3!)2 MR. H. W. BATES ON NEW COLEOPTEROUS [JuHC 18, 



metasternoque apice argenteo-maculatis. Antenncc dimidio 

 corporis fere teg u ales : thorax antice et postice constrictus, 

 medio transversim qnadratus et convexus : elytra basi thorace 

 fere duplo latiora, postice gradatim leviter angustata, costis 

 iitringue tenuissimis et parum elevatis duahus, fascia Jl.ava 

 nuda sed opaca vage rvgosa : tihicE posticce subrectce, com- 

 press(e, gradatim leviter dilatatce. Long. '67 iiiillim. $ . 

 A single example. 



Gauresthes, nov. gen. 



Gen. Helymsso (Til ins.) a_^nis. Corpus elongatum, elgtris supra 



suhpJanatis^'post medium paullo deliiscentibus. Caput antice 



sat elongatum, mandihulce elongates, rectce ; maxillce exsertce. 



Antenna (c??) dimidio corporis pauUo longiore, ante apicem 



gradatim incrassatfe, articulis 8°-! 1'" iterum angvstatis, scapo 



curvato articulo 3° valde elongato. Thorax breviter sub- 



cglindricus, lateribus utrinque ttibercnlo lato conico. Elytra 



thorace dimidio latiora elongata fere parallelui apice latissime 



rotundata^supra utrinque tenuiter bicostulata. Femora clavata, 



poslica elongata {elytrorum apicem perparum longiora) ; tibiee 



posticcepostmediumpaullulum ciirvata compressae, mediocriter 



dilatatce; tarsi articulo basali duobus sequentibus conjunctis 



subcequali. Sciitellum apice ctcutum, prolongatum. 



Among the few genera of Callifhromince with elavate and petiolated 



femora this new form approaches the African and Arabian Helymceus 



mnch nearer than the Malayan Ipothalia. It differs from Helymceus 



in the three apical joints of the antenna? heing gradually narrower 



with the terminal one obtusely acuminated, in the long straight 



mandibles, and in the different form and punctuation of the thorax. 



Gauresthes ritfipes. 



Nigro-violaceus, subnitidus. cum plagis opacis, pedihus (tiliis 

 posticis cyaneo-violaceis exceptis) rufls : thorace disco antico 

 basique medio impunctato polito, ccetera superficie creberrime 

 subtiliter scabrosa et nigro-opaca, lateribus argenteo-sericeis : 

 scutello subtiliter scabroso viridescente opaco, linea medio 

 polita : elytris subtilissime punctulato-scabrosis, opacis, sicut 

 velutinis, hwneris fasciaque lata ante-mediana sparsius punc- 

 talo-scabrosis, subnitidis : subtus chalybetis, argenteo-sericeus- 

 Long. 28 niillim. J? 



One example only. 



EusYNTHETA, iiov. gen. 



Gew.Achthophorse certeaffinis,sed valdediffert antennisbrevibus, 

 robustis, articulis 4°-l 1'" brevissimis. Breviter oblongo-ovata. 

 Frons trapezoidalis, oculis nulla modo prominentibus. Tuberes 

 antenniferi approximati, paullulum divergentes nee armati. 

 AntenncB ( $ ?) robusti, capite cum thorace paullo longiores, 

 subtus sparsim breviter ciJiatce ; scapo elongato-conico, cicatrice 



