LACHNOSTEKNA. 187 



3. Lachnosterna tridens. 



Oblonga ( $ ), postice dilatata, castanea, breviter, apud frontem et thoracem altius, birsuta, tborace sat dense 

 et grosse, elytris subtilissime et dense, punctatis ; clypeo mediocri transversim qnadrato, angulis rotundatis, 

 margine altius reflexo medio depresso et sinuato, fronte paullo convexa, confluenter grosse punctata, occipite 

 lgevi ; tborace medio valde dilatato, angulis omnibus obtusis sat distinctis, margine crenato. Antennse 

 lO-articulatse, articulis 3°-5 m paullo elongatis gradatim decrescentibus, 6° et 7° brevibus. 



2 . Pygidium parum convexum, setifero-punctulatum, ante apicem unituberculatum, sulcato-marginatum. 

 Venter segmento 6° magno, convexo. Ungues tridentati, dilatatione basali apice acute dentata, dentibus 

 mediano et apicali gradatim longioribus, et omnes sequaliter approximatis. 



Long. 17-18 millim. 



Hab. Mexico, Capulalpam, Peras (Salle). 



Two examples, both females. This is the only species known to me in which the 

 claws of all the feet have equidistant and similarly-formed acute teeth, differing only in 

 their gradually increased length ; the basal tooth is a prolongation of the apical angle 

 of the long and broad basal dilatation. 



The species is evidently closely allied to L. heteronycha. 



4. Lachnosterna piceola. (Tab. X. fig. .20, <? .) 



Elongato-ovata, piceo-nigra, elytris paullo rufioribus, supra glabra, nitida. fronte thoracisque margine antico 

 parce longe fulvo-setosis ; capite grosse, fronte (decliva) confluenter, punctato, occipite transversim obtuso 

 elevato ; clypeo parvo, transverso, utrinque rotundato, margine antico angulatim sinuato et parum reflexo ; 

 tborace relative parvo, medio valde dilatato, margine remote crenato, supra disperse sat grosse punctato, 

 angulis posticis acutis, anticis obtusis; elytris sat dense punctulatis, costa interiore obliqua, parum 

 perspicua; pectore fulvo-villoso. Antennse lO-articulatae, articulis 3°-7 m subsequalibus. 

 S . Pygidium convexum, glabrum, sequaliter punctatum, margine apicali reflexo et subtus borizontaliter 

 continuato. Venter medio convexus, politus, lasvis, vix medio canaliculatus, segmento 5° apice depresso, 

 punctulato, 6° medio concavo ibique punctulato. Calcaria postica elongata, libera. Ungues apice sat 

 anguste fissi, dente inferiore crassiore breviore curvato deflexo acuto ; basi paullo rotundato-dilatata. 

 Antennarum clava mediocris, articulis 3°-7 m conjunctis fere aequalis. 

 $ . Pygidium glabrum, punctatum, basi convexum, apice planum, margine apicali subacuminato valde reflexo et 

 subtus borizontaliter continuatum. Venter convexus, lsevis, suturis deletis, lateribus et segmento 5° punc- 

 tulatis, segmento 6° convexo parciter grosse punctato. Calcaria postica sicut in <5 , sed inferiora, apice 

 obtuso. Ungues valde curvati, apice latius fissi, dente inferiore submediano. Tborax antice crasse 

 marginatus, sulculo profundo. 

 Long. 14-15 millim. 



Hab. Guatemala, near the city, altitude 5000 feet (Salviri). Two examples only. 



5. Lachnosterna scabrifrons. (Tab. X. fig. 21, $ .) 



Elongato-ovata, nigra, nitida, glabra (elytris, pedibus antennisque interdum piceo-rufis), ventro piceo-rufo : clypeo 

 transverso, lateribus late rotundatis, margine vix reflexo antice medio angulatim sinuato, grossissime 

 fronteque adhuc grossius subconfluenter punctatis ; tborace brevi, medio valde dilatato, distanter crenato, 

 angulis posticis acutis, anticis obtusis, supra sparsissime subgrosse punctato, margine anteriore incrassato ; 

 scutello lasvi ; elytris ( $ ) postice dilatatis, ruguloso-punctulatis ; antennis articulis 3°-6 m subelongato- 

 ovatis. 

 $ . Pygidium basi convexum, apice depressum, margine apicali incrassato-reflexo ; glabrum, disperse punctatum. 

 Antennarum clava parva. Ungues dilatati ; basi dentati, dente inferiore elongato acuto deflexo ab apice 

 sat distanti. 



Long. 16 millim. 



2BB2 



