64 Mr. G. C. Champion’s Notes on 
serrate, 4-11 very little longer than broad, gradually decreasing in 
size, 11 acuminate at tip; maxillary palpi comparatively short, 
about reaching the tip of the second antennal joint, joints 2 and 3 
obconic, 4 oblong-ovate, not wider than 3. Thorax short, rapidly 
and obliquely narrowing from the outwardly-directed, prominent, 
subacute hind angles; with three small tuberculiform prominences 
at the base—one opposite the scutellum, and one on either side of it, 
the latter transverse ; the base deeply bisinuate. Elytra with several 
longitudinal ridges on the disc, the base depressed on each side 
within the humeri. Abdomen with six visible segments. Legs 
long; tarsi (fig. 2a) with joints 1 and 2 elongate, dilated, densely 
spongy-pubescent beneath, 2 excavate at the apex above for the 
reception of the small third and fourth joints, 1 also excavate for 
the reception of the slender basal portion of 2, the terminal joint 
very slender, about half the length of 2, the claws long and slender. 
Length 32, breadth 14 mm. 
Hab. GuatEema.a, Lanquin in Alta Vera Paz (Champion). 
One example only of this insect was obtained. It was 
captured in February, 1880, on the banks of the Rio 
Cahabon, probably about the entrance of the Lanquin Cave. 
P. grouvellei greatly resembles Psephenus darwint, C. O. 
Waterh., from Rio de Janeiro, figured in “ Aid ident. Ins.,”’ 
i, pl. 26; the latter has simple slender tarsi. 
SILPHIDAE. 
LIODEs. 
Inodes, Erichson, Nat. Ins. Deutschl. ii, p. 87 (1845); Horn, 
Trans. Am. Ent. Soc. vi, pp. 277, 296 (1880). 
This Holarctic genus, with nine species in North America, 
has not hitherto been recorded from so far south as Mexico. 
Mr. H. H. Smith has, however, sent us a single example of 
a species from the mountains of Guerrero. allied to the 
Kuropean L. castaneus and L. orbicularis, i.e. with all 
the tarsi 4-jointed in the female. The only N. American 
form with confused elytral punctuation, L. confusus, has, 
like the other species enumerated by Dr. Horn, the 9-tarsi 
5-, 4-, 4-jointed. Some authors use the generic name 
Amisotoma for this genus. 
*Inodes mexicanus, Nn. sp. 
Subhemispherical, very convex, shining, nigro-piceous, the 
labrum, the two basal joints of the antennae and the tip of the 
