CONOTRACHELUS. 345 
4. Conotrachelus serratidens, sp. n. (Tab. XVIII. figg. 4, 40, 9; 44, 
anterior femur; 4 c, posterior femur.) 
Subovate, moderately shining, rufo-piceous, the rostrum often rufescent; the vestiture long, coarse: 
somewhat close, ferruginous or ochreous and whitish intermixed, that on the elytra subfasciculate and 
more or less alternating in colour on the different interstices; the femora each with a whitish ring 
a little beyond the middle. Head closely punctate, foveate between the eyes; rostrum (¢) rather 
slender, curved, depressed at the base above, nearly twice as long as the prothorax, 5-carinate in its 
basal two-thirds and thickly punctate thence to the apex, ( 2) longer, strongly curved, more slender, and 
almost smooth, the antenne inserted at about one-third from the apex in the ¢, and at or behind the 
middle in the 9, joints 1 and 2 of the funiculus equal in length. Prothorax transverse, rounded at the 
sides anteriorly and constricted and narrowed in front, the base strongly bisinuate ; coarsely, confluently 
punctate, carinate down the middle. LElytra subtriangular, the sides rounded posteriorly ; coarsely 
seriate-punctate, the interstices rather narrow, rugulose, 3,5, 7, and 9 costate, the ridge on 3 once or 
twice interrupted. Mesosternum flattened between the cox. Ventral segments shining, sparsely, 
minutely punctate. Femora clavate, each with a large, acute, triangular tooth, which is abruptly 
notched on its outer edge, the emargination limited externally by a narrew, straight tooth, the posterior 
pair with the larger tooth irregularly serrate. Tarsal claws with a long tooth. 
Length 51-62, breadth 23-34 millim. (¢ @.) 
Hab. Muxtico, Jalapa (//oge); British Honpuras, Rio Hondo, Rio Sarstoon 
(Blancaneaux); GUATEMALA, Chacoj in the Polochic Valley (Champion); Panama, 
David, Volcan de Chiriqui (Champion). 
Fourteen examples. Very like C. fulvescens, but distinguishable at once by the 
irregularly serrate posterior femoral tooth. C. diaconitus and C. lassulus, Boh., from 
Cuba, and C. porculeti and C. distinctus, Boh., from Brazil, are described as having a 
somewhat similar armature. C. serratidens is a more elongate insect than C. diaconitus. 
5. Conotrachelus truncatidens, sp.n. (Tab. XVIII. figg. 5, 2; 5a, anterior 
femur; 5 6, posterior femur.) 
Subovate, shining, rufo-piceous or ferruginous; the vestiture rather sparse and somewhat coarse, fulyous or 
ochreous, intermixed with whitish, longer on the prothorax, the whitish scales on the elytra confined to 
the raised alternate interstices and subfasciculate, the others condensed into a dense line down each of 
the intervening spaces, the femora with a whitish ring. Head squamose, closely, finely punctate ; 
rostrum rather slender, about half the length of the elytra, feebly curved, depressed at the base above, 
finely striate to about the middle, minutely and sparsely punctate beyond, the antenne inserted far 
before the apex, joints 1 and 2 of the funiculus elongate and subequal in length. Prothorax large, 
transverse, rounded at the sides anteriorly, constricted and narrowed in front, strongly bisinuate at the 
base; coarsely, rugosely punctate, with a stout median carina nearly reaching the base. Elytra about 
one-half wider than the prothorax, narrowing from a little below the humeri, which are rounded in 
front ; coarsely seriate-punctate, the punctures deep and rounded, the interstices rugulose, 3, 5, 7, and 
Y strongly costate, the ridge on 1 slightly depressed below the base. Intermediate coxe widely separated, 
the mesosternum flattened between them and bituberculate in front. Ventral segments sparsely, finely 
punctate. Femora strongly clavate, bidentate, the outer tooth narrow, the inner tooth obliquely 
truncated or feebly emarginate on the outer side at the tip. Tarsal claws with a long tooth. 
Length 61-64, breadth 31-3} millim. ( 9.) 
Hab. Mexico, Toxpam in Vera Cruz (Sal/é). 
‘wo specimens. Very like C. fulvescens, but with the femora sharply bidentate, 
the larger tooth obliquely truncate or emarginate on the outer side at the tip; the 
BIOL. CENTR.-AMER., Coleopt., Vol. IV. Pt. 4, June 1904. QVYY 
