21 
agreeing with Pteridotelus in other characters [e. g. A. maculi- 
collis) ; others have the joints in question ciliated in the d and 
at the same time elongated (A. lateralis ) ; and many species 
agree in the shape of the sterna, whilst resembling typical Acan- 
thoderes in all other characters. I have thought it best on this 
account to treat Pteridotelus as a subgenus or section of Acan- 
thoderes, 
Acanthoderes and its allies [Steirastoma, Myoxinus^ &c.) are 
not, perhaps, so closely allied to the preceding genera as Poly- 
rhaphis ; it would therefore in some respects be better to place 
the latter genus after AEgomorphus, followed by the Anisocerinse, 
with which group it has also an evident connexion; whilst Acan- 
thoderes leads through Alphas naturally to the Acanthocinitse. 
This, however, would be presenting only one suite of affinities 
amongst several which these insects present : the Acanthocinitse, 
for instance, have a certain similarity to Oreodera and AEgomor- 
phus. It seems almost hopeless to detect the true lines of affi- 
nity, and quite so to represent them in a scheme of arrangement 
when detected, 
§ 1. Antennae with the terminal joints filiform, slender. 
a. Fore tibiae widely dilated and compressed. 
1. Acanthoderes hehes, n. sp. 
A. oblongus, convexiusculus, postice rotundatus, supra tomento fusco, 
subtus pilis griseis sparsim vestitus : thorace tuberibus lateralibus 
obtusis, dorsalibus tribus magnis : elytris apicibus parum trun- 
catis, fuscis, fascia abbreviata pone medium nigra velutina, prope 
apicem ochreo maculatis. Long. 5 lin. d 2 • 
Head and thorax sooty-brown, with deep scattered punctures. 
Antennae about the length of the body, black; base of each joint 
(from the third) and centre of the third with a pale testaceous 
ring. Thorax with the lateral tubercles obtuse; three dorsal 
ones — two anterior very large and prominent, and one posterior 
smaller and acute. Elytra rounded at the sides, towards the 
apex very briefly truncated, with a short, tuberculated, longitu- 
dinal, slightly elevated ridge in the middle of each near the base; 
punctured throughout, the punctures accompanied by granulations 
towards the base : the ochreous spots near the apex are few and 
irregular. Under surface shining black, with a scanty grey pile. 
Legs shining black, middle of the tibise on the edge, tips of same, 
and basal joints of the tarsi above greyish ; tarsi beneath yellow, 
claw-joint pallid. In the d the fore tarsi are black beneath, and 
densely fringed with black hairs. The fore tibiae are abruptly 
dilated from the middle in the d , more gradually so in the 2 • 
On boughs of dead trees in the forest, Ega. Rare. 
