NICENTRUS.—ODONTOCORYNUS. 317 
broad, rounded at the sides anteriorly, feebly constricted in front; densely punctate, with an incomplete, 
smooth, raised, median line. Elytra long, a little wider than the prothorax, subparallel in their basal 
half; deeply punctate-striate, the interstices narrow, uniseriate-punctate. Beneath densely punctate. 
Prosternum sulcate. First ventral segment sulcate down the middle in the ¢. Legs rather long and 
slender ; anterior femora at the apex behind, and the intermediate pair at the apex in front, produced 
into a short tooth. 
Length 23-3, breadth 3-14 millim. (¢ 2.) 
Hab. Guatemaa, San Juan and Sabo in Vera Paz (Champion). 
A pair from San Juan and a female from Sabo, A narrow, elongate form, with the 
rostrum less curved, longer, smoother, and more slender in the female than in the 
male; the elytra subparallel in their basal half, with deeply impressed strize and 
Marrow uniseriate-punctate interstices; the anterior and intermediate femora acutely 
produced at the tip beneath; the vestiture rather sparse above. Narrower than 
N. lobatus, the elytral vestiture not condensed into patches, the strie not so deep, the 
interstices more rugose. 
ODONTOCORYNUS. 
Odontocorynus, Schouherr, Gen. Cure. vii. 1, p. 271 (1844) ; Lacordaire, Gen. Col. vii. p. 228. 
Centrinus, subgenus X., Casey, Ann. N. York Acad. Sci. vi. pp. 574, 577. 
This genus is sunk by Casey as a section of Centrinus (= Gereus), but it is convenient 
to retain the name, the various species belonging to Odontocorynus—ail of which 
inhabit Mexico or the United States—having very peculiarly formed antenne in the 
male sex. The type, O. creyerus, Boh., and the two species now added, are more 
elongate than O. scutellum-album (Say), O. larvatus (Boh.), and their allies, and have 
the pygidium completely covered by the elytra. The prosternum of the male is without 
tubercles or spines in front of the coxe, but in O. creperus and O. latiscapus there is a 
spiniform pencil of hairs between them (as in Pseudorhianus impressus), and in these 
species, too, the anterior tarsi are dilated. ‘The Mexican forms may be tabulated thus :— 
a. Pygidium completely covered by the elytra: body oblong. 
a’. Scutellum albo-squamose, the rest of the vestiture of the upper surface 
sparse ; prosternum sulcate and bicarinate. ~ 
a’, Antennal scape (¢) widened at the apex only. . . . . . «~~ ereperus, Boh. 
67, Antennal scape (3) widened from about the middle. . . . . . Jdatiscapus, n. sp. 
b'. Scutellum, a median line on the prothorax, and the elytral suture 
ochreo-squamose; prosternum hollowed down the middle, not carinate. sutwra-flava, n. sp. 
b. Pygidium slightly exposed at the tip: body rhomboid-ovate, the elytra 
with closely-set vestiture 2. 2. 6. 2 2. 1 see ee ew eh ) CLarvatus, Boh. 
1. Odontocorynus creperus. (‘Tab. XVI. figg. 31, 31a, d, 3.) 
3. Odontocorynus creperus, Boh. in Schénh. Gen. Cure. viii. 1, p. 271". 
Baris alboscutellatus, Sturm, in litt.” 
_g, Antenne with the scape dilated at the apex only (as in the 2), the four outer joints of the funiculus 
