PIEROCYCLON. 279 
median elevated line, in other respects similar. Elytra generally similar, but somewhat more parallel- 
sided towards the apex, and with less evident punctuation ; apical declivity entirely similar. 
Hab. Panama, Volcan de Chiriqui (Champion). 
The one example is so closely allied to P. glabrifrons that it cannot be safely 
distinguished except by the sculpture of the head, which is sufficient to separate it. 
The little lobe at the tip of the mandible is curious and suggests a deciduous piece, 
but it has not been ascertained to be anything of the kind, and no such structure has 
yet been described in this family. 
13. Pterocyclon mali. 
Tomicus mali, Fitch, Reports on the Noxious Insects of N. York, iii. p. 8, no. 5°. 
Crypturgus mali, Zimm. Trans. Am. Ent. Soc. 1868, p. 143°. 
Monarthrum mali, Lec. Rhynch. N. Am. p. 349°. 
Pterocyclon mali, Bichh. Rat. Tom. p. 447 °. 
Pterocyclon longulum, Hichh. Berl. ent. Zeitschr. 1868, p. 278°. 
Hab. Norra America, Canada?, New York State 1, Southern States 2, Lake Superior 
to Florida ?.— Mexico 4.—ANTILLES, Cuba +. 
We have received no examples of this common North-American species from our 
region. It attacks apple-trees, and an account of its depredations is given by Schwarz 
[Proc. Ent. Soc. Wash. i. pp. 44, 48]. 
14. Pterocyclon cordatum, sp. n. 
Fem. Elongata, cylindrica, subnitida, fusca, prothoracis tertia parte basali testacea ; elytris flavo-testaceis, 
lateribus et apice infuscatis; antennarum clava subtriangulari, suturis curvatis, ciliata ; elytris punctatis, 
ad apicem oblique subabrupte declivibus, retusione subcirculari lateraliter et infra marginata, preter 
suturam vix impressa, utrinque bituberculata. 
Long. 2°5 millim. 
Female. Elongate, cylindrical, moderately shining. Head blackish, subconvex in front, shining near the 
vertex and in the middle line, punctured and dull towards the sides, mouth fringed ; antennze testaceous, 
the club subtriangular, the apex somewhat obtuse, the sutures curved, fringed with long hairs arising 
from the superior border and from the inner face of the basal joint. Prothorax more than one-fourth 
longer than broad, subcireularly rounded in front, the sides parallel behind the anterior third, the base 
truncate, the hind angles obtuse ; surface testaceous, gradually infuscate over the apical third, which is 
obliquely declivous and asperate, discal elevation absent, the posterior two-thirds minutely reticulate and 
obsoletely punctate. Scutellum rounded-triangular, fuscous. Elytra as wide as the prothorax and one- 
third longer, parallel-sided, truncate at base, with rounded-rectangular humeral angles, the apical margins 
seen from behind separately and strongly rounded and divaricate in the middle to form an obtuse sutural 
emargination ; surface cylindrical, obliquely and rather abruptly declivous behind, obscure testaceous- 
yellow, infuscate at the sides and apex, and finely but perceptibly lineato-punctate ; declivity subretuse, 
flattened, nearly circular, except for the inferior emargination, rounded above at the junction with 
the horizontal portion of the elytra, margined at the sides and apex but not acutely, opaque, shortly 
pilose, with two small tubercles on each side rather near the suture. Underside fuscous. Legs 
testaceous. 
Hab. Guatemata, Quiché Mountains (Champion). 
