660 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.49. 



nearly twice as long as the third or fourth segments, which are sub- 

 equal in length. Pronotum slightly broader posteriorly than ante- 

 riorly, smooth and evenly rounded above, without sign of median or 

 lateral carinae; lateral lobes distinctly longer than high, the lower 

 margins broadly rounded, the posterior margin with a very broad 

 and shallow humeral sinus; the pronotal disk is sub truncate ante- 

 riorly and broadly rounded posteriorly; meso- and metanotum 

 together barely as long as the pronotum but equally as broad, the 

 lateral lobes extending downward as far as those of the pronotum, 

 the lower margins rounded. Legs long and slender, covered with 

 short hairs, or pile; femora unarmed above, beneath unarmed except 

 the posterior ones, which are sparsely armed on the lower inner 

 margin with five or six short stout spines, the outer margin unarmed 

 or armed with one or two spines; fore femora about one and one-half 



Fig. 3.— Diestrammena marmorata. Hind tibia and tarsus, outer side. <1 



times as long as the pronotum, armed on the posterior side only with j( 

 a long movable genicular spine; middle femora with a long movable } 

 genicular spine on each side; fore and middle tibiae unarmed above, 

 beneath armed with one or two movable spines besides the apical 

 ones; hind tibiae unarmed beneath, above armed on both margins 

 with short close-set spines of subequal length except one pair about 

 the apical fourth which are noticeably longer than the others (fig. 3) ; 

 the apical tenth or so of the hind tibiae has no spines except one pair 

 at the tip; apical calcars of the hind tibiae long, the upper inner one 

 about as long as the metatarsus, the upper outer one noticeably shorter 

 than the corresponding inner one, the middle inner calcar about one- 

 half as long as the upper inner one, the outer median one less than 

 half as long as the outer upper one; ventral pair of apical calcars equal 

 and short, about one-half as long as the outer median ones. Tarsi 

 slender, the segments imarmed except the posterior metatarsus which 



