186 RHYNCHOPHORA. 
2. Optatus inornatus, sp. n. 
Oblong-rhomboidal, black; above rather sparsely, beneath densely, clothed with minute fulvous scales. Head 
rugulosely punctate ; rostrum closely punctate, laterally sulcate in its basal half. Prothorax transverse, 
~ conical, constricted in front, somewhat convex; densely, finely, confluently punctate, the narrow inter- 
spaces obliquely raised, and with a smooth, raised, median line. Elytra finely punctate-striate, the 
interstices transversely rugose and almost flat. Beneath closely punctate ; ventral segments 1 and 2 
broadly excavate down the middle ; prosternal sulcus shallow, the lateral carine not prominent. Femora 
acutely dentate. ‘Tibise more or less sinuous. Anterior tarsi clothed with long, projecting hairs, joints 2 
and 3 very broadly, and 1 moderately, dilated. 
Length 8, breadth 43 millim. (¢.) 
Hab. Guatemata (Sallé). 
One male, partially abraded above. This is the Guatemalan representative of the 
Mexican O. palmaris: the red markings are entirely wanting, above and beneath ; the 
prosternal sulcus is shallower; the tibie are more sinuate; and the first joint of 
the anterior tarsi is less dilated. The prothorax is obliquely strigose and the elytral 
interstices transversely rugose. 
8. Optatus fasciculosus, sp.n. (Tab. XI. figg. 6, 6a, 3.) 
Rhomboidal, shining, black or piceous; the depressions of the surface, above and beneath, set with small 
fascicles of narrow, adpressed, ochreous or whitish scales, the legs also clothed with similar scales. Head 
rugulosely punctate, shallowly foveate between the eyes; rostrum closely punctate and laterally sulcate, 
smoother in the 2. Prothorax transversely conical, constricted in front ; coarsely, obliquely strigose— 
the raised interspaces smooth and irregular, the depressions confluently punctate,—and with a smooth 
median ridge. Elytra deeply punctate-striate, the interstices more or less convex, vermiculate—the 
depressions transverse and here and there confluent, the raised portions smooth and bare. Beneath 
closely punctate; prosternal sulcus shallow ; ventral segments 1 and 2 broadly excavate down the middle 
in the ¢. Femora sharply dentate. 
$. Rostrum with a small tubercle in the centre at the apex beneath. Anterior tarsi with joints 1-3 very 
. broadly dilated and set with long, projecting hairs. 
Length 53-81, breadth 35-5 millim. (¢ @.) 
Hab. Mexico, Toxpam in Vera Cruz (Sallé), Cerro de Plumas (/dége); GUATEMALA, 
Zapote (Chanrpion) ; Costa Rica (coll. Solari), Santa Clara, San José, and San Carlos 
(Biolley). 
The vermiculate sculpture, the fasciculate arrangement of the scales, and the 
tuberculate apex of the rostrum of the male readily separate O. fasciculosus from its 
allies. It is found on Anonis sguamosa, according to Prof. Biolley, to whom we are 
indebted for four specimens. 
| MACROPTATUS. 
Macroptatus, Heller, Stett. ent. Zeit. 1906, pp. 46, 47. 
_ This genus is based upon a remarkable insect from Costa Rica, one of the finest 
Barids known as yet, of broad, rhomboidal form, flattened above, with the metasternum 
strongly protuberant in front, the prosternum unarmed and with a narrow median 
