512 



PROCEEDINGS OF THE NATIONAL MUSEUM. 



VOL. XXIX. 



very distinct, the cephalic lialf distinctly inflated, lateral margins dis- 

 tinctly elevated, and mesad with distinct subparallel depressions; longi- 

 tudinal median sulcus faintly impressed on cephalic half, absent on 

 caudal. Tegmina about two and a half times the length of the prono- 

 tum, broad, the "shoulder" angles narrowly rounded; caudal margins 

 obliquely rotundato-eraarginate toward the median line. Exposed 

 portions of the wings about equal to the length of the pronotum prox- 

 imad, as broad as caudal margin of the tegmina, evenl}^ rounded, with 

 the tips rather narrowly truncate. Abdomen distinctly expanded 

 mesad; three proximal segments with continuous lateral plica?, which 

 are very faint on the first and increase gradually in size distad, termi- 

 nating abruptly in a large thickened mass on the third segment; dorsal 

 and lateral margins of all segments except the 

 vv^ ,2 proximal one supplied with series of small, 



\ /' bead-like tubercles, which are subobsolete on 



the median portions of the distal segments but 

 quite distinct laterad; anal segment transverse, 

 twice as broad as long, strongly depressed 

 mesad with a distinct longitudinal sulcus at the 

 bottom of the depression, which is anchor 

 shaped, spreading out distad, and embracing 

 two distinct prominences, caudal margin trun- 

 cate, surface of the plate with numerous rasp- 

 like tubercles; subgenital plate transverse, 

 about twice as wide as long, the caudal margin 

 moderately arcuate; pygidium rectangulate, 

 the distal margin truncate, a distinct median 

 longitudinal sulcus present. Forceps elongate, 

 but slightly shorter than the combined length 

 of the pronotum, tegmina, and exposed por- 

 tions of the wings, rounded dorsad, flattened 

 ventrad, moderately straight in the basal half 

 or slightly less (the left arm considerably ex- 

 ceeding the right in length), armed at this point 

 with a short thick tooth on the ventral portion of the internal face, 

 distal section of the forceps evenly arcuate, .the longer left arm slightly 

 hooked distad; surface of the forceps covered with evenly distributed 

 asperities, those of the ventral surface minute. Limbs rather slender; 

 femora hardly inflated; second and third joints of the caudal tibia3 

 together hardly exceeding the proximal in length ; second joint strongly 

 compressed proximad, third joint strongly depressed, elliptical, no 

 arolia present. 



General color seal brown, becoming burnt umber on the forceps and 

 touched with ochraceous on the limbs; exposed portions of the wings 

 ochraceous, with the lateral margins marked with the general color. 



Fig. 8.- 



-Opisthocosmia bogo- 



TENSIS. X 2. 



