TRACHYTALIS. 115 
TRACHYTALIS, gen. nov. 
Genus Micrutali affine, sed pronoto haudquaquam nitido, densius fortiusque punctato, linedque centrali 
distincté instructo; processu postico multo magis elongato, curvato, dorso a latere viso plus minusve 
sinuato; tegminibus areis apicalibus quatuor, undque magna centrali discoidali; alis areis apicalibus 
tribus, 
Allied to Micrutalis, from the greater number of species of which genus it may be at once known by the large 
central discoidal area of the tegmina, immediately behind which follows a distinct basal area; the chief 
distinguishing characters, however, are the long posterior process of the pronotum, which reaches as 
far, or nearly as far, as the apex of the tegmina, and the more or less distinct sinuation of the dorsum, 
if viewed laterally, as well as the dull fuscous colour, the raised central line of the pronotum, and the close 
and strong punctuation, which is also present on the external part, at all events, of the strongly veined 
a 
tegmina. 
1. Trachytalis isabellina, sp. n. (Tab. VII. figg. 25, 25 a.) 
Tsabellina, fusco-grisea vel fusco-brunnea, obscure griseo-variegata, capite nigro; pronoto dense et distincte 
> 5 ? fo) o 9 P fo) 
punctato, dorso a latere viso levissime sinuato; corpore subtus flavescenti ; tegminibus hyalinis, marginibus 
ad basin maculaque ad medium fuscis; pedibus fuscis vel fusco-testaceis. 
Of a dark dun colour, greyish or brownish, with more or less obscure specks of greyish variegation; head 
black; pronotum thickly and distinctly punctured, very slightly, but distinctly, sinuate, if viewed from 
the side; the body is yellowish underneath; the tegmina are hyaline, with the margin towards the base 
punctured and more or less infuscate, and usually with a distinct elongate fuscous patch at the edge of the 
large discoidal area ; legs fuscous or fusco-testaceous. 
Long. 5 millim.; lat. int. hum. 2 millim. 
Hab. Mexico (coll. Signoret), Chilpancingo in Guerrero 4600 feet (H. H. Smith), 
Orizaba (Bilimek, in Mus. Vind. Ces.). 
A considerable series has been received from Chilpancingo. The two specimens in 
Signoret’s collection are rather larger, and have the fuscous patch on the tegmina more 
marked, but they can hardly be regarded as distinct. We figure an example from 
Chilpancingo. 
2. Trachytalis distinguenda, sp. n. 
Preecedenti simillima, sed dorso a latere viso ad medium sat profunde sinuato, vittaque ad basin processus 
pronoti, apiceque ejusdem extremo excepto, testaceis, facillime distinguendus. 
This species may very easily be distinguished from the preceding by its outline, if viewed from the side, there 
being a deep sinuation in the middle, which causes the front and hinder part to be raised and rounded ; 
the process of the pronotum is also shorter; the general colour is darker, and there is a whitish-testaceous 
ring at the base of the pronotal process, the apex of the latter being broadly whitish-testaceous, except at 
its extreme tip; the tegmina are more distinctly and irregularly infuscate. 
Long. 4 millim.; lat. int. hum. 2 millim. 
Hab. Mexico, Cuernavaca in Morelos (H. H. Smith). 
‘Two examples. In one or two specimens belonging to the preceding species there 
is a tendency to a lighter patch before the apex, but the outline of the dorsum of 
T. distinguenda will at once distinguish it. 
