350 SUPPLEMENT. 
This is a difficult species to deal with, its general appearance being that of a Catho- 
rama; it is, however, not admissible into that genus, on account of the antenne being 
distinctly eleven-jointed. From other species of Mirosternus it differs in its more 
robust build. The whole upper surface is clothed with the same extremely short, fine 
bloom or pubescence which we observe in some species of Cathorama, and in Thaptor. 
The head is wide, rufo-piceous above, rufous beneath ; the antenne are rufous, with 
the basal and apical joints darker, the club formed much as in Cathorama, the inter- 
mediate joints very short and transverse, and rather acuminate internally. Two 
specimens. 
PRIOTOMA. 
Dorcatoma, ante, p. 208 (pars). 
Corpus breve, fere semiglobosum. Caput inflexum, in prothorace modice receptum. Oculi interne leviter 
excisi. Antenne decem-articulate. Prosternum antice in medio angulariter productum, postice late 
arcuatim emarginatum, dente medio antico setosello. Mesosternum depressum, medio excavatum. 
Abdominis segmenta utrinque sinuata. Metasternum intra coxas intermedias rotundato-truncatum et 
marginatum. 
Typus Dorcatoma quadrimaculata (ante, p. 209). 
This insect was described from a unique example, and of the other species referred in 
the first part of this volume to Dorcatoma so few specimens were in my hands at first, 
that I was then unwilling to dissect them. A few more having now been found, | 
have carefully examined by dissection both P. guadrimaculata and P. contracta, and by 
inspection without detaching the head or prothorax, P. brevis and P. tenuistriata, now 
added. None of these can be properly included in Dorcatoma as now restricted by 
European writers, as they do not possess the remarkable double fork-like process to 
the prosternum ; neither can they be referred to Cenocara, which the two latter species 
especially seem to come nearer, for the eye is not nearly so deeply excised. With 
Anitys (although P. contracta, P. brevis, and P. tenuistriata appear to have the 
antenne eight-jointed) they have even less affinity. The genus Dorcatoma will in 
consequence only be retained here for the single remaining species, D. tomentosa, 
which will without doubt be ultimately withdrawn also. : 
In P. contracta the front ridge of the prosternum is nearly straight, without any 
point or tuft of hairs; and the hinder ridge, if emarginate, is very broadly so, but the 
structure is practically the same, the anterior legs being rather widely separated; the 
object of the arrangement being apparently to permit the antenne in repose to be 
pushed over the edge of the prosternum into the cavity produced by the depression 
and hollowing out of the mesosternum. In P. guadrimaculata the pubescence is close 
and fine, in the other small round species mentioned here it is sparse and setose; it is 
probable that ultimately these as well as the species with eleven-jointed antenne will 
be generically separated, but it would be premature to do so at present. 
