392 
MR. H. W. BATES ON NEW COLEOPTEROUS [June 18, 
metasternoque apice argenteo-maculatis. Antenne dimidio 
corporis fere equales: thorax antice et postice constrictus, 
medio transversim quadratus et convexus : elytra basi thorace 
fere duplo latiora, postice gradatim leviter angustata, costis 
utrinque tenuissimis et parum elevatis duabus, fascia flava 
nuda sed opaca vage rugosa: tibie postice subrecte, com- 
presse, gradatim leviter dilatate. Long. 37 millim. &. 
A single example. 
GAURESTHES, nov. gen. 
Gen. Helymzeo(Thoms.)affinis. Corpus elongatum, elytris supra 
subplanatis, post medium paullo dehiscentibus. Caput antice 
sat elongatum, mandibule elongate, recte ; maxille exserte. 
Antenne (3°) dimidio corporis paullo longiore, ante apicem 
gradatim incrassate, articulis 8°—11" tterum angustatis, scapo 
curvato articulo 3° valde elongato. Thorax breviter sub- 
cylindricus, lateribus utrinque tuberculo lato conico. Elytra 
thorace dimidio latiora elongata fere parallela, apice latissime 
rotundata, supra utrinque tenuiter bicostulata. Femora clavata, 
postica elongata (elytrorum apicem perparum longiora) ; tibie 
postice post medium paullulum curvate compresse, mediocriter 
dilatate ; tarsi articulo basali duobus sequentibus conjunctis 
subequali. Scutellum apice acutum, prolongatum. 
Among the few genera of Callichromine with clavate and petiolated 
femora this new form approaches the African and Arabian Helymeus 
much nearer than the Malayan Ipothalia. It differs from Helymeus 
in the three apical jomts of the antenne being gradually narrower 
with the terminal one obtusely acuminated, in the long straight 
mandibles, and in the different form and punctuation of the thorax. 
GAURESTHES RUFIPES. 
Nigro-violaceus, subnitidus, cum plagis opacis, pedibus (tiliis 
posticis cyaneo-violaceis exceptis) rufis : thorace disco antico 
basique medio impunctato polito, cetera 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, humeris fasciaque lata ante-mediana sparsius punc- 
tato-scabrosis, subnitidis : subtus chalybeus, argenteo-sericeus. 
Long. 28 millim. 3! 
One example only. 
EusyNTHETA, nov. gen. 
Gen. Achthophore certe afjinis, sed valde differt antennis brevibus, 
robustis, articulis 4°-11" brevissimis. Breviter oblongo-ovata. 
Frons trapezoidalis, oculis nullo modo prominentibus. Tuberes 
antennifert approximati, paullulum divergentes nec armati. 
Antenne (2°) robusti, capite cum thorace paullo longiores, 
subtus sparsim breviter ciliate ; scapo elongato-conico, cicatrice 
