EPICARUS. 109 
10. Epicerus costicollis, sp. n. 
Sat elongatus, niger, dense brunneo-squamosus, subvariegatus; prothorace ubique rugoso, medio late suleato ; 
elytris interstitiis 3°, 5°, 7° elevatis, angustis. 
Long. 14 millim. 
Hab. Mexico, Yolotepec (Sallé). 
Rostrum not so densely clothed with scales as the thorax and elytra, the scales 
metallic. Thorax very rugose, with a longitudinal depression along the middle, which 
is limited on each side by an elevation, the latter narrow, so as to appear like an irregular 
costa. The coste on the elytra are rather narrow, sharply raised, and continue so to 
their point of common union before the extremity ; the grooves between them are broad, 
and have only a few very indefinite and very large vague depressions to represent the 
punctures. One pair. 
This species is most like E. coxalis, but is of rather shorter form, has no tubercle on 
the middle coxe, and the scales have a distinctly metallic appearance. I have no doubt 
the specimens are of one species, though the male has the groove on the rostrum very 
obsolete, while it is quite distinct in the female. 
11. Epicerus costatus, sp.n. (Tab. IV. fig. 22, ¢.) 
Elongatus, elytris interstitiis 3°, 5°, 7° elevatis, integris, plumbeo-nitentibus, intervallis dense squamosis ; 
rostro medio canaliculato. 
Long. 18-19 millim. 
Hab. Mexico, Puebla (Sallé), Amecameca (Hége). 
E. costatus is the most elegant species of this group, and it can be very easily 
identified by the great development of the alternate elytral interstices, and the 
diminution of the sculpture between them—it thus results that the second, fourth, 
and sixth interstices cannot be recognized at all. The rostrum is rather longer than 
usual, considerably widened in front, and very distinctly but not broadly sulcate along 
the middle. The thorax has a shallow longitudinal median sulcus, which is slightly 
interrupted about the middle; outside this is an irregular, comparatively smooth 
space; the lateral part of the surface is very coarsely though not deeply rugose. The 
cost on the wing-cases are remarkably definite, and contrast strongly with the spaces 
between them, which are densely covered with very minute, pallid (in the typical 
form white) scales. ‘The legs are only feebly squamose. The swelling or incrassation 
of the front tibia at the tip of its posterior face is more developed in this than in any 
other species of the genus. The female is much broader than the male. 
The three specimens from Sallé’s collection I treat as the typical form of the species ; 
they have the scales in the grooves of the elytra almost white, while in the two 
examples from Amecameca they are pale brown. 
