340 HETEROMERA. 
comparatively strongly margined thorax readily distinguishes this insect from all others 
inhabiting our region. The single example from Cordova has the longitudinal streaks 
on the elytra much more interrupted and somewhat differently arranged. A female 
typical example from Zapote is figured. 
7. Pecilesthus immaculatus. (Tab. XIV. fig. 13, ¢ .) 
Oblong ovate, rather convex, red or fusco-testaceous in tint, shining. Head almost smooth, unimpressed 
between the eyes; antennz moderately long, gradually widening outwardly, joints 8-10 about equal in 
width, longer than broad, and very slightly decreasing in length, the apical joint the width of but rather 
longer than the tenth, black, the basal two joints and the extreme apex testaceous ; prothorax strongly 
transverse, feebly convex, the base slightly bisinuate, the apex nearly straight, the sides subangularly 
extended about the middle, narrowing in front, and somewhat abruptly emarginate before the obtuse 
anterior angles, the basal fovexw shallow, the surface shallowly, finely, and very sparingly punctured ; 
scutellum smooth, piceous or black; elytra moderately convex, comparatively short, subparallel in their 
basal half, deeply and rather coarsely punctate-striate, the interstices very slightly convex and very 
sparingly and minutely punctured; beneath smooth, impunctate; legs rather long, the apices of the 
femora, and the tibie and tarsi, stained with piceous; anterior tibia in the male slightly curved and with 
the inner margin clothed with short scattered hairs. 
Length 6-8 millim.; breadth 3-32 millim. (db @.) 
Hab. Panama, Volcan de Chiriqui (Champion). 
The two examples differ a little inter se, but I have no doubt they are the sexes of 
the same species. The male is bright red in tint, and has only the outer edges of the 
tibiae piceous, and the sides of the thorax more deeply emarginate in front than in the 
female; the latter is of a fusco-testaceous colour, and has the tibiz entirely piceous ; 
both have the scutellum dark. 
8. Pecilesthus leviceps. (Tab. XIV. fig. 14, 2.) 
Oblong ovate, moderately convex, testaceous, shining. Head smooth, deeply longitudinally impressed in the 
middle between the eyes; antennse moderately long, gradually widening outwardly, joints 8-10 equal in 
width but decreasing in length, the apical joint the length of the eighth, joints 7-11 piceous, the extreme 
apex of the eleventh and the basal six fusco-testaceous; prothorax strongly transverse, comparatively 
convex, the base feebly bisinuate, the apex almost straight, the sides a little extended about the middle, 
narrowing anteriorly, rather abruptly emarginate before the deflexed and rounded anterior angles, and 
slightly sinuate behind, the entire base deeply grooved within, the surface very sparingly and shallowly 
punctured; scutellum testaceous, smooth; elytra moderately convex, comparatively short, subparallel in 
their basal half, shallowly and rather finely punctate-striate, the interstices slightly convex and finely 
and somewhat closely punctured, a narrow curved transverse band a little below the shoulders 
(extending upwards on the second and third interstices, but not reaching the lateral margins), a sub- 
angular rather broad common transverse median band (extending triangularly forwards along the suture 
but not reaching the lateral margins), and a transverse patch on the disc of each midway between this and 
the apex, fusco-piceous ; beneath smooth, impunctate, the epipleuree and the sides of the meso- and of the 
metasternum and side-pieces stained with fusco-piceous; legs comparatively rather short, the apices of 
the femora and the tibie and tarsi stained with piceous. 
Length 74 millim.; breadth 3 millim. ( 2.) 
Hab. Panama, Volcan de Chiriqui 3000 feet (Champion). 
One example. This insect is allied to P. ¢mmaculatus; it is, however, readily sepa- 
