IASIDES.—COLEOMERUS. 209 
IASIDES, gen. nov. 
Mandibles slightly emarginate on the inner side before the tip; rostrum cylindrical, nearly straight, slender, 
as long as the head and prothorax, the scrobes gradually descending ; head globose ; eyes large, narrowly 
separated above; prothorax long, conical, bisinuate at the base, the median lobe short and truncated ; 
scutellum small, rounded, sulcate; elytra long, a little wider than the prothorax, narrowing from the 
shoulders, which are armed with a small compressed prominence in front, the basal margin of each 
elytron separately rounded and sharply raised inwards; pygidium not visible; prosternum deeply sulcate : 
anterior coxse very narrowly, the others widely, separated ; mesosternal side-pieces largely developed ; 
ventral segments 1 and 2 long, connate ; legs moderately long; femora sublinear, unarmed, the posterior 
pair reaching the apex of the abdomen; tibie unguiculate ; tarsi with joint 3 strongly bilobed ; tarsal 
claws long, subconnate at the base; body subfusiform, convex, polished, almost bare. 
Type, L. cincticollis. 
The single species from Panama on which this genus is based has the rostrum, &c., 
formed as in the “ Nertides,” amongst which it can be included for the present; 
the anterior and intermediate tarsi, however, are not dilated as in Nertus, Trachy- 
meropsis, &c. 
1. Iasides cincticollis, sp.n. (Tab. XII. figg. 9, 9 a.) 
Moderately elongate, very shining, black; the prothorax with a narrow space across the base, the sterna, 
rostrum, and legs, and a small space at the sides of the ventral segments 3-5, clothed with hair-like 
white scales, the rest of the surface bare. Head foveate between the eyes; rostrum rugulosely punctate 
and carinate to near the tip, the antenne inserted just behind the middle, joint 2 of the funiculus nearly 
as long as 1, the club acuminate-ovate. Prothorax slightly longer than broad, faintly constricted towards 
the anterior margin, the base and apex very finely punctate, the rest of the upper surface smooth. Elytra 
with rows of minute punctures, the sutural and marginal striz sharply-defined, the others just traceable, 
the interstices smooth and flat. Beneath somewhat coarsely punctate, the ventral segments almost 
smooth, 1 shallowly depressed down the middle. 
Length 44, breadth 2 millim. (¢?) 
Hab. Panama, Bugaba (Champion). 
One specimen. 
Sect. D1ORYM@RIDES. 
Dyorwnérides (sic), Lacord. 
The two genera referred to this section by Lacordaire are both represented in Mexico 
or Central America, whence a third is now added. ‘They have the femora broadly 
sulcate beneath for the reception of the tibize in repose (thus differing from nearly 
all the Centrinides), and in some species of Diorymerus the anterior tibie are also 
hollowed for the reception of the tarsi. The rostral canal is broad and very deep, 
extending on to the anterior portion of the metasternum in Coleomerus. | 
COLEOMERUS. 
Coleomerus, Schénherr, Gen. Cure. ill. p. 817 (1836) ; Lacordaire, Gen, Col. vii. p. 218. 
The two described species of Coleomerus are from Cayenne and the Antilles 
respectively, and a third (from Cayenne) was noted by Lacordaire. Two others from 
BIOL. CENTR.-AMER., Coleopt., Vol. IV. Pt. 5, Judy 1907. 2EE 
