STENUS. 647 
15. Stenus macilentus. 
Elongatus, angustulus, niger, subeeneo-tinctus, nitidus; palpis pedibusque testaceis, femoribus extrorsum sub- 
fuscescentibus ; capite medio anguste carinato; prothorace elytrisque dense fortiterque punctatis; ab- 
domine breviter albido-pubescente, segmentis basalibus dense fortiterque punctatis, apicalibus fere 
impunctatis. 
Long. 4 millim. 
Hab. GuatTema.a, near the city (Champion). 
Very closely allied to S. fauvelianus, but rather smaller, and with the elytral punc- 
tuation not at all rugose, the thoracic punctuation without the transverse rugosity seen 
in 8. fauvelianus; the palpi are not of a pallid flavous colour, the basal joints of the 
antennz are dark in colour, and the punctuation of the basal abdominal segments is 
rather greater, especially on the under surface. We have received five examples of 
the species. The male characters apparently are similar to those of S. fawvelianus. 
S. buccalis is similar in appearance to this species, but has the labrum differently 
formed. 
16. Stenus sobrinus. 
Angustulus, niger, subseneo-tinctus, nitidus; palpis pallide flavis, antennis pedibusque testaceis, illis cumque 
femoribus extrorsum fuscescentibus ; capite medio anguste carinato; prothorace elytrisque dense fortiter- 
que punctatis, illo transversim subrugoso ; abdomine obsolete punctato. 
Long. 4 millim. 
Hab. Panama, near the city (Champion). 
Very closely allied to S. fawvelianus and S. macilentus, but readily to be distin- 
guished from either by the abdominal punctuation, which, even on the basal segments, 
is obsolete. We have received only two female examples. 
17. Stenus solitarius. 
Angustulus, niger, nitidus ; palpis flavis, antennis pedibusque testaceis, illis clava fuscescente; capite latiore, 
medio anguste carinato ; prothorace elytrisque dense fortiterque punctatis ; abdomine fortiter punctato, 
apice parcius punctato. 
Long. 35 millim. 
Hab. Guatemaua, Cerro Zunil 4000 to 5000 feet (Champion). 
Closely allied to the preceding three species, but smaller than any of them; most 
similar to S. sobrinus, from which it differs by the coarse abdominal punctuation; the 
head is comparatively very broad on account of the large eyes; the punctuation of the 
thorax is excessively dense, but scarcely rugose, and that of the elytra is not at all 
rugose. We have received only one example; it is a male, and has the penultimate 
ventral segment broadly impressed along the middle and finely pubescent, with the 
lateral margins of the impression a little elevated; the preceding segment is deplanate 
on the middle of the hinder portion ; the terminal segment cannot be seen. 
