58 RHYNCHOPHORA. 
i3. Rhaphirhynchus politus. 
Rhaphidorrhynchus politus, Senna, Aun. Soc. Ent. Belg. 1894, p. 605°. 
Hab. Mexico}, Toxpam (Sal/é). 
The striation on the sides of the front of the thorax is very distinct in this species, 
and there is a biserial foveolation of the under surface of the head and metarostrum. 
This sculpture is very coarse in the female, and the foveoles are more approximate. 
Three specimens. 
14. Rhaphirhynchus auricollis, sp. n. 
Eneus, nitidus, antennis pedibusque rufescentibus ; elytris ineequalibus, fuscescentibus, numerose rufo-signatis, 
juxta suturam bistriatis, externe fortiter striato-punctatis, angulo apicali parum prominulo. 
Long. 14 millim. 
Hab. Mexico, Toxpam (Sallé); Nicaracua, Chontales (Belt). 
Male. Antenne rather long; first joint without descending process, but with a 
tubercle in its place; third joint a good deal longer than second. Head narrow; 
rostrum with a distinct, small, subangular dilatation at the tip, black. Thorax very 
shining, of a golden colour, broad, but very much narrowed in front in consequence 
of the narrow neck. Elytra broad, their surface somewhat uneven owing to a vague 
large impression on the middle and another impression behind; the tip sinuate- 
truncate, with the external angle a little prominent; of the series next the suture, 
only two are strie; outside this are rows of large, very distinct punctures, the inter- 
stices being broad, not at all convex; the flavescent marks are none of them very long ; 
short marks on the third to the seventh interstices form an interrupted transverse band 
behind the middle; the third interstice is flavescent from the base to the middle; the 
fourth and fifth interstices are flavescent at the extreme base, where the yellow colour, 
indeed, is continuous in the transverse direction from the third to the fifth interstices ; 
the eighth and ninth interstices have a small geminate mark some distance behind the 
shoulder, and the ninth has also a very obscure mark near the tip; another obscure 
flavescent mark exists at the tip on the third interstice. Under surface brassy and 
polished; abdomen very feebly impressed along the middle; prosternum and under 
surface of the head and metarostrum granulate, the latter without serial punctures. 
Legs rather long. | 
The only species this resembles superficially is A. politus, but it is easily distin- 
guished by the large punctures on the elytra, the broad interstices, and the vague 
depressions on the dorsal region. 
Two specimens. 
The male of R. auricollis has a minute angular dilatation of each side of the tip of 
the rostrum, so that this species may be taken as the first one of the series of forms 
uniting Rhaphirhynchus and Belorhinus. 
