DIRCHA.—XEUXES. 85 
pubescence. Head finely and very densely punctured; antenne (¢) very long and slender (extending to 
beyond the middle of the elytra), joints 4-11 exceedingly elongate, ferruginous ; maxillary palpi(d) 
with the second joint one and a half times the length of the apical joint, the latter securiform and about 
one third longer than the elongate-triangular third joint; prothorax longer than broad, the sides margined 
from the base to the apex, narrowed in front, and a little rounded behind, the surface very densely and 
finely punctured, and with a very shallow impression on each side at the base, the disc with traces of a 
_ smooth central line, the base strongly bisinuate; elytra flattened on the disc towards the base, with well- 
marked sutural stria and shallow longitudinal grooves, the surface very finely and densely punctured, the 
punctures becoming coarser and still closer towards the base, granular, more scattered, and here and there 
transversely confluent at the shoulders, and finer and more distant towards the apex, the apices obtuse ; 
beneath finely and densely (the metasternum in the middle more coarsely and roughly) punctured and 
pubescent, the ventral surface densely and uniformly so; prosternal episterna not separated from the 
anterior portion of the prosternum ; legs fusco-ferruginous, the outer edge of the four hinder tibie with a 
series of transverse ridges; apical margin of the fifth ventral segment produced in the middle and with its 
apex truncate, and the anterior tarsi broadly dilated, in the male. 
Length 14 millim. (¢.) 
Hab. Mexico, Santecomapan (Sallé). 
A single male example. This species has a very elongate second joint to the 
maxillary palpi, and exceedingly long and slender antenne, characters of almost 
generic importance, but agrees very closely in other respects with Dircwa; it is 
accordingly included, provisionally, in this genus. The very elongate antenne, rugose 
shoulders, ridged hinder tibie, &c., distinguish D. longicornis from D. mexicana. The 
oblique ridge limiting the prosternal episterna anteriorly is not present in D. longi- 
cornis. In the form of its antenne, tibie, &c., D. longicornis closely approaches the 
Chilian genus Dentipalpus. 
XEUXES. 
Maxillary palpi with the apical joint cylindrical and moderately long, the second and third joints subtriangular ; 
last joint of the labial palpi narrow, oblong ovate; mentum about as long as broad, widest behind ; 
mandibles entire at the apex, but with a short, blunt tooth on the lower side beneath ; labrum prominent ; 
head broad, vertical, the epistoma not distinctly defined; eyes convex, deeply emarginate in front ; 
antenne short, passing a little beyond the base of the prothorax, 11-jointed—3 triangular, longer than 4, 
4-10 short and strongly serrate, 5-8 the widest, 11 ovate and narrower and longer than 10; prothorax 
broad and strongly transverse, with deep basal foves:; scutellum large; elytra depressed, moderately 
long, very little wider than the prothorax, broadly rounded at the shoulders, subparallel to beyond the 
middle; anterior coxe separated by the prosternum, the latter rounded off behind, the cavities closed 
externally and without lateral fissure; prosternal episterna with well-defined suture in front; middle 
coxee narrowly separated, the cavities open externally, and the trochantin visible; metasternum long; legs 
slender ; tibial spurs short; tarsi slender, the penultimate joint not lobed or dilated, the first joint of the 
posterior pair the length of the other three joints united ; claws slender, a little dilated at the base; form 
elongate, rather depressed. 
This genus is proposed to include a single species from North-western Mexico. It 
is perhaps nearest allied to the recently-described Mallodrya, Horn, from the United 
States, though approaching Melandrya &c. The chief characters of Xewxes are the. 
short, serrate antenne, simple tarsi, short tibial spurs, and cylindrical apical joint of the 
maxillary palpi. The maxille are formed very much as in Dircea. 
