338 HETEROMERA. 
the peculiarly-coloured legs. In size and colour this insect approaches P. angulicollis, 
Makl., and P. testaceus, Kirsch. : 
3. Pecilesthus fragilicornis. (Tab. XIV. fig. 11, ¢.) 
Oblong, moderately convex, testaceous or fusco-testaceous, shining. Head piceous or black, the anterior half 
and the oral organs more or less testaceous, finely and rather sparingly punctured, the vertex longitudi- 
nally impressed; antenne long (nearly reaching to the middle of the elytra) and very slender, not 
widening outwardly, the joints very little wider at their apex than at their base, 8-11 about equal in 
length, 1-4 fusco-testaceous, 5—7 or 5-8 more or less piceous, 8-11 or 9-11 light testaceous; prothorax 
strongly transverse, rather convex, the base and apex nearly straight, the sides subangularly extended in 
the middle, narrowing anteriorly, and rather abruptly sinuate before the obliquely cut off obtuse anterior 
angles, the hind angles subrectangular, the base deeply impressed within, the basal fovex deep, the 
surface shallowly and sparingly but very distinctly punctured ; scutellum testaceous, sparingly punctured ; 
elytra long, subparallel to beyond the middle, the shoulders rather deeply impressed within, shallowly 
punctate-striate, the interstices sparingly and minutely punctured, the basal fifth and a broad transverse 
band a little beyond the middle, black, the black markings not quite extending to the suture; beneath 
almost smooth, testaceous, the sides of the metasternum broadly and the side-pieces black; legs long and 
very slender, testaceous, the tibiee and tarsi more or less stained with fuscous; anterior tibie in the male 
slightly curved and with the inner margin somewhat thickly clothed with hair. 
Var. a. Elytra with the black basal spot much smaller (not extending to the sides and distant from the suture), 
and with rather more than the apical half black. (Tab. XIV. fig. 12, 3.) 
Var. B. Above and beneath testaceous, the elytra each with a small transverse piceous spot placed a little 
behind the middle. 
Length 84-11 millim.; breadth 33-43 millim. (¢ 2.) 
Hab. Costa Rica (coll. Gorham); Panama, Bugaba (Champion). 
Eight examples. This insect is distinguished by its very slender legs and antenne. 
The different varieties were collected together at Bugaba. 
4. Pecilesthus latus. 
Broad ovate, short, feebly convex, testaceous, shining. Head very finely and sparingly punctured, the vertex 
unimpressed, the eyes a little darker and widely separated; antennee long and slender, gradually widening 
outwardly (the last four joints missing), joints 4-7 slightly stained with piceous on their outer edge ; 
prothorax strongly transverse, feebly convex, the base slightly bisinuate, the apex nearly straight, the sides 
feebly subangularly extended in the middle and narrowing a little in front, the anterior angles broadly 
rounded, the disc transversely impressed in the middle just in front of the basal margin, the basal fovew 
deep, the surface very sparingly, finely, and shallowly punctured ; scutellum almost smooth; elytra com- 
paratively broad, short, somewhat depressed, finely and lightly striate-punctate, the interstices broad, 
quite flat, and very minutely punctured; beneath almost smooth; legs rather slender, the inner edges of 
the tibia and the knees stained with fuscous, the tarsi piceous; the anterior tibie (in the female) slightly 
curved. 
Length 11 millim.; breadth 53 millim. ( 2.) 
Mab. Nicaracva, Chontales (Janson). 
A single specimen. This immature-looking insect somewhat resembles the pallid 
form of P. fragilicornis, but is much broader; the elytra are shorter and broader, very 
lightly striate-punctate, and with the interstices perfectly flat; the head is smoother 
and has the vertex unimpressed, &c. The anterior tibie are almost as strongly curved 
as in the opposite sex of the allied species. 
