Genera and Species of Coleoptera. 49 
Macroroma [ Prionide }. 
Serville, Ann. de Soc. Ent. de Fr. 1. p. 137. 
Macrotoma servilis. 
M. fusco-castanea, subnitida; prothorace transverso, lateribus submuticis, 
antice tridentatis, postice unispinosis; scutello postice rotundato ; ely- 
tris connexo-punctatis, haud vermiculatis ; abdomine glabrato, polito. 
Hab. Australia (Melbourne). 
Dark chestnut-brown, subnitid; head coarsely punctured ; antennze 
longer than half the length of the body, all the joints more or less 
punctured, the third nearly as long as the two next together ; prothorax 
shortly transverse, irregularly and coarsely punctured, the middle por- 
tion of its sides straight, but gradually diverging to the base, nearly 
meeting, anteriorly with three teeth, posteriorly with a spine, at the base 
of which are two or three short teeth; scutellum rounded posteriorly ; 
elytra much broader than the base of the prothorax, the sides slightly 
rounded, closely punctured, the punctures becoming coarser and more 
or less connected, although never vermiculate, as they approach the 
suture and base, this part also being darker or somewhat pitchy; 
abdomen and legs pale chestnut, highly polished; metasternum thinly 
pilose, prosternum coarsely punctured. Length 18 lines. 
The only described Australian Prionid that approaches this is 
Hermerius impar of Newman, which, inter alia, differs in its hairy 
prothorax and the thick mass of woolly pubescence which clothes the 
abdomen. I have not adopted the genus, however, from the im- 
possibility of seeing how it is to be separated from some forms of 
Macrotoma. There are several undescribed species from Australia, 
differing from each other in a not very tangible manner, but mostly 
having the sides of the prothorax more denticulate. I fear, how- 
ever, that the amount of denticulation is very often, in this family, 
a character varying according to the individual. In the specimen 
just described, the two posterior teeth of the anterior angle of the 
prothorax are distinctly bifid on the right side, but are entire on the 
left. So in Mr. Newman’s genus Cnemoplites*, the teeth on the 
protibiz, in a specimen of an undescribed species in the British 
Museum, are five on one side, and three on the other; in an allied 
species the intermediate tibize are also toothed, and in my Mallodon 
Jiguratum all the tibie. The Prionide, as they are constituted at 
present, appear to be a very unsatisfactory family, containing several 
anomalous genera, and others which are extremely difficult to limit. 
* Mr. Newman describes Cnemoplites thus: “ Protibiis excurvatis, extus spi- 
nosis” (Entom. p. 351); and, in addition to C. edulis (unknown to me), refers to 
it Prionus spinicollis, Macleay, which has ai/ the tibise spined, and which I cannot 
separate from Macrotoma. It is, in fact, very near my Macrotoma gemella. 
VOL. Il. E 
