PHILONTHUS. All 
Structurally allied to the two preceding, this is nevertheless a very distinct species, 
and has much broader antenne, joints 5-10 being strongly transverse ; though, as in 
them, the head is narrowed behind, with the hind angles rounded and the eyes rather 
prominent. The thorax is straight at the sides. The elytra are sparingly and rather 
finely punctate; the scutellum a good deal more closely and coarsely punctured ; 
although the hind body is only sparingly punctate, its pubescence is remarkably 
conspicuous, and on its under face the punctuation is rather coarse and deep. 
Only a few examples have been found, but I appear to have the two sexes before me, 
for though all have the front feet simple, yet on comparison it is seen that there is an 
extremely slight emargination of the hind margin of the last ventral plate, which is no 
doubt indicative of the male sex. 
40. Philonthus idoneus. 
Elongatus, subdepressus, nigerrimus, nitidus; elytris abdomineque crebre vix fortiter punctatis, hoc evidenter 
setosello ; thorace suboblongo, posterius angustato. 
Long. 10 millim. 
Hab. Guatemata, El Tumbador 2500 feet (Champion). 
Antenne rather thicker externally, with joints 6-10 transverse, but not strongly so. 
Head subquadrate, not narrowed behind, but the eyes slightly prominent. Scutellum 
coarsely punctate. Elytra rather finely and not sparingly punctate. Hind body mode- 
rately closely and finely punctate, the pubescence well marked, and the two penultimate 
segments with very coarse hairs. 
Although very similar to P. hirtiventris, this is distinguished by good characters, the 
antenne being less stout, the thorax evidently narrowed behind, and the wing-cases 
more closely and finely punctate. The only example discovered is no doubt a male, for 
though the front: feet are quite simple, there is a slight emargination of the apical 
ventral segment. 
41. Philonthus rufopygus. (Tab. X. fig. 19.) 
Nigerrimus, nitidus, abdominis segmento ultimo rufo-testaceo; capite post oculos subangustato, antennis 
mediocriter latis ; elytris abdomineque parce punctatis, evidenter setosellis. 
Long. 8 millim. 
Hab. Panama, Bugaba (Champion). 
Antenne black, joints 6-7 transverse, but not strongly so. Thorax oblong, straight 
at the sides, a good deal narrower than the elytra. Scutellum rather finely punctate. 
Elytra only sparingly punctate, furnished, in addition to their scanty depressed pubes- 
cence, with four rows of fine distant erect sete. Hind body moderately closely punctate, 
very pubescent, and also with erect elongate sete; the last segment, as well as the 
terminal styles, bright reddish yellow. 
The front tarsi are simple in the male, and in that sex the head is broader, and 
3 GG 2 
