476 Mr. F. P. Pascoe on some new or little-known 
Pedes mediocres ; tibie lineares; tarsi antici art. tribus basalibus dila- 
tatis (¢?) tertio subbilobo, penultimo parvo: intermedii et postici art. 
basali paulo elongato, penultimo minore, ultimo mediocri. Prosternum 
postice in cavitate mesosterni receptum. Corpus oblongo-ovatum, 
convexum. 
I have adopted this genus, which does not appear to have been 
published, from one of M. Deyrolle’s lists. It differs from the 
former, inter alia, in the third joint of the anterior tarsus being sub- 
bilobed, with the small penultimate joint inserted between the lobes. 
Nautes fervidus. 
N. cupreus, nitidus ; elytris lineato-sulcatis, sulcis fere obsolete punctatis. 
Hab. Mexico. 
Bright reddish copper, shining; head finely but not closely punc- 
tured; lip testaceous, hairy; prothorax minutely and rather remotely 
punctured, the margin on each side thickened ; scutellum triangular ; 
elytra with nine narrow but deeply sulcated lines on each, the outer- 
most not extending to the base, the lines marked at regular intervals as 
if punctured ; body beneath and legs dark greenish copper; tarsi and 
antennze ferruginous. Length 4 lines. 
Arcotuymus | Helopinee }. 
Caput retractum ; clypeus distinctus, antice rotundatus. Oculi transversi, 
distantes. Palpi mavillares securiformes ; Jabiales cylindrici. Mentum 
transyersum, antice bisinuatum, postice valde constrictum. Labiwm 
apice emarginatum. Antenne filiformes; articulo tertio elongato, 
ceteris longitudine equalibus, subobconicis, ultimo oblongo-ovato 
Prothorax transyersus, antice rotundatus, pone medium incurvatus 
angulis posticis acutis, apice late emarginatus, basi truncatus. Elytra 
prothorace basi latiora, dorso subplanata, lateribus subito declivia et 
rotundata, epipleurze angustatee. Pedes ineequales, graciles ; tbie cal- 
caratee ; tars? postici articulo basali czeteris simul sumptis fere longiore. 
Prosternum productum. Mesosternum longiusculum, latum, subver- 
ticale. Processus interfemoralis latus. 
The type of this genus is rather above the ordinary size, and in 
outline resembles the shorter species of Blaps. Like so many other 
genera in this family, it does not appear, to have any very obvious 
affinities. 
Arcothymus coenosus, 
A, niger, pube scabra fuscescente tectus, infra glaber, nitidus ; elytris ob- 
solete striatis. 
Hab, Australia. 
Black, covered with a rough brownish pubescence composed of short 
