662 PROCEEDINGS OF THE NATIONAL MUSEUM vol. in 



Amnestus trimaculatus, new species 



Plate figures 40, 84, 288 



Diagnosis. — Among the species with jBve marginal jiigal pegs, this 

 one is most easily identified by the impunctate outer half of the 

 exocorium. 



Description. — Color: Head, pronotum and scutellum dark red- 

 dish brown; coria and clavus yellowed, former with apical margin of 

 exocorium and subbasal spot and apex of clavus light to dark fuscous; 

 venter, in fully colored specunens, as dark as pronotum; legs and 

 labium j^ellowed. 



Male: Oval; widest behind middle. 



Head: Length more than three-fourths width, 0.43(0.39-0.46): 

 0.55(0.51-0.58); interocular wddth, 0.33(0.30-0.37); jugum with five 

 marginal pegs increasing in length apically; surface with broad shallow 

 punctures between eyes. Antennal segments: I, 0.12(0.11-0.16); 

 II, 0.03(0.03-0.04); III, 0.25(0.23-0.30); IV, 0.24(0.22-0.26); V, 0.26 

 (0.23-0,29). Labium reaching between middle coxae. Labial seg- 

 ments: I, 0.20(0.16-0.23); II, 0.29(0.26-0.31); III, 0.25(0.23-0.27); 

 IV, 0.20(0.20-0.22). 



Pronotum: Length ahnost thi-ee-fourths width, 0.96(0.75-1.13): 

 1.35(1.20-1.52); anterior margin shallowly concave; lateral margin 

 weakly concave on basal half; transverse impression obtusely im- 

 pressed, marked by row of close-set, elongate, coarse punctures; 

 anterior lobe moderately tumid, with two or three irreg-ular rows of 

 coarse punctures laterall}^ and subapicalh^, minutel}^ punctate along 

 midline and on center of calli; posterior lobe with scattered punctures 

 becoming finer posteriorly, umbones impunctate. 



Scutellum: Length tliree-fourths width, 0.49(0.45-0.56) :0. 65(0. 00- 

 0.73). 



Hemelytron: ]>.Iesocorium with few punctures apically; exocorium 

 impunctate on outer half. 



Propleuron: Prosternal carinae higher than labial II, ventral 

 margin concave (fig, 40), 



Legs: Anterior femur with unequally bifid spine ventrally on basal 

 third, with short, subapical tubercle on postero ventral m.argin; 

 anterior tibia obtusely angled ventraUy near middle; posterior femur 

 angled dorsally near apex, ventrall}^ with weakly curved, stout spine 

 (about tv.'0-thirds of femoral height) at apical fourth, 



Terminalia: Gonostyhis as illustrated (fig. 288). 



Length of body: 2.26(1.87-2.60). 



Female: Similar to male but lacking secondary sexiial modifications. 



Head: Length-v/idth ratio, 0.42(0.38-0.46) :0.55(0.52-0.62); inter- 

 ocular width, 0.31(0.30-0.34). Antennal segments: I, 0.13(0.12-0.15); 



