COLEOPTERA. 
151 
Thorax convexus, subconicus, apice truncatus, basi sinuatus, carina 
postica basali, supra basin perpendiculariter sita, ad elytra applicata, medio 
obtuse angulato-producta, utrinque parum emarginata, lateribus acute 
angulata, dein anterius directa, ad medium lateribus thoracis evanescente. 
Scutellum mediocre, suborbiculatum. 
Elytra basi singulatim obtuse rotundata, conjunctim thorace paullo 
latiora, latitudine paullo longiora, liumeris rotundatis, lateribus versus 
apicem angustata, apice ipso singulatim anguste obtuseque rotundata> 
margine inflexo infra basin valde ampliata. 
Pedes longiusculi, crassi; coxis omnibus distantibus; anticis inter se 
carinam parvam transversam prosternalem—intermediisque carinam magis 
elevatam mesosternalem—emittentibus; femoribus clavatis, muticis, apice 
medio parum angustioribus ; tibiis anticis femoribus longioribus, versus 
apicem incurvis, apice ipso intus suhito ampliatis, angulo acutissimo, sub- 
unciformi, subtus crenulatis; intermediis et posticis multo brevioribus, 
femoribus haud aequalibus, rectis, versus apicem sensim ampliatis, subtus 
muticis; larsis anterioribus latis ; articulo lo lateribus rotundato-conica, 
latitudine apicali haud breviore, emarginato-truncato ; 2o latiore, breviter 
triangulare, apice truncato, sed angulis acutissime productis, medium arti- 
culi penultimi superantes—intermediis parum angustioribus, similiter 
constructis—posticis longioribus, intermediis tamen angustioribus; articulo 
lo oblongo-conico, latitudine apicali plus dimidio longiore, truncato ; 2o 
subconico, basi anguste, apice late truncato, angulis valde productis— 
omnium tarsorum articulus penultimus prsecedente latior, profundissime 
bilobus, infra spongiosus—ultimus elongatus, clavatus, biunguiculatus ; 
unguiculis subtus dente medio tenui, longa, subparallela armatis. 
Etym.: Ab apaio$, tenuis , %o/wvvj, clava. 
Typus : Arceocorynus Cumingii, Jehel, e Manilla. 
Obs. —This genus resembles the Arceoceri very much, but the two basal 
joints of the antennas are proportionally thinner, the others less elongate, 
the head is exserted behind the eyes, the pygidium is elongate, and, above 
all, the structure of the legs and the proportionally large size of the body 
(which is that of a moderate sized Anthr. albinus , L.) completely dis¬ 
tinguish it from the species of that genus. 
