140 MEMOIRS ON THE COLEOPTERA 



fectly rectilinear; prothorax one-half wider than long, the sides 

 strongly rounded, converging anteriorly, the deep apical sinus some- 

 what prominent and arcuate at the middle; apical angles very acute, 

 the basal broadly rounded as usual in this section; punctures fine 

 but distinct, sparse, the intermingled coarse punctures laterad 

 distinctly setulose; scutellum very acute, pale; elytra a fourth longer 

 than wide, circularly rounded in apical half, barely at all wider than 

 the prothorax, black, brownish on the flanks, where there is a longi- 

 tudinal streak of flavate; on each, there is an oblique and posteriorly 

 pointed flavate spot very sharply defined at each side of the scutellum; 

 punctures strong, not close; two geminate series on each rather im- 

 pressed; pygidium, legs and entire under surface, flavate-brown, the 

 pygidium hairy; metasternum coarsely punctate throughout, except 

 before the hind coxae and in the median canaliculation; third and 

 fourth anterior tarsal joints strigilate at apex, the fifth obliquely 

 impressed beneath but not strigilate. Length (cf) 14.0 mm.; 

 width 6.7 mm. A single example without indication of locality but 

 in all probability the form designated by Burmeister as a variety of 

 signata under the name inconstans; its exact relationship with typical 

 signata I am unable to surmise; at any rate there is no tendency 

 whatever for the black maculation to spread on the elytra in mul- 

 tiplex *inconstans Burm. 



Pronotal vittae with their outer contour deeply sinuate at the middle; 

 female smaller than the male 5 



5 Form oblong-oval, moderately convex, shining, very pale flavate 

 throughout, the abdomen pale piceous; pubescence and setae of the 

 various parts nearly as in inconstans; head and clypeus rufous, the 

 occiput black; clypeus a little shorter and broader than in the 

 preceding but of the same general aspect, except that the apical part 

 (cf ) is more finely and densely chagrined and that the clypeal suture 

 is distinctly sinuate medially; prothorax of the same general form 

 and sculpture, except that the punctures are less distinct, slightly less 

 (cf ) to slightly more (9 ) than one-half wider than long, relatively 

 a little smaller in the female; elytra as in inconstans but with the 

 punctures rather smaller and feebler, not wider than the prothorax 

 (cf ) or but slightly so ( 9 ), each with three very minute black mark- 

 ings, the two near basal fourth short and slender lines, the inner 

 more oblique and one or both often wanting; the one behind the 

 middle minute, subtriangular and much less often wanting; lateral 

 swelling in the female moderate, its anterior tumor short, the external 

 sinus rather short and abruptly formed but not deep; neighboring 

 surface dark in color; metasternum partially punctate and setulose, 

 the setae shorter and stiffer in the female, its general surface mottled 

 by reason of the cellular structure showing through the pellucid 

 integument, giving a tessellated appearance. Male with the third 

 and fourth joints of the anterior tarsi strigilate at apex, the fifth 

 concave longitudinally beneath, the bottom of the concavity not 

 strigilate, the anterior wall dentate near the base. Length (cf 9 ) 

 12.5-14.5 mm.; width 6.5-6.8 mm. Isthmus of Panama (Colon and 

 Culebra) *beaumonti n. sp. 



