EXOPHTHALMUS., 955 
the elytral interstices uniformly flattened or the third very slightly raised anteriorly ; 
they are very like /. margaritaceus, which has an obsoletely carinate rostrum and less 
prominent eyes. ‘The specimen figured on our Plate has been compared with the 
type in the Sommer collection, kindly lent by Mr. O. E. Janson. 
7. Exophthalmus margaritaceus, sp.n. (Tab. XI. fig. 9, 3.) 
Oblong, black, densely squamose, the scales on the prothorax, scutellum, elytra, and part of the under surface 
bluish-white, those on the head, rostrum, legs, and last three ventral segments cupreous or opalescent ; 
the surface also set with short, scattered, minute, adpressed hairs. Head and rostrum rugulosely 
punctate, the rostrum considerably longer than the head and with a smooth median line, followed by an 
oblong, narrow, inter-ocular fovea, the nasal plate short ; eyes very large, moderately convex; antenn 
rather slender, the scape extending to just beyond the eyes. Prothorax strongly transverse, feebly 
bisinuate at the base, arcuately narrowing from the middle forwards, faintly canaliculate; with scattered 
irregular foveiform punctures intermixed with a fine interstitial punctuation. Scutellum rather large. 
Elytra elongate-triangular, the apices divergent and mucronate, the humeri prominent; with rows of 
small conspicuous punctures placed in shallow foveze, the two supplementary strie placed between 
5 and 6, the interstices feebly convex. Anterior tibiz strongly, and the intermediate pair feebly, 
unguiculate. 
Length 12-13, breadth 4-4} millim. (<¢.) 
Hab, Nicaragua, Chontales (Lelt). 
Two specimens. This species approaches /. opulentus, but it has more prominent 
humeri, the seriate punctures on the elytra conspicuous, and the vestiture uniformly 
bluish-white above, except on the head, where it is cupreous. ‘The obsoletely carinate 
rostrum and the less convex eyes separate /. margaritaceus from the variety of 
E. carinirostris with flattened elytral interstices. 
8. Exophthalmus albidus, sp.n. (Tab. XI. figg. 10, 10a, ¢.) 
Diaprepes albidus, Sturm, in litt. 
Oblong, black, densely clothed with chalky-white scales, and also set with short, scattered, minute, adpressed 
hairs. Rostrum longer than the head, flattened above, shallowly sulcate on each side and subcarinate 
down the middle, the carina followed by a short inter-ocular groove and extending forward to the long, 
shining, triangular subapical plate; eyes large, rounded, convex; antennal scape extending to a little 
beyond the eyes. Prothorax nearly as long as broad (along the median line), narrowed anteriorly, feebly 
bisinuate at the base, slightly depressed down the middle, with scattered foveiform impressions intermixed 
with the fine interstitial punctures covered by the vestiture. Scutellum rather large. Elytra elongate- 
triangular, the apices divergent, the humeri prominent ; with rows of conspicuous punctures, the two 
supplementary strize placed between 7 and 8, the interstices almost flat. Anterior and intermediate 
tibie feebly unguiculate. 
Length 143, breadth 53 millim. (¢.) 
Hab. Mexico (Sallé, ex coll. Sturm). 
One specimen. Very near the Nicaraguan LL. margaritaceus, but differing from it 
in the slightly smaller and more prominent eyes, the longer glabrous subapical portion 
of the rostrum, the less transverse prothorax, the position of the supplementary strie, 
and the uniform chalky-white vestiture. Diaprepes is here restricted to forms having 
well-developed vibrisse. 
