274 Mr. G. J. Arrow on Lamelllcorn Beetles 



Bab. Venezuela : Caraccas. Colombia. 



Tliis species has a very close resemblance to the last, but 

 is relatively broader than that or any other of the species 

 nearly related to it. It is larger than L. amazonicus, and 

 differs from it also in the complete obliteration of the hind 

 angles of the prothorax, the curve of the lateral margin 

 being uniformly continued. The sculpture of the pygidium 

 is also different, about a third of its length from the base 

 being finely rugose. These two species differ from L. maimon, 

 Er., in their more punctured elytra, and froniX. ehenus, Deg., 

 and gi/as, Er., in having the pronotum much more closely 

 punctured. 



Gyclocephala lotiqiceps, Kirsch, seems to me to be Anco- 

 gnatlia humeralis, Burm., Kirsch having possibly mistaken 

 for the latter the species I have named A. vulgaris. 



Kirsch^s description of Cychcephala atacazo suggests a 

 species of Aticognatha or Barotheus. 



Gyclocephala pugnaa;, sp. n. 



Nigro-fusca, elytris fulvis, sutura sigiiaturisque duabus valde 

 angulatis nigris ; elongato-ovalis, nitida, clj'peo antice arcuato ; 

 prouoto cum scutello minute punctato ; el3'tris fortiter punctatis, 

 punctorum seriebus duplicibus tribus discoidalibus : 



6 , clypeo paulo producto, subtiliter punctato; pedibus anticiscrassis, 

 tibiis acute tridentatis, tarsis brevissimis, articulo ultimo magno, 

 intus late lobato, articulo penultimo etiam lobato et longe ciliato ; 

 pj'gidio opaco, minute ruguloso: 



2 , clypeo semicirculari, sat grosse rugoso ; pedibus simplicibus, 

 tibiis anticis baud acute tridentatis, posticis brevibus, elytrorum 

 margiuibus externis postice angulatis et incrassatis ; pygidio 

 uitido, grosse puucfcato. 



Long. 16-18 mm. ; lat. max. 8'5-9"5 mm. 



Bab. Guiana ; Brazil: Para, Ega, Teffe. 



It is a dark-coloured species, of which the elytra only are 

 pale, with dark markings, which are sometimes reduced to a 

 sutural line and a few dark marks at the shoulders, but may 

 spread into two transverse zigzags, which occasionally 

 unite. A feature which I have seen in no other species is 

 found in the peculiar modification of the front tarsus of the 

 male. The three terminal joints are dilated and finely 

 striated on their inner face, the penultimate one has a fringe 

 of six or seven very strong bristles at its outer edge, and the 

 last joint has a broad lateral process curving backwards to 

 meet the tips of these bristles, the whole forming a rather 

 elaborate grasping apparatus. The inner claw is very large, 



