204 LAMELLICORNIA. 



coarse ; the punctures moderately close, and lying in very irregular rugae on the thorax, 

 the elytra entirely rugose-punctate ; the scutellum is punctured, with a broad smooth 

 space in the middle. The labrum is thick and deeply and sharply cleft as in L. scissa. 

 The clypeus is transverse quadrate, with a deep notch in the middle of the front margin, 

 and each side from the notch to the base forming a nearly semicircular curve. Both 

 the fore and hind angles of the thorax are acute. The ventral segments 1-4 have 

 on each lateral suture a pencil of long golden-yellow hairs. The following are the 

 sexual differences : — 



<$ . Pygidium vix convexum, valde ineequale, grossissime rugoso-punctatum, glabrum, margine apicali breviter 

 setoso. Venter convexus, medio lsevissimus, lateribus parce setifero-punctulatis ; segmento 5° apice trans- 

 versim depresso, 6° transversim concavo, laavi. Calcaria postica elongata, libera. Ungues basi obtuse 

 dentati, dente inferiore mediano mediocri acuto, a dente basali paullo distanti. Antennarum clava parva. 



$ . Pygidium basi bi- apice uni-tuberosum, medio transverse depressum. Venter convexus, segmento 5° apice 

 eimplici, 6° convexo, apice transverse sulcato. Ungues sicut in <$ . 



Notwithstanding its very different facies, numerous similarities of structure show 

 that this species is closely allied to L. scissa. 

 A male from Tuxtla is figured. 



45. Lachnosterna submetallica. 



L. rugulosm proxime afflnis; differt supra densius et subtilius punctata et brevissime squamulosa. iEneo- vel 

 cuprascenti-fusca, femoribus nitidius seneis ; supra densissime punctulata, in punctis squamula angusta 

 incumbente griseo-ochracea ; clypeo sicut in L. rugulosa ; thoracis disco anteriore maculis duabus politis- 

 simis; scutello dense ruguloso-punctato ; ventris segmentis 2°-4 m ( d $ ) medio callis duobus validis. 

 Antennae in utroque boxu clava parva, articulis 6° et 7° latis, 3°-5 m paullulum elongatis. 



J. Pygidium fere planum, scabrosum, grosse incumbente ochraceo-squamosum, medio callo angusto lasvi. 

 Venter medio leevis, politus ; segmento 5° fere toto ochraceo-squamuloso, apice medio depresso, 6° medio 

 transverse depresso, marginibus parum elevatis. Calcaria postica elongata, libera. Ungues basi lati, 

 dente parvo acuto basali, dente inferiore apud medium sat elongato acuto. 



$ . Pygidium sicut in tf , sed squamis tenuioribus. Venter sicut in tf , segmentis 5° et 6° convexis exceptis. 

 Ungues dente inferiore longitudine denti apicali sequali. 



Long. 16-20 millim. 



Hab. Guatemala, Senahu and Panima in Vera Paz {Champion). 



46. Lachnosterna ? 



Hab. Mexico, Orizaba (SattS). 



A single example of doubtful sex. It appears to represent a distinct species allied 

 to the two preceding. 



VI. Lower tooth of the claws smaller and straight or little inclined, situated near 

 to or below the middle. Base of claw generally without dilatation. 



1. Antennae 10-jointed. 



47. Lachnosterna enryaspis. 



L. scissoe similis, sed valde differt quoad clypeum, ungues etc. Sat anguste oblonga, subnitida, glabra, supra 



