PHILONTHUS. 419 
61. Philonthus apiciventris. 
Rufus; capite cum antennis palpisque, therace, scutello, mesosterno abdominisque apice summo nigris; pedibus — 
cum coxis omnibus testaceis ; elytris abdomineque parcius punctatis. 
Long. 9 millim. 
Mas. Trochanteribus posterioribus spina tenue armatis. 
Hab. Mexico, Juquila (Hége). 
Only a single example is before me, and though it has a very great resemblance to 
Belonuchus formosus, it can be readily distinguished by the fact that only the apical 
ventral segment and the armature is black; the sexual characters are quite different 
too from those of B. formosus. The example is presumed to be a male on account of 
the armature of the trochanters, though there is no other evidence of its sex visible; 
this armature consists of a fine slender spine placed at the apex of the trochanter, 
projecting at an acute angle from the direction of the femur and very slightly curved 
upwards ; it is so slender that it may easily escape notice. 
The black colour on the breast being quite confined to the mesosternum, and leaving 
all the coxse clear yellow, may also readily escape notice, as it is concealed by the middle 
cox; the punctuation of the under face of the hind body is very much finer than in 
B. formosus. 
62. Philonthus oxyporinus. 
Rufus; capite cum antennis, thorace, scutello, mesosterno, coxis quatuer anterioribus abdominisque apice 
summo nigerrimis; elytris abdomineque parecius punctatis. 
Long. 13 millim. 
Hab. Mexico, Oaxaca (Hége). 
This is another of the numerous species having a great resemblance to Belonuchus 
formosus, and is apparently—for only a solitary female has been obtained—the largest 
of these species ; it has, however, only the armature and the hinder half of the terminal 
segment black, and the antenne are a little thicker towards the apex than in the allies; 
the labial and maxillary palpi are piceous, with the terminal joint of each yellow. The 
much larger size and the black cox readily distinguish the insect from P. apiciventris. 
It is possible that a knowledge of the male may show this to be near Belonuchus 
pollens; but I think it more probable it will prove to be an insect with peculiar 
trochanters rather than with spinose femora, as in this female the trochanters are large 
and prominent. 
63. Philonthus colon. 
Elongatus, nitidus, fulvo-rufus; capite cum antennis abdominisque segmentis duobus ultimis nigris, palpis 
piceis; elytris abdomineque parce punctatis. 
Long. 11-13 millim. 
Mas. Trochanteribus posterioribus acuminato-prolongatis, femoribus basi tenuiore ; abdominis segmento ultimo 
ventrali producto, apice angulariter emarginato, 
Hab. Mexico, Cordova (Sadlé). 
3 HH 2 
