ACALLES.—EURHOPTUS. 479 
16. Acalles exaratus, sp. n. 
Oblong-ovate, shining, black, the antennz rufescent at the base, the legs in part rufo-piceous ; very sparsely 
clothed with narrow adpressed ochreous scales. Head and rostrum rugulosely punctate, the latter finely 
carinate down the centre and with the extreme tip only bare and smooth; antenne inserted at about 
the middle of the rostrum, joint 2 of the funiculus a little shorter than 1, the club ovate. Prothorax 
broad, transverse, abruptly narrowed and constricted in front; densely punctate, the narrow interspaces 
here and there raised and longitudinally confluent, the disc depressed and obsoletely carinate down the 
middle, and also longitudinally depressed towards the sides. Elytra convex, rotundato-ovate, not wider 
than the prothorax at the base; seriate-punctate, the interstices narrow, 3 and 5 strongly, and the 
others more feebly, granulato-costate, the outer ones granulate. Legs short and rather stout, the femora 
unarmed, the tibiew each a little widened below the base externally. 
Length 1,%,, breadth 11, millim. 
Hab. Guatemata, Cerro Zunil 4000 feet (Champion). 
One specimen. A very minute species, with the facies of a Rhyssomatus. There 
are no erect setz visible, the widely scattered scales being narrow, piliform, and 
adpressed. 
EURHOPTUS. 
Eurhoptus, Leconte, Proc. Am. Phil. Soc. xv. p. 245 (1876). 
Several Central-American species are referred to this genus, which is very closely 
related to Acalles. These insects have the ventral segments 2-4 very short, 1 and 2 
subconnate, and 1 usually excavate or with two very large smooth fovee *; the elytra 
oval and connate; the scutellum not visible; the metasternum very short, without 
visible episterna; and the tarsal claws very small and subapproximate. ‘The femora 
are sometimes toothed, and the tibie in & costatus and “. levipennis are much 
widened. The presence of a large depression or fovee on the first ventral segment is 
probably a character common to both sexes: in one species (£. caviventris) the fovewe 
are limited externally by a dense cluster of coarse ochreous scales, and in another 
(E. alticola) they are only just traceable. The various forms may be grouped 
thus :-— 
a. Tibiz rather narrow. 
a’. Femora unarmed. 
a”. First ventral segment excavate or foveate. . . . . . . + ~~ . Species 1-3. 
6”. First ventral segment not excavate or foveate. . . . . . « . « « Species 4. 
b’. Femora feebly dentate . . . 2... ee ee ee ee ee.) Species 5. 
b. Tibie broad. ww ee ee ee ee ee ee.) «Species 6, 7. 
1. Eurhoptus caviventris, sp.n. (Tab. XXIII. figg. 18, 18, b, 3.) 
Elliptic, shining, bronze-black, the antenne and tarsi ferruginous ; thickly clothed with rather coarse pale 
brownish scales, except upon a transverse space below the base of the elytra and on the apical declivity 
(which are almost bare), and also set with scattered, curled, oval, much larger, raised scales, these latter 
* These are wanting in the allied genera Parisacalles and Echinonotus, Faust. 
