MALACODERMATA. 337 
16. Colyphus gracilis. (Tab. XIII. fig. 19.) 
Plumbeo-niger, nitidus, parallelus ; ore epistomateque flavis, pedibus rufis, antennis tarsisque fuscis, illis subcla- 
vatis ; prothorace oblongo, lateribus parum ampliatis, disco leviter rugoso ; elytris tenuiter flavo limbatis, 
subrugose punctato-striatis. Long. 53 millim. 
Var. Pedibus fuscis, basi, geniculis tarsisque subtus testaceis. 
Hab. Payama, Volcan de Chiriqui 8000 feet (Champion). 
The essential characters by which this species may be known from its allies are its 
narrow form and almost clubbed antennz ; owing to the latter, it might almost as well 
be placed in Pecilochroa. The head is impressed between the eyes with a large fossa. 
The antenne are longer than the head and thorax together ; their last three joints form 
a sort of lax club, but the last joint but one is distinctly wider than the ninth. The 
head and thorax are only obsoletely punctured, but the latter is transversely wrinkled, 
its anterior constriction is very slightly marked, and the sides are scarcely wider than 
the front. The elytra have the punctuation very confluent, with the interstices irre- 
gular; they do not appear so “‘honey-combed” as in such species as C. nigriventris ; 
they are narrowly margined with yellow at the sides and apex; the thorax is, however, 
entirely leaden-black. Two specimens are all that have come under my notice; they 
differ only in the colour of the legs; the abdomen is black in both examples. 
| PCECILOCHROA (p. 145). 
2. Pecilochroa varia. 
Nigro-picea, nitida, crebre subrugose punctata; ore, antennis, palpis pedibusque luteis; elytris indistincte 
rubro variis. Long. 8 millim. 
Hab. Mexico, Juquila (Boucard, coll. Sallé). 
Head scarcely wider than the thorax; the labrum and the epistoma pilose, yellow ; 
distinctly but very confluently punctured above and between the eyes. ‘Thorax rather 
narrow and little widened, pilose, subrugosely punctate, the front margin piceous. 
Antenne not longer than the head and thorax together, distinctly clubbed ; clear yellow, 
as well as the palpi, which are formed as in Colyphus. Elytra clothed with depressed 
but irregular pilose hairs; punctuation close and subrugose, continued to the apex ; 
pitchy black, with a long basal spot, an indistinct fascia, and the subapical region very 
indeterminately, rufous. Legs entirely yellow. 
Even if this species should prove to vary in colour, the clubbed antenne, subrugose 
punctuation, and little dilated thorax should cause it to be recognized. 
One specimen. 
8. Pecilochroa plumbea. (Tab. XIII. fig. 11.) 
Plumbeo-niger ; capite prothoraceque rufis, illo basi, antennis, palporum et mandibulorum apicibus, tibiis tar- 
sisque, nigris ; femoribus rufis; abdomine eneo-micante. Long. 8 millim. 
Hab. Mexico, Juquila (Boucard, coll. Sallé). 
BIOL. CENTR.-AMER., Coleopt., Vol. ITI. Pt. 2, May 1886. 2X 
