. of various Coprophagous Lamellicorn Beetles. 227 
* Revue Zoologique,” (1841, p. 212,) consists of Madagascar 
insects which differ very much from each other in several respects, 
so that I am induced to describe several of them as the types 
of respective subgenera. Retaining the Canthon prasinus of Klug, 
(Mad. Col. p. 73,) as the type of the typical subgenus, we find it 
distinguished by the following characters :— 
Mentum latum, suborbiculare, antice valde emarginatum. Palpi 
labiales crassi, articulo ultimo precedenti longitudine quali. 
Prothorax lateribus fere rotundatis, haud reflexis. Elytra 
prothorace manifeste latiora, fere rotundata striata. Pedes 
parum elongati. Femora brevia, subtriangularia. Tibie an- 
ticee elongato-triangulares, depress, rectee ; margine externo 
serrulato, extus acute tridentate. Tvbie 4 postice curvate, 
basi gracillimze, apice sensim dilatato. Z'arst antici minu- 
tissimi; 4 postici tibiarum fere dimidio longitudine, articulo 
basali breviori, ultimo simplici, unguibus curvatis. 
Plate XVI. fig. 1, Epilissus prasinus ; la, instrumenta labialias 1, labial 
palpus ; 1c, anterior tibia and tarsus ; 1d, intermediate 
tibia and tarsus. 
The Canthon viridis of Latreille, figured by Guérin in the 
* Tconographie du Régne Animal,” pl. 21, fig. 3, (Griffith, An. 
Kingd. Ins. pl. 45, fig. 4,) is evidently congeneric with Z. prasinus ; 
indeed Dr. Klug (Col. Mad. p. 73) suggests that it may be the 
female of that species. 
Another beautiful species, described by Laporte under the name 
of Circellium nitidum (Hist. Nat. Ins. Col. vol. 2, p. 66), presents 
the following subgeneric characters, and may be named, from the 
great length of its feet, which give it a resemblance to a spider, 
ARACHNODES, Westn. 
Mentum basi latius, lateribus convergentibus, apice haud emar- 
ginatum. Palpi labiales graciles, articulo ultimo precedenti 
fere dimidio minori. Antennarum clava elongata. Prothorax 
lateribus pone medium valde angulatis et reflexis. EHlytra 
prothorace vix latiora, magis quadrata, haud striata. Pedes 
valde elongati, graciles. Femora elongata, parum compressa. 
Tibie antice graciles, ante apicem subito intus curvate et 
setose, margine externo serrulato, apice dentibus tribus 
parvis obtusis. Tibie 4 posticze graciles, parum curvate, apice 
compresso et valde setoso, calcaribus minutis. Zarsi antici 
fere tibiarum dimidio longitudine ; 4 postici tibiarum dimidio 
plus longiores, omnes compressi, valde setosi, articulo basali 
Q2 
