulis 1™° et 2'^° elon- 

 gatis (boc illo vix breviore), 3*'° 4*°que brevibus, ad apicem internum 

 (prsesertim hoc) leviter productis, ultimo his conjunctis longitudine 

 subsequali, unguiculis simplicibus munito. 



Obs. Genus Xyletino aflBnitate proximum, sed corpora longiore 

 magis cylindrico vestito, capite paulo latiore, protborace postice valde 

 rotundato (minus sinuato), palporum omnium articulo ultimo fusi- 

 formi (nee securiformi), tarsorum articulo secundo longiore (basalis 

 fere longitudine) necnon victu moribusque certe distinctum videtur. 



A v(Wios australis, et fxiiios imitator. (Typus Notiomimus fimicola.) 



The curious-mannered beetle from which the above structural 

 details have been drawn has much the external contour of a 

 Xyletinus, with which indeed, in its antennse, mandibles, maxil- 

 lary lobes and ligula, it is almost coincident. Its rather larger 

 and broader head, however (which is much inflexed, and closely 

 applied to the chest when the insect is in a state of repose), in 

 conjunction with the strictly fusiform terminal joint of all its 

 palpi, and the elongate second articulation of its feet (which is 

 scarcely shorter than the basal one) — not to mention its extra- 

 ordinary habits and other minor characteristics, — will undoubt- 

 edly separate it from that genus. The terminal joint, too, of its 

 tarsi is less abbreviated than is the case with the true Xyletini, 

 being quite as long as the two preceding (short) ones united ; 

 its mentum is more decidedly triangular (though broadly trun- 

 cate at its tip) ; its labial palpi are longer ; its upper lip is con- 

 tracted at its base, wide anteriorly (with the angles rounded), 

 and very straight along its front edge ; and its elytra are some- 

 what shortened behind, leaving more or less of the pygidium 

 uncovered. Its habits, moreover — which, so far as I have hi- 

 therto observed, are purely stercoraceous (the insect infesting 



