644 STAPHYLINIDA. 
7. Stenus mexicanus. 
Niger ; palpis flavis, pedibus testaceis, femoribus extrorsum fuscis, antennarum basi rufescente; capite medio 
levigato, subcarinato ; prothorace elytrisque dense profundeque punctatis; abdomine crebrius subtiliter, 
obsolete punctato. 
Long. 5 millim. 
Hab. Mexico, Cordova (Hége), Las Vigas (Flohr). 
We have received only two, badly preserved, female examples of this species, which 
seems to be very similar to S. hostilis, though it will be readily distinguished from that - 
insect by the smooth shining space along the middle of the head. 
8. Stenus nimborum. 
Sat elongatus, niger, subnitidus; palpis pedibusque fusco-rufis; dense fortiterque punctatus, vix rugosus; 
elytris quam prothorax paullo longioribus, hoc disco foveolato. 
Long. vix 4 millim. 
Hab. GuateMata, Quiche Mountains 7000 to 9000 feet (Champion). 
Antenne rather short, the middle joint of the club slightly longer than broad. Palpi 
sordid testaceous, the outer joint more infuscate. Head scarcely so broad as the elytra, 
densely rather coarsely sculptured, not excavate between the eyes; interocular grooves 
vague, separated by a broad indistinct interval. Thorax distinctly dilated in the middle, 
densely, deeply, and coarsely punctured, without channel, but with an indistinct fovea 
on the disc. FElytra distinctly longer than the thorax, closely and coarsely punctured, 
the punctuation externally slightly intricate or confluent near the middle; one or two 
of the intervals are sufficiently broad to be shining. Hind body rather densely and 
coarsely punctured, with a single cusp in the middle of the base of each segment. 
Legs sordid red, darker externally, so that the tarsi are nearly black. Male with the 
penultimate ventral segment depressed along the middle and emarginate behind, the 
terminal segment feebly emarginate. 
An obscure species allied to the European S. providus. One example. 
9, Stenus mucronatus. 
Niger, sat nitidus, subeeneo-tinctus ; palpis flavis, pedibus antennisque sordide testaceis, his clava fusca; capite, 
prothorace elytrisque dense fortiterque rugoso-punctatis ; abdomine parce obsoleteque punctato, parce 
minus breviter pubescente. 
Long. 6 millim. 
Hab. Panama, Pefia Blanca 3000 to 4000 feet (Champion). 
Palpi elongate, flavescent, scarcely infuscate. Antenne only moderately long, the 
middle joint of the club scarcely so long as broad. Head broad, a little narrower than 
the elytra; ocular grooves rather indistinct, widely separated from the eyes, but sepa- 
rated inter se only by a narrow subcarinate space. Thorax subglobose, deeply and 
coarsely rugose-punctate, not channelled. Elytra short, just perceptibly longer than the 
