98 MALACODERMATA. 
related to the Eastern genus Jchthyurus. The absence of thickened femora in the male, 
and the different form of the apical plate of the abdomen, warrant its separation. One 
species has been found in Central America :— 
1. Trypherus forficulinus. (Tab. VI. fig. 7.) 
Nigro-piceus, nitidus ; fronte flava, elytrorum apicibus abdomineque supra rufo-testaceis ; abdominis segmento 
ultimo dorsali utrinque angulariter acuminato atque elevato, lobis nigris. Long. 103 millim. ¢? 
Hab. GuaTEMALA, Quiche Mountains (Champion). 
Head pitchy, pale yellow between the eyes; and the antenniferous tubers are of the 
same colour. Antenne fuscous, except at the point of insertion to the head; their 
third joint nearly twice as long as the second. Thorax of the same width as the head, 
its disk impunctate, margined by a fine line. Elytra one quarter the length of the 
abdomen, with two raised lines and a humeral costa; their apices rich orange or 
ferruginous red. Wings reaching nearly to the apex of the abdomen. Apical segment 
of the latter with two angular projecting points, which are elevated and a little slanting 
outwards and dark pitchy; in the angle formed between them the segment appears to 
be produced into a small angular lobe. T°. latipennis is described by Leconte as having 
the female with last dorsal segment trilobed at the tip. I am not certain of the sex of 
the single specimen here described. 
This is one of the most singular forms among the Coleoptera ; the superficial resem- 
blance to an earwig is not to be overlooked. 
LOBETUS. 
Lobetus, Kiesenw. Linn. Ent. vii. p. 244 (1852), nec Leconte, Trans. Ent. Soc. Amer. ix. p. 59. 
This most extraordinary genus is founded on a species, torticollis, from Venezuela. 
The insect which Leconte refers to it has the antenne alike in both sexes ; and notwith- 
standing Dr. Leconte’s remark that in his opinion this is a character of only specific 
importance, I believe, on the contrary, that, while the mode of distortion and number of 
joints so affected is not perhaps of itself of sufficient importance to warrant my forming 
a new genus for the species here described, yet the amorphic structure of the male 
antenna indicates some rudimentary form dependent on or correlated with the shortening 
of the elytra and the increase in the eyes, which are present, and is of the highest 
generic significance. At all events, the species here recorded shows more affinity with 
the type of Kiesenwetter’s genus than does L. abdominalis, which I feel it necessary to 
assign to a different genus. 
In Lobetus mirabilis it is not the ninth to eleventh joints, but every joint in the 
antennee which takes some remarkable form. This structure is fairly represented in 
Tab. VI. fig. 10; it is most difficult to apprehend, from the fact that the processes from 
each joint are so contorted that one cannot see them all separately at one view, or even 
count the number of joints with certainty. 
