TRACHELIZUS. . 29 
little produced, so that a narrow angular space is left between them ; the terminal 
angle is incurved. 
Nineteen specimens. 
17. Trachelizus arduus, sp. n. 
Elongatus, rufescens, sutura nigra, prothoracis plagis elongatis elytrorumque vitta versus latera nigricantibus ; 
prothorace subtiliter punctulato, nitido, sulco mediano fere integro; elytris fortiter punctato-sulcatis, seriei 
secunde punctatura subdiscreta. 
Long. 8-10 millim. 
Hab. Guatemata, Sabo and San Gerénimo in Vera Paz, Capetillo (Champion). 
We have received four individuals of this species, and I had at first considered them 
as merely varieties of 7. filiformis. ‘Though they do not agree exactly, they neverthe- 
less differ in certain respects in a common manner from the Mexican species, and I 
therefore treat them as distinct. In 7. arduus the punctures of the second series on 
the elytra—that is, the first series of actual punctures, the sutural groove being 
reckoned as the first series—are almost as distinct as those of the more outer series, 
while in 7 filiformis this series of punctures is more indefinite, owing, it would appear, 
to the interstice that separates the series from the sutural groove being less elevated. 
T. arduus has a less elongate thorax, with the punctuation finer and more scanty, and 
the fovea of the vertex is not distinctly prolonged as a groove on the metarostrum, 
The legs, too, are shorter and thicker. 
This species is to a certain extent intermediate between 7. turgidirostris and 
T. filiformis. 
18. Trachelizus filiformis, sp. n. 
Elongatus, angustus, rufescens, sutura nigricante ; prothorace minus subtiliter punctato, sulco mediano fere 
integro ; elytris fortiter punctato-suleatis, interstitiis angustis. 
Long. 8-12 millim. 
Hab. Mexico, Cerro de Plumas, Bobo (Hége). 
This insect is readily distinguished from all the forms of 7. turgidirostris by the coarse 
dense sculpture of the elytra, the punctures in each series being so closely placed that 
each is separated from the one before and behind it only bya short somewhat indistinct 
interval; the channel on the thorax is unusually elongate, reaching very near indeed 
to the front margin. The impression on the vertex is continued as a groove along the 
metarostrum. The thorax is elongate, rufescent, in some cases piceous in two or three 
places, and the sides are somewhat coarsely, the upper surface more finely punctate. 
The interstices between the serics of large punctures on the elytra are quite narrow, 
and are somewhat raised. On the under surface the head and metarostrum are entirely 
dull, and the serial sculpture is not continued beyond the pterygia; the prosternum is 
almost entirely dull. The punctuation on the breast is rather more distinct than usual. 
