MACROPTATUS.— PSEUDOPTATUS. 187 
sulcus, the anterior cox well-separated, the mandibles emarginate within (bidentate 
when viewed from the side), the rostrum long, curved, and crenulate beneath, the 
femora clavate and sharply dentate, the anterior tarsi greatly dilated, the tarsal claws 
connate at the base. The type, kindly communicated by Dr. Heller, is doubtless of 
the male sex, it having the first ventral segment excavate down the middle. 
1. Macroptatus championi. (Tab. XI. figg. 7, 7 a.) 
Macroptatus championi, Heller, Stett. ent. Zeit. 1906, p. 48°. 
Hab. Costa Rica, Turrialba (dus. Dresden"). 
PSEUDOPTATUS, gen. nov. 
Head convex, small; eyes rather small and depressed. Mandibles short, blunt at the tip, toothed on their inner 
edge ; rostrum arcuate, longer than the head and prothorax, stout, tapering outwards in the 9 , the scrobes 
rapidly descending, the antenne inserted at (¢) or behind (? ) the middle, joints 2-7 of the funiculus 
gradually widening, 1 nearly twice as long as 2, the club stout and ovate; prothorax transversely convex, 
bisinuate at the base and apex, the anterior portion short, narrow, and tubulate, with well-developed 
ocular lobes; scutellum small, hidden by narrow scales; elytra broad, triangular; pygidium not visible ; 
prosternum unarmed in the d, declivous in front, with a narrow median sulcus, depressed between the 
cox; metathoracic episterna very broad; anterior coxe very narrowly, the others widely, separated ; 
femora gradually widening outwards, abruptly excavate near the apex, shallowly sulcate beneath and 
armed with two or three minute teeth; tibiz strongly and acutely dilated on the outer edge near the 
base and at the apex; anterior tarsi similar in the two sexes; tarsal claws connate at the base; body 
convex, rhomboidal, rugose, clothed with minute, scattered, hair-like scales. 
This genus includes a single species from Mexico, and is easily recognizable by the 
exteriorly bidentate tibiz. It is nearly related to Optatus. The sexual characters of 
the male are very peculiar. | 
1. Pseudoptatus dentipes, sp. n. (Tab. XI. fig. 8, 8a, d, 3.) 
Robust, opaque, black, the antennx, rostrum, and legs in great part ferruginous; the vestiture fulvous, very 
sparse, the scutellar cavity with a dense cluster of coarser, hair-like, ochreous scales; the entire surface, 
the legs and rostrum included, coarsely, densely punctate. Prothorax with the sides rounded and rapidly 
converging from the base to the anterior lobe. Elytra with densely-packed rows of coarse oblong 
punctures separated by narrow raised lines, the strie faint and only visible when the insect is viewed 
from the side. Legs rather stout, moderately long, the posterior femora about reaching the apex of the 
abdomen. 
3. Rostrum tuberculate on each side at the apex beneath, rugose to the tip; metasternum and first ventral 
segment very broadly depressed down the middle, the second segment with a line of dense, erect, curled, 
ochreous hairs extending across the median third before the middle. 
2. Rostrum unarmed, not so stout, the apical half more slender and sparsely punctate. 
Length 5-54, breadth 33 millim. (¢ 2.) 
Hab. Mexico, Cuernavaca (Sailé), Chilpancingo (H. H. Smith). 
Three specimens—two males and one female. 
oBB2 
