36 RHYNCHOPHORA. 
16. Eugnamptus rufifrons, sp. n. (Tab. II. fig. 7.) 
Longulus, parce setosus, niger, elytris cyaneis, vertice rufo; elytris subtiliter seriatim punctatis. 
Long. cum rostro 4} millim. 
Hab. Mexico, Totosinapam (Sal/é). 
Antenne black, very slender, with the long club rather less slender, each joint of 
the club narrowed towards the base, the terminal joint much shorter than the tenth. 
Rostrum short, as long as the head, the eyes very prominent, the head almost im- 
punctate. Thorax very slender, but slightly conical, sparingly subobsoletely punctate, 
shining. Elytra very elongate, with very regular series of fine punctures, the interstices 
broad, flat, without any distinct punctuation. Legs very slender, the middle tibie of the 
male strongly curved. In the female the eyes are rather smaller and more distant. 
One of the most slenderly-formed members of the genus. It was labelled in Sallé’s 
collection E. rufifrons, Chevr. Three examples. 
17. Eugnamptus niger, sp. n. 
Niger, nitidus, griseo-setosus, elytris nigro-subcyaneus; prothorace parce punctato; elytris seriatim crebre sat 
fortiter punctatis, interstitiis modice angustis, haud omnino planis. 
Long. cum rostro 4; millim. 
Hab. Mexico, Ventanas and Refugio in Durango (//ége). 
Antenne moderately long, the club not linear, each joint being narrowed towards 
the base, the terminal joint quite acuminate, shorter than the tenth. Rostrum rather 
longer than the head; eyes large, approximate to the neck, the space between them 
finely punctate at the sides, smooth and shining on the middle. Thorax rather slender, 
moderately finely and not closely punctate. Elytra blue-black, shining, the punctures 
in the series rather closely placed. Legs very slender. | 
Allied to E. rufifrons, but independently of the colour of the head it differs in 
numerous details. We have received only two specimens, which I presume are males, 
the apex of the middle tibia being slightly produced internaily and acuminate. 
18. Eugnamptus longulus, sp. n. 
Longulus, cyaneus, griseo-setosus, nitidus, antennis pedibusque nigris ; prothorace gracili, parce, haud subtiliter 
sed levissime punctato; elytris elongatis, seriatim crebre sat fortiter punctatis, interstitiis modice 
angustis, haud omnino planis. 
Long. cum rostro 5-6 millim. 
Hab. Mexico, Parada, Juquila (Sal/é), Oaxaca (Hége). 
Closely allied to £. niger, but more elongate in form, with the surface of a beautiful 
blue colour, and with the punctures of the thorax so slightly impressed that they are 
indefinite and the surface irregular. The four examples received include both sexes, 
the male having the middle tibia incurved and strongly acuminate at the inner angle. 
