80 
INSECTA SATJNDERSIANA. 
sides narrowly but rather highly margined; its centre longitudinally pro¬ 
vided with a broad ridge not reaching to the apex ; each side between that 
ridge and the margin depressed and clothed with a dense yellowish or 
ochreous pile, appearing like two oblong maculae. 
Legs black, slightly and partly clothed with a silky grayish pile; 
elongate and slender. Thighs thin at the base, rather clavate behind the 
middle, the posterior reaching beyond the base of the fourth segment. 
Tibice also slender, at least as long as the thighs, gradually slightly 
dilated to the tip. Tarsi longer than the tibiae, 1st joint most elongate, 
but not half the total length, 2nd very deeply emarginate, nearly containing, 
between its very acutely produced lobes or sides, the third joint, which is 
deeply bilobate and fulvous-spongiose beneath; terminal joint very slender, 
slightly shorter than the first; claws thin: tooth subbasal, almost free, 
thin, a little divergent. 
Obs .—The character of a broad marginal convexity of the elytra, 
including the 10th, and limited by the 9th stria, is peculiar to this species 
amongst the Ptychoderian group ; the acute production of the scutellar 
inter-coxal part of the mesosternum is also singular (being only represented 
in a very slight degree in Tr. prasinaius , Sch., which has this inter-coxal 
process ridged longitudinally, but not angularly extended forwards), as 
well as the broad ridge of the pygidium. 
The species has been received in considerable numbers during these 
last few years. I possessed a specimen long ago from the collection 
of M. Dupont. 
Genus DENDROTROGUS, Jekel. 
Antennae mediocres, crassiusculse, thoracis basin subattingentes, in 
scrobe laterali medio rostri insert®,' 11-articulatae ; funiculo 8-articulato ; 
articulis 1 et 2 clavatis, primo crassiore, 3o paullo breviore, oblongo- 
subclavato, 4—5 longitudine duobus primis, cylindrico-conicis, 6—8 suc¬ 
cessive brevioribus et latioribus quum praecedentibus, 8o magis triangulari, 
latitudine apicali haud longiori; clava 3-articulata, oblonga, latiuscula, 
deplanata, subperfoliata, articulis separatis : lo subtriangulari, intus versus 
apicem angulariter ampliato, angulo acutissimo, apice oblique truncato, 
