492 PROCEEDINGS OF THE NATIONAL MUSEUM. toi,.47. 



one on each side of the deep median sulcus; occiput with a pair of 

 tubercles very slightly larger than the others, one on each side of the 

 median sulcus. Antennae heavy and basally flattened, especially the 

 basal segment, wliich is barely longer than broad. Pronotum quad- 

 rate and covered with large tubercles, four, situated two on each side 

 of the median line on the anterior half, somewhat larger than the 

 others; just anterior of the middle of the pronotum is a deep trans- 

 verse furrow and near the anterior border is a second shorter one. 

 There is a pair of shallow posteriorly divergent furrows on the posterior 

 part of the pronotal disk. Mesothorax about twice as long as the 

 anterior width, the width noticably and gradually increasing from the 

 front backwards; surface of mesonotum covered with large rounded 

 tubercles, less elevated than those of the pronotum. Metanotum 

 transverse, the surface covered witli tubercles similar to those on the 

 mesonotum. Median segment about twice as long as the metanotum 

 and, like it, covered with bluntly rounded tubercles. Abdomen also 

 covered with rounded tubercles, the segments very slightly longer 

 than broad, the fourth, fifth, and sixth ones more distinctly so ; oper- 

 culum falling short of the end of the abdomen, barely exceeding the 

 apex of the eighth segment, apically terminated by a short, blunt pro- 

 jection; cerci short and heavy. 



Elytra present as small apically rounded lobes, broader than long 

 and not reaching the posterior margin of the metanotum; wings 

 immovable, fossil-like plates, their apical margin broadly rounded 

 and coincident with that of the posterior margin of the metanotum. 



Legs short, broad and heavy, all the femora broadly flattened and 

 the margins, especially the lower margins of the middle and liind ones, 

 undulately toothed or tuberculate; fore femora with the basal curve 

 terminating two-thirds the distance from the base; middle femora 

 but twice as long as broad, the hind ones about four times as long as 

 broad. Tibiae somewhat flattened and more or less distinctly undu- 

 late above. Tarsi heavy, and as long as the tibiae, the anterior ones a 

 little longer. All the legs are covered wdth tubercles similar to, but 

 smaller than, those that cover the rest of the insect. 



General color brownish with the tubercles mostly ash-colored, 

 especially those on the head and pronotum; eyes dark brown; there 

 is some black on the occiput and on the front part of the pronotum; 

 some of the segments of the antennae are darkened basally, giving it a 

 ringed appearance; the tibiae are variegated with blackish and the 

 hind and middle femora are black on the inner face. 



Measurements: Length, entire insect, 63 mm.; pronotum, 4; meso- 

 notum, 8; metanotum, 2; fore femora, 7; middle femora, 5; hind 

 femora, 8; width, head, 5; middle femora, 2.5. 



Type.—^&t. No. 18242, U.S.N.M. 



The type is unique. 



