PTEROCYCLON. 273 
Hab. Payama, Volcan de Chiriqui (Champion). 
One example. In the formation of the elytra, this species resembles P. validum 
and P. preruptum. 
3. Pterocyclon preruptum, sp. n. (Tab. VIII. fig. 14, ¢, apex of elytra.) 
Mas. Subelongatus, subnitidus, parce breviter pilosus, piceus, antennis pedibusque ferrugineo-testaceis ; pro- 
thorace latitudine sublongiore, apice fortiter rotundato, posterius subtiliter punctulato ; elytris indistincte 
punctatis, ad suture apicem emarginatis; declivitate oblique excavata, obcordata, punctata, lateribus 
elevatis utrinque spinula parva et dente trapezoidali armatis. 
Long. 4°3 millim. 
Male. Cylindrical, somewhat elongate, moderately shining, with short scanty hairs, piceous, the base of the 
elytra somewhat lighter, the antenne and legs ferruginous-testaceous. Forehead subconvex, dull 
towards the mouth, glabrous, strongly punctate, with a median subelevated smooth line, more marked on 
the epistoma; antennal club rather large, ovate, its sutures scarcely curved. Prothorax a little longer 
than broad, in front strongly rounded, the sides subparallel from the middle to the truncate base, the hind 
angles obtuse; disc convex and declivous for the anterior third, with rather small imbricate asperities and 
scattered hairs, the posterior part moderately shining, finely punctured, with an indistinct median 
impunctate line. Scutellum small, rounded-triangular, shining. Elytra scarcely so wide as the pro- 
thorax and about one-half longer, truncate at base, with subrectangular humeral angles, the sides 
slightly curved and narrowed posteriorly, the apical margins emarginate in the middle for a third of the 
width, the emargination as deep as wide; surface cylindrico-convex, flatter along the suture, indistinctly 
lineato-punctate and finely wrinkled, the interstitial spaces minutely punctured; declivity obliquely 
retuse, obcordate, and longer than broad, rounded above at the junction with the anterior part of the 
elytra, armed on either side above with a small pointed tubercle rather remote from the suture and 
succeeded by a strongly raised lateral margin which is produced in the middle into a short horizontal 
tooth, obliquely truncate at the tip, with an acute lower angle separated by a sharp notch from the lower 
part of the side-margin, which is scantily setose ; fundus of the declivity concave, laterally punctured. 
Underside piceous, pubescent ; anterior tibie strongly serrate. 
Hab. Guatemata, Totonicapam 7000 to 8000 feet (Champion). 
One example. A large species, with but one small tubercle above the large truncate 
tooth on each side of the elytral excavation. 
4, Pterocyclon tomicoides, sp. n. (Tab. VIII. figg. 15, ¢ ; 15a, apex of 
elytra, ¢ .) 
Mas. Oblongus, cylindricus, sat nitidus, niger, antennis ferrugineis, tibiis et tarsis rufescentibus; prothorace 
oblongo, ad apicem fortiter rotundato, dorso post medium distincte punctato, linea media levi; elytris 
subrugulosis, tenuiter lineato-punctatis, pone medium fere ut in Tomico quodam excavatis, fundo concavo, 
punctato, ambitu obcordato, subacuto, infra late emarginato, lateraliter ciliato et utrinque tridentato, 
dento 1° minuto prope suturam, 2° majore acuto, 3° sat remoto, quadrato. 
Long. 3°4 millim. 
Male. Oblong, cylindrical, somewhat robust and not elongate, moderately shining, black. Front of the head 
moderately convex, strongly punctured, sparsely towards the middle, glabrous, slightly shining above, 
opaque over the mouth, which is fringed; antenne ferruginous, the club regularly oval, with curved 
sutures. Prothorax longer than broad, strongly rounded in front from the middle to the apex, the sides 
nearly parallel behind, the hind angles obliquely rounded, the basal border transverse ; surface convex 
and declivous before the middle, cylindrical behind, with an indistinct transverse elevated line at the 
junction, its anterior portion not strongly asperate, with a few fine hairs, the posterior portion moderately 
BIOL. CENTR.-AMER., Coleopt., Vol. LV. Pt. 6, November 1904. 2NN 
