STENUS. 643 
5. Stenus graciliventris. (Tab. XVII. fig. 4.) 
Angustus, niger, subopacus, eneo-tinctus, breviter flavo-pubescente; palpis fusco-flavis, pedibus testaceis, 
antennis fusco-testaceis ; dense fortiterque punctatus, minus rugosus. 
Long. 33-4 millim. 
Hab. Guatemata, El Reposo 800 feet (Champion); Panama, Volcan de Chiriqui 
2000 to 3000 feet, Bugaba (Champion). 
Palpi very slender, elongate. Antenne rather long, the middle joint of the club 
quite as long as broad. Head as broad as the elytra, the eyes large, the interocular 
grooves very indistinct. Thorax slender, its greatest width just in front of the middle ; 
deeply, very densely punctured, and without channel. Elytra distinctly longer than 
the thorax; coarsely, very closely punctured, but not rugose. Hind body slender, 
rather finely and closely punctate; three basal segments with a long slender cusp in 
the middle. Legs elongate, quite slender. Male with the third and following ventral 
segments deplanate, and the penultimate segment more densely pubescent; terminal 
segment with a very narrow elongate excision. 
This little Stenus has the pubescence on the elytra, and even on the thorax, more 
distinct than its allies. We have received six examples—only one of them, a female, 
not in good preservation, being from Guatemala; this latter may prove, when the 
male is known, to be distinct, as the elytra appear slightly shorter and rather more 
coarsely sculptured. 
6. Stenus hostilis. 
Niger, eeneo-tinctus; palpis flavis, antennarum basi pedibusque testaceis, femoribus extrorsum fuscescentibus ; 
capite leviter excavato, simplice; prothorace elytrisque profundius fortiterque punctatis; abdomine dense 
punctato, brevissime pubescente. 
Long. 5 millim. 
Hab. Mexico (Truqui, Flohr), Cordova (Sallé, Hoge); GuateMaua, near the city, 
Cerro Zunil, Chiacam, San Gerdnimo (Champion); Panama, Volcan de Chiriqui 4000 
to 6000 feet (Champion). 
Antenne rather short. Head broad, the surface distinctly excavate between the eyes, 
but without grooves or carination. Thorax very densely and deeply punctured, with an 
indistinct depression on the disc. LElytra slightly longer than the thorax, deeply, 
densely, and coarsely punctate, the punctures to some extent confluent, so as to give 
rise to an intricate appearance. Hind body densely, rather finely sculptured. The male 
has the femora rather incrassate, the middle tibie very minutely mucronate inwardly at 
the apex, the fifth and sixth ventral plates depressed on their hinder half and emar- 
ginate behind, and the seventh segment with a broad but not deep emargination. 
Although so widely distributed, we have received only a small series. The head 
without grooves or carination and the dense abdominal punctuation are the chief 
characters of S. hostilis. 
4 NN 2 
