CONOTRACHELUS. 44] 
semierect setee. Head densely punctate, the front transversely depressed, and sometimes with a short 
median carina and a small prominence on each side of it; rostrum moderately stout, arcuate, about as 
long as the prothorax, a little longer in the 2, shining, 5-carinate in both sexes, sparsely punctate at the 
tip, the antenne inserted towards the apex, joint 2 of the funiculus a little longer than 1. Prothorax 
transverse, abruptly narrowed and constricted in front, deeply bisinuate at the base, the sides crenulate ; 
densely, rugulosely punctate, the narrow interspaces here and there obliquely raised or granulate, the disc 
finely carinate and usually with four conspicuous prominences about the middle. Elytra subcordate, 
about one-half wider than the prothorax, deeply sinuate in front; seriate-punctate, the interstices faintly 
granulate, 3, 5, 7, and 9 costate, 10 also carinate at the base, the ridge on 3 sometimes depressed or 
interrupted anteriorly. Intermediate coxe widely separated. Mesosternum smooth and concave, pro- 
tuberant on each side in front. Metasternum short, deeply hollowed and smooth in the middle, the 
cavity nearly reaching the apex in the 2. Ventral segments sparsely, coarsely punctate. Legs stout 
and rugose; femora clavate, unidentate ; anterior tibie sinuate within ; tarsal claws with a short tooth. 
Length 4-53, breadth 21-31 millim. (¢ @.) 
Hab. Mexico, Teapa (H. H. Smith); Guatemaua, Volcan de Atitlan, Panzos (Cham- 
pion); Nicaragua, Chontales (Janson); Costa Rica (Biolley, in Mus. Brit.); Panama, 
Bugaba, Volcan de Chiriqui (Champion). 
Many specimens. In two of those from Chiriqui the femora have a very small 
additional prominence, and in another the tooth on the anterior pair is almost obsolete. 
This insect is extremely like C. sguamifrons, but is readily separable by the excavate 
meso- and metasternum, and the longer second joint of the funiculus. The less elongate 
shape, the closer vestiture, the less rounded sides and finer sculpture of the prothorax, 
&c., distinguish it from the nearly allied C. costiferus. 
183. Conotrachelus leucocephalus, sp. n. 
Very like C. planifrons, but with a dense whitish frontal patch (as in C’ verticalis); the rostrum of the ? 
flattened down the middle (not carinate) ; the sete very short and inconspicuous. 
Length 4-6, breadth 23-3}, millim. (6 Q.) 
Hab. Mexico, Toxpam (Sallé); Guatemata, Cerro Zunil, Purula (Champion). 
Four specimens from Mexico and four from Guatemala, those from the northern 
localities having the vestiture more mottled than in the others. The frontal patch 
sometimes has a rosy-red tinge. In the largest female, from Purula, the rostrum is 
depressed down the middle and sharply bicarinate on each side. 
184. Conotrachelus carinifrons, sp. n. 
Subovate, moderately shining, black, usually more or less mottled with ferruginous ; the vestiture fine, close 
above, very sparse beneath, rusty-red or fulvous, the prothorax with a condensed, bright, rusty-red, 
oblique vitta on each side of the disc, the two vitte nearly meeting in front and extending backwards 
on to the humeri, the head with a condensed rusty-red patch in front, the femora annulate, the anterior 
pair with a fulvous line along their basal half above ; the upper surface and legs also set with numerous 
short, semierect, pallid setw. Head densely punctate, transversely depressed, carinate, and feebly 
binodose in front; rostrum stout, curved, as long as or longer than the head and prothorax, seriate- 
punctate and tricarinate, sparsely punctured at the tip, the antenne inserted towards the apex, joints 
1 and 2 of the funiculus equal in length. Prothorax transverse, abruptly narrowed and constricted in 
front, moderately bisinuate at the base ; densely, rugulosely punctate, and sharply carinate anteriorly. 
BIOL. CENTR.-AMER., Coleopt., Vol. LV. Pt. 4, January 1905. 3 LL 
