116 RHYNCHOPHORA. 
border, from which a median sulcus runs back to the vertex. Prothorax with minute reticulation over 
the whole surface, except round the anterior half of the sulcus, and finely and sparingly punctured ; the 
sulcus fine, with a cordiform group of six or seven strige on either side. Elytral declivity nearly vertical, 
convex laterally, finely granulate and pubescent towards the sutural angles, bisinuate below, its lateral 
angles distinct and subrectangular. 
Hab. Mexico, Orizaba (Bilimek); GuaTemata, Cerro Zunil, El Tumbador, Las 
Mercedes (Champion); Panama, Volcan de Chiriqui (Champion). 
Two pairs have been before me from Mexico, and single specimens from the localities 
in Guatemala and Panama. The elytral spines of the male are a little more elongate 
in the Mexican examples; the extent to which these are produced backwards and the 
slender shape well distinguish this sex. 
The female is not clearly separable by description from that of T- linearis, De}., a 
species known by a single example taken in Spain. The type, which was in bad 
condition when examined by Chapuis, is not in his collection, and I am unable to 
trace it. | 
Our collection contains some six or seven females of this genus which appear to 
belong to one, or perhaps two, species, of which the males have not been described. 
They differ from 7. ericius ( @ ) by slight and comparative characters only, and it is 
useless to describe them in the absence of examples of the opposite sex. 
4. Tesserocerus spinax, sp.n. (Tab. V. fig. 5, ¢ .) 
Mas. Elongatus, lete testaceus, capite et elytrorum apice fuscis, pilis longis erectis instructus ; fronte impressa ; 
prothorace oblongo; elytrorum interstitio utroque 1° et processu terminali in spinas longas, acutas, 
incurvatas productis, depressione postica obliqua. 
Long. vix 5 millim. 
Male. Elongate, bright testaceous, with the head and apex of the elytra infuscate. Front oblique, dull, with 
a deep triangular supraoral impression continued by a fine impressed line on to the vertex, which bears 
scattered piliferous punctures; scape slightly curved, pilose, not produced. Prothorax one-half longer 
than wide, narrowed towards the apex, moderately shining, with scattered substrigose punctures bearing 
long sete, and a transverse patch of deep oblong punctures on each side near the base, the median sulcus 
long, fine, and deeper towards the apex. LElytra set with long upstanding hairs; interstices not strongly 
alternate, base of the 3rd simply punctured, apex of the Ist and the postero-lateral angle produced into 
long sharp incurved spines, the 3rd, 5th, and “th interstices shortly spined at the summit of the oblique 
apical declivity and continued on it as caring. 
Hab. Nicaragua, Chontales (Janson); Panama, Volcan de Chiriqui (Champion). 
A single example of this species has reached us from each locality. It is a very 
distinct form, separable from the males of every other known species, except 7’. imernus, 
Guér., by the absence of asperities at the base of the third interstice. 
Division II. TesseRocERI ToRTILES (Chapuis). 
Form less elongate; the groups of points on the prothorax situate at the base. Elytral interstices not alternate 
throughout, flexed outwards posteriorly, and divaricate at the summit of the declivity, which is oblique, 
with the lower border broadly explanate in both sexes, and narrowly emarginate at the suture; postero- 
lateral angles not produced; apex of the last ventral segment not emarginate in the male. | 
