250 BULLETIN 63;, UNITED STATES NATIONAL MUSEUM. 



pronotiim ; from the latter by the siibopa(j[iie integuments and shorter 

 and broader pronotiim, and it inhabits a different zoological region. 



General ohservations. — The mentiim is triangular, rounded at apex, 

 sometimes reflexed so as to appear truncate. The inflexed lobes are 

 moderate in size. Surface coarsely punctate and feebly convex cen- 

 trally, foveate laterally within the margins. The prosternum is 

 strongly arcuate antero-posteriorly between the coxae and strongly 

 protuberant yentrally with the coxse; triangular behind the equator 

 of the coxfe and vertically truncate, also compressed behind, with the 

 angle rounded or quite strongly mucronate; surface longitudinally 

 groo^'ed between the coxjie. 



Mesosternum quite vertical and more or less arcuate, broadly con- 

 cave. 



The abdominal process is subquadrate and noticeably transverse, 

 in width about equal to the length of the second segment ; the latter 

 is slightly longer than the post-coxal part of the first ; the third is a 

 little more than twice as long as the fourth, while the second is 

 about a third of its length longer than the third. 



The abdominal salient is about a fifth wider than the metasternal 

 salient. Metasternum laterally between the coxa) is scarcely as long 

 as the width of a mesofemur at base. 



The tibial grooves of the profemora are moderate in width and 

 slightly concave, floors glabrous; sides carinate, quite straight and 

 contiguous before the base; the anterior margin of each groove is 

 more or less dentately laminate at about the outer fourth. 



On the mesof emora the grooves are glabrous, with the floors quite 

 flat, the sides moderately cariniform, becoming evanescent at basal 

 fourth without becoming contiguous. Those of the metafemora are 

 similar but evanescent at basal third. 



The protibise are slightly compressed and carinate externally. The 

 tarsal grooves are more or less feeble, with their floors glabrous in 

 apical moiety; the articular cavities are more or less feebly open. 



The meso- and metatibia; are not carinate externally and the artic- 

 ular cavities are quite closed ; the external surfaces are flattened and 

 scarcely grooved, glabrous on the mesotibia*, subglabrous and obso- 

 letely sculptured on the metatibia\ 



The tarsi are moderately stout and somewhat elongate. 



The protarsi are about a third of their length shorter than a 

 mesotarsus. Joints' two, three, and four subequal, apparently just 

 a little wider than long and together about equal to the fifth; the 

 first is slightl}'' longer than wide. 



The mesotarsi are about one-eighth of their length shorter than 

 a metatarsus. Joints two, three, and four subequal, just a little longer 

 than Avide and together just a little longer than the fifth; the first is 

 scarcely as lonir as the third aud fourth combined. 



I 



