TRIGONOGENIUS.—PITNUS. 197 
separated by Wollaston under the name Sphwricus, which is synonymical with, but 
prior to, Tipnus, Jaq. Duval. There is, I think, no doubt these species should be kept 
separate. The species now described differ from typical Trigonogenit in being hairy ; 
but their geographical range is not so far different as to make me think it would be 
otherwise than rash to separate them before I have had an opportunity of examining 
the Chilian type. In its hairy surface this insect presents some analogy to Piotes, 
Wollaston. 
1. Trigonogenius niveus. (‘l'ab. X. fig. 3, var. fig. 4.) 
Ater, parce atripilosus ; thoracis disco linea alba; elytris oblongo-subglobosis punctato-striatis, singulis fascia 
tenui baseos, scutello punctis duobus pone medium, et uno apicali niveo-squamosis, parvis; antennis 
corporis fere longitudine, articulis gradatim longioribus. Long. 2 millim. 
Hab. GuateMALA, Capetillo, Chacoj (Champion). 
Var. elytris striga subhumerali, punctis duobus pone medium, margineque apicali tenuiter albis. 
Hab. Panama, Volcan de Chiriqui (Champion). 
Head with white scales; eyes not large nor prominent; antenne eleven-jointed, 
inserted closely together; joints two to six longer than wide, subequal; joints seven 
and eight a little longer (these are pubescent with greyish hairs); joints nine, ten, and 
eleven rather longer, with black pubescence, the two subapical ones slightly serrate. 
The thorax is scarcely wider than long, rugulose, and densely covered with short 
irregular hairs ; the base is a little constricted, and its margin reflexed. ‘The elytra are 
a little shining, with rows of distinct deep punctures and long erect hairs. ‘The under- 
side of the body is very closely covered with white scales. | 
The specimens from which this description is taken are both from Capetillo, and may 
be males; they are smaller, have shorter antenne, and rather more globose bodies than 
two others, which are those from which the figures in our Plate are taken. In one of 
these, that from Chacoj (fig. 3), the elytra have a subhumeral elongate spot with three 
others which are smaller—one nearer the margin (not appearing in the figure), two 
between the larger one and the scutellum. In the other, that from Chiriqui (fig. 4), 
the smaller spots are wanting; these are possibly the females of the same species. On 
so few specimens it is of course not possible to form a decided opinion, especially as 
they are from different localities; but it will certainly be better to consider them as 
such till the question can be settled. I take the Capetillo specimens as types. 
PITNUS. 
Corpus parvum, oblongo-subglobosum. Caputdeclivum. Antenne novemarticulate, articulo summo claviformi. 
Thorax basi leviter constrictus, marginatus. Tarsi quinquearticulati. 
The nine-jointed antenne remove this minute species from any genus of Ptinide 
