RHAPHIRHYNCHUS. 61 
Hab. Panama, Bugaba, Volcan de Chiriqui 2000 to 3000 feet (Champion). 
The colour of the metallic parts of the surface of this species is more like that of 
polished steel than of brass. The rostrum is rather long; the metarostrum is a good 
deal thickened from the base to the apex, where it does not exhibit any additional 
lateral expansion. The antenne are elongate and slender; the basal joint beneath 
greatly arched, and with a descending slender angular process. The thorax is very 
elongate, highly polished, the lateral strigosity very distinct. The elytra have four 
grooves next the suture, of which only one can be said to be impunctate ; the second 
is, however, only very indistinctly punctate, while the outer of the four is strongly 
punctate. The markings are: third interstice yellow, but the colour interrupted on 
the middle; fourth with two short yellow marks, one of them at the posterior part of 
the anterior half of the yellow colour on the third interstice, the other at the anterior 
part of the posterior portion ; fifth interstice with a spot at the base; ninth interstice 
with a not very long mark behind the shoulder and a shorter one before the apex. 
Basal segment of the abdomen with a few erect hairs along the middle. 
We have received only five males of this species; it resembles 2. politus, Senna, 
but that species has the basal joint of the antenne simple, and the yellow marks 
on the third and fourth interstices are, as it were, reversed in comparison with 
R. chiriquensis. 
One of the individuals has the striz on the sides of the thorax very strongly marked, 
but I think this character is somewhat variable. The length of the denticle at the 
apex of the elytra also varies, as it does in other species of the genus. 
90. Rhaphirhynchus sennai, sp. n. 
Minus gracilis, niger, prothorace sordide ‘neo, opaco; elytris ad suturam tristriatis, externe sat fortiter 
striato-punctatis, apicem versus angustatis, angulo externo haud dentato, interstitiis 3°, 4°, et 9° flavo- 
lineatis. 
Long. 14-20 millim. 
Hab. Guatemata, Purula (Champion). 
The small individuals of this species resemble in form 2. panamensis and its allies, 
but the large individuals are more robust, and differ from 2. panamensis in that the 
legs and antenne become thicker rather than longer; hence, large specimens of this 
species remind one of Lpisphales, while this is not the case with small individuals. 
The antenne are black, dull, without any descending process on the first joint. The 
prorostrum is black, stout, its armature rather large. Metarostrum, head, and thorax 
of a sordid brassy colour, very dull, the latter broad behind, the neck of the head 
somewhat broader than in R. panamensis. Elytra more than usually narrowed behind, 
and almost truncate at the tip; next the suture with three striae, which are indistinctly 
punctate; the fourth stria distinct at the base, but at the middle ceasing to be a stria, 
and becoming for a short distance a series of punctures; outside this are three distinct 
