142 RHYNCHOPHORA. 
Oblong, somewhat shining, deep black. Head shortly rostrate; front with a median polished impunctate 
space extending between the eyes to the oral border; rostrum subimpressed and punctured at sides, 
with short pubescence; vertex dull. Antenne ferruginous, with club black ; funiculus and club fringed 
with long hairs. Prothorax a little longer than broad, the sides straight and subparallel to middle, 
thence obliquely rounded and slightly constricted to apex; surface impressed at apex on either side and 
along basal margin, with close longitudinal strige: separated by narrow interspaces, and replaced towards 
the apex by finer aviculation, median line fine, impunctate, not elevated. Scutellum punctiform, rugose. 
Elytra a little wider than the prothorax and not quite twice as long, their basal margins feebly rounded, 
elevated, and slightly everted, humeral elevations distinct, sides subparallel, apex circularly rounded ; 
punctate-striate, the strie well-marked but shallow, with round punctures, confluent and deeper on the 
declivity, interstices flat, with transverse wrinkles, especially at base, and an irregular series of very fine 
punctures, convex and narrowed towards apex, with but microscopic traces of any hairs. Underside 
black, not closely punctured, thinly hairy. Legs black; knees and tarsi reddish. 
Hab. GuateMALA, Cerro Zunil (Champion). 
A very well-marked little species, represented by four specimens in our collection. 
They show no sexual differences. 
Group HYLESINIDES. 
This group, in addition to novelties, comprises the Central-American genera of 
Chapuis’s subtribes Phloeotrypide, Hylesinide, and Phleotribide, with the exclusion of 
the Bothrosterni and Pycnarthrum (Nemobius, Chap.), and the addition of a genus of 
doubtful affinities, Problechilus, described as a 'Tomicid by Eichhoff. The group is 
here left as a whole, as no system of dividing it into subgroups has as yet proved 
capable of satisfactory definition without leaving out of account genera which are not 
yet known from our region. It may, however, be said that the genus Phiaoborus (and 
Phiwotrypes) appears to be nearly allied to Hylesinus, and not separable by characters 
of more than generic importance; that Hulytocerus, Phiwotribus, and some outside 
genera (Phiwophthorus, Dryotomus, Aricerus) form a close association, and that 
Problechilus stands apart, though presenting certain points of affinity with the latter 
association. 
Twelve genera are indicated from Central America. 
Antennal club compact. 
Funiculus seven-jointed. 
Anterior cox contiguous; club not compressed . . . . . . . .) . . ) ~Hylastes. 
Anterior cox not contiguous. | 
Third tarsal joint bilobed. 
Club long, acuminate, not much compressed. 
Species very large; abdominal segments 1-4 subequal . . . . . Phleoborus. 
Species moderate or small; abdominal segments 1, 2 longer than 3,4. Hylesinus. 
Club short, blunt at apex, compressed. . . . . . . . ws). ) . ©Dendrosinus. 
Third tarsal joint quite simple; club compressed, oval, with oblique sutures. Problechilus. 
