70 RHYNCHOPHORA. 
base to three-fourths of the length, and the eighth for a short space on the middle, the 
ninth is also yellow on a short raised portion quite at the extremity. The femora are 
remarkable for the abrupt and great dilatation of the apical part as compared with the 
basal portion; each one bears a small sharp tooth. The tibize are compressed and 
sublaminate, somewhat thicker in the middle; the front one, on the inner margin about 
the middle of the length, with a sharp tooth. 
In the male the antenne are median in their insertion, the prorostrum is short and 
broad, much dilated towards the tip, deeply canaliculate for half its length; the 
abdomen vaguely depressed along the middle. 
In the female the antenne are inserted very near to the eyes, and the prothorax is a 
good deal shorter than it is in the male. 
Ten specimens. 
18. Brenthus quadrilineatus, sp. n. (Tab. III. fig. 6, 2 .) 
Niger, nitidus; elytris lineis duabus elongatis flavis, prope suturam striis duabus impunctatis, duabusque 
punctatis, externe seriatim punctatis. 
Long. 11-15 millim. 
Hab. Mexico, Toxpam (Sallé), Bobo (Hoge) ; Nicaracua, Chontales (Janson). 
This insect is very closely allied to B. clavipes, but may be distinguished from it by 
the elongate yellow line on the eighth interstice, and by the less obsolete punctures on 
the elytra. Besides this, it is a narrower insect, with the femora much less clavate, and 
the tooth on the front tibia less definite; the tibie, too, are less laminate. 
Four specimens. 
14. Brenthus sculptipennis, sp. n. 
Angustus, parum elongatus, niger; elytris linea et puncto flavis ornatis, fortius punctatis, interstitiis carinatis ; 
tibiis anticis intus haud dentatis. 
Long. 11-17 millim. 
Hab. Nicaracua, Chontales (Belt); Panama, Volcan de Chiriqui (Champion). 
Thorax much narrowed in front, with traces of an obsolete channel on the basal part. 
Elytra rather depressed, narrow, with a very short yellow mark near the apex of the 
third interstice, and with the fourth interstice yellow from the base to two-thirds of the 
length, this yellow colour at the base spreading a little at the sides; the sculpture is 
remarkably definite and coarse, the first stria is impunctate, the second and third are 
punctate, the outer striz are very coarsely punctured, so that the interstices are carinate. 
‘The front tibie are straighter than usual, and have no trace of a tooth on their inner 
edge. ‘The femora each bear a small sharp tooth; they are moderately clavate, the 
more slender part broadly impressed on the outer face. 
B. sculptipennis bears a considerable resemblance to the small individuals of B. meav- 
canus ; it is very distinct, however, not only by the absence of sulcation on the prothorax, 
