630 PROCEEDINGS OF THE NATIONAL MUSEUM vol. m 



Genus Amnestus Dallas 



Amnestus Dallas, 1851, p. 126. 



Magoa St&l, 1860, p. 13. 



Pachymeroides Signoret, 1880, p. vii. New synonymy. 



Diagnosis. — Because this is the only genus in the subfamily, it 

 can be recognized readily by any of the features pointed out above 

 for subfamily recognition. 



Description. — Small, 1.6-4.5; subparallel to oval; dorsum much 

 less convex than venter. 



Head: Strongly deflexed, wider than long; clypeus as long as or 

 longer than juga, with four apical, marginal pegs, except in A. 

 sexdentatus, new species, in which two additional pegs are present; 

 juga with four or five (rarely more) pegs marginally; ocelli well 

 developed, posterior to line connecting hind margins of eyes; primary 

 setigerous punctures usually eight in number (fig. 59) — two near 

 anterior margin of each eye and two on midline of jugum; jugum 

 ventrally and maxillary plate impunctate; antennae usually 5- 

 segmented (described as 4-segmented for Pachymeroides bolivari 

 Signoret, and available material of several species show occasional 

 individuals with four segments), II minute, III, IV, and V subequal; 

 bucculae well developed, about one-third length of labial I; labium 

 variable in length, reaching to middle of mesosternum or all the way 

 to sternite III, II compressed, without foliaceous lobe. 



Pronotum: Subquadrate to transverse; anterior margin feebly to 

 strongly concave; lateral margins subparallel on basal half converging 

 from base, broadly rounded on apical half, with submarginal row of 

 not more than twelve setigerous punctures; transverse impression 

 postmedian, weak to strong; posterior margin weakly convex, sinuate 

 laterally near umbones; anterior lobe usually distinctly tumid in 

 male, not so in female, variously punctate; posterior lobe punctate, 

 punctures becoming finer posteriorly. 



Scutellum: Triangular, wider than long, apex acute, not narrowed; 

 disc shining, coarsely punctate. 



Hemelytron: Corial areas well defined; membranal suture deeply 

 emarginate on inner half, lateral angle acute; clavus with three rows 

 of distinct punctures; mesocorium with two rows of punctures paral- 

 leling claval suture, variably punctured elsewhere; membrane hyaline 

 to faintly yellowed, comprising a third or more of hemelytral length, 

 surpassing apex of abdomen by one-half its length. 



Propleuron: Row of coarse punctures in depression; prosternal 

 carinae well-developed. 



Mesopleuron (fig. 113): Evaporatorium occupying entire area; 

 posterior margin entire, straight to moderately prolonged at postero- 

 lateral angle. 



