PALZASTES.—PEDIACUS. 507 
These are smaller differences than those separating the other forms, yet I think it will 
prove advantageous to give this form a distinct name ; as an additional justification for 
so doing, I may mention that when the mandibles are opened their basal lobe is seen 
to be differently shaped in the two insects, and that the eedeagus and parts connected 
with it also exhibit distinctive characters. Six specimens. 
5. Palestes scutellaris, sp. n. 
Mandibulis, clypeo late anterius, antennis, tibiis, tarsis, pedibus posterioribus, mesosterno, abdomine, elytrisque 
(fere totaliter) nigris ; capite, prothorace, mesosterno, elytris plaga scutellari, femoribusque ex parte majore 
rufo-testaceis. 
Long. 9-11 millim. 
Hab. GuateMALa, Zapote, Capetillo, Cerro Zunil (Champion). 
This form is readily distinguished from the others by the elytra being totally black, 
with the exception of a triangular patch about the scutellum. Only three examples 
have been obtained: one of them is in a somewhat deteriorated condition, and has the 
elytra almost entirely black. 
PEDIACUS. 
Pediacus, Shuckard, Elem. Brit. Ent. i. p. 185 (1839); Erichson, Naturg. Ins. Deutschl. iii. 
p- 311. 
This is a small genus of subcortical insects, widely distributed in the Holarctic 
region, but not previously recorded from the tropics. 
1. Pediacus major, sp. n. (Tab. XVI. fig. 10.) 
Depressus, niger, pedibus piceis; prothorace dense punctato, anterius transversim impresso, lateribus 
denticulatis. 
Long. 7-73 millim. 
Hab. Guatema.a, Totonicapam and Quiché Mountains 7000 to 10,500 feet (Champion). 
Thorax densely and coarsely, but irregularly punctate, the punctuation at the sides 
confluent and rugose, on the middle a narrow longitudinal smooth space; near the 
front a very distinct transverse depression; the length is rather greater in the male 
than in the female, and in this latter sex the undulations are more distinct; the 
posterior denticle is very distinct, and is placed only very slightly in front of the basal 
line. The elytra are very dull, and have a very coriaceous, or leathery, surface, and 
bear an excessively fine and scanty pubescence. The male has the front feet very 
slightly dilated, the submentum very densely finely punctate in front, and a large 
impression on the last ventral segment, the female having two, widely-separated, vague, 
jarge depressions. The antenne, too, are a little longer in the male than they are in 
the female. 
We have received six examples of this species: they were found under bark of 
coniferous trees. 
3 T* 2 
