Characters of Derelaphrus. ccvii 



on either side of it, behind the middle) and scutellum, giving it a character which 

 it is impossible, even prima facie, to mistake. 



T. V. WOLLASTON. 



Art. XXXI. — Revision of the Characters of Deretaphras and Descriptions of Tito 

 New Species. By T. Vernon Wollaston, Esq., M.A., F.L.S., and 

 Edward Newman. 



Order — Coleoptera. 



Section — Necrophaga. 



Family — Colydiad^e. 



Genus — Deretaphrus, Newm. 



Corpus angusto-elongatum, parallelling subcylindricum : prothorace subcordato, 

 angulis anticis deorsum leviter productis : mesothorace cylindrico, superne 

 subobservando, scutello rotundato : elytris (praesertiui circa humeros) longi- 

 tudinaliter costalis, necnon profunde sculpturatis : abdomine e segmentis 

 ventralibus sex composito. Antennae prothorace breviores crassae, articulo 

 lmo valde robusto subgloboso intus (ut in gen. Bothrideres) inflato, 2do et 

 3tio vix brevioribus (illo ad basin flexuoso), inde ad 8vum transversis brevi- 

 bus (longitudine latitudineque vix crescentibus), reliquis poculiformibus, 

 clavam intus leviter triserrato-ampliatam efficientibus), 9no et lOmo latis, 

 ultimo minore angustiore ad apicem valde truncato). Labrum sub fronte 

 fere opertum, submembranaceum, transversum, ad latera necnon ad angu- 

 los anticos rotundatum, apice fere integrum sed pilis longissimis introrsum 

 vergentibus densissime ciliatum. Mandibular niagnae corneae robustissimae 

 crassae glabrae, ad apicem obtusae sed fortiter bidentatae, margine interno 

 subintegro et membrana haud instructo, basin versus externam profunde 

 sinuatae. Maxillae bilobae, valde pubescentes : lobo externo latiusculo ; 

 interno huic angustiore et paullo breviore, ad apicem ipsum minutissime 

 uncinato. Palpi subfiliformes, articulo ultimo subfusiformi elongato. 

 Mentum amplissimum, corneum, transversum (antice versus utrumque 

 latus profunde fissum). Ligula parva angustissima, valde pilosa, ad apicem 

 tenuissime membranacea rotundata ac leviter dilatata. Pedes validi : tilths 

 compressis et apicem versus dilatatis, ad apicem externum in spinam ex- 

 stantem productis, ad internum calcariis duobus inaequalibus (nisi fallor 

 mobilibus, necnon ad basin articuli tarsorum primi affixis) armatis (calcari 

 superiore in anticis, inferiore in posterioribus, majore et leviter incurvo) : 



