676 STAPHYLINIDZ. 
a punctate groove close to the front margin, and behind this another groove extending 
completely across; behind the middle is a third groove, interrupted on the disc; the 
base depressed and punctate in front of the hind margin. 
This insect is closely allied to the Amazonian VM. spinosus, but smaller, with smaller 
eyes, a less uneven surface of the head, and the grooves of the thorax not so wide 
though more distinctly punctured. Erichson’s WM. cephalotes is probably another allied 
species, although in his figure the tarsi are represented with a different structure. 
We have received only one example from each locality; the one from Mexico differs 
a little from the Panama type. 
21. Megalops puncticeps. (Tab. XVII. fig. 25.) 
Nigerrimus, nitidus ; pedibus antennisque flavis, his extrorsum fuscis ; capite numerose punctato ; prothorace 
punctato-sulcato ; elytris striola curvata impressa. 
Long. 34 millim. 
Hab. Guatemaua, near the city (Champion). 
Though closely allied to VM. incultus and M. spinosus, this insect is readily distin- 
guished by the surface of the head being less uneven, but covered with numerous, large, 
definite punctures ; the punctures in the thoracic grooves are also much more con- 
spicuous. The sex of the unique example is uncertain ; it is probably a female. 
22. Megalops impressus. 
Megalops impressus, Sharp, Trans. Ent. Soc. Lond. 1876, p. 380°. 
Hab. Panama, Tolé (Champion).—Sovutn America, Amazons valley ?. 
Our single example, though not perfectly agreeing with the unique Amazonian type, 
is not sufficiently different to warrant its separation. From MM. puncticeps, to which it 
is closely allied, it differs by the rather smaller eyes, which are separated by a larger 
space, and by this space being rather more uneven and less definitely punctured ; the 
thorax is broader, its grooves less distinct, its punctuation more developed. 
Subfam. OXY PORINAL. 
OXYPORUS. 
Oxyporus, Fabricius, Ent. Syst. p. 267 (1792) ; Erichson, Gen. et Spec. Staph. p. 555 ; Leconte, 
Tr. Am. Ent. Soc. vi. p. 214, 
This genus comprises about twenty-four species, distributed in North America, 
Europe, Siberia, and Japan. The occurrence of two species, though both peculiar to it, 
in our region, is one of the more important of the facts that prove some considerable 
resemblance between the Mexican and North-American faune. 
