406 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 55. 



from Centrodora principally in antennal characters, the female hav- 

 ing the fourth joint longer than the fifth in both sexes and the male 

 scape being much more greatly enlarged. These are probably only 

 specific characters, and it is likeW tliat the study of additional spe- 

 cies will make it necessary to sink TumicliscapiLS as a synonym of 

 C entrodora. 



TUMIDISCAPUS ORTHOPTERAE, new species. 



Except for the fact that the male scape appears to be much more 

 greatly enlarged and flattened and the third antennal joint very 

 slightly shorter, the male of this species seems to be exactly like the 

 unique type of T. jiavus Girault. Additional specimens may pos- 

 sibly prove them to be the same species. 



Female. — Length 1.15 mm. Vertex granularly opaque, remainder 

 of head and thorax very faintly microscopically sculptured, if at 

 all; abdomen apparently smooth. Antennae 6-jointed. as follows: 

 Scape, pedicel, 3-jointed funicle, and a solid club (figs. 4 and 5) ; 

 the first funicle joint might be called a ring- joint, being smaller than 



the other joints, but 

 somewhat longer than 

 broad; its apex ob- 

 liquely truncate, the 

 upper margin shorter 

 than the lower mar- 

 gin; the second fun- 

 icle joint attached so 

 as to form a distinct 

 angle with the first; 



Fig. 4.— Antenna OF FEMALE TUMIDISCAPUS ORTHOPTERAE GAHAN. 



mandibles tndentate ; 

 parapsidal grooves deeply impressed, complete; praescutum with 

 a weak median longitudinal groove; scutellum nearly circu- 

 lar with a weak median longitudinal groove; propodeum ap- 

 parently with a strong median longitudinal carina probably 

 due to the caving-in of the integument on each side of the 

 middle in drying; forewing long and rather slender, extending con- 

 siderably beyond the apex of the abdomen, its greatest length ap- 

 proximately three and one-half times its greatest breadth ; marginal 

 and submarginal veins equal, postmarginal absent, marginal cilia of 

 forewing approximately one-fifth the greatest wing breadth, discal 

 cilia moderately dense, nearly uniformly distributed except that the 

 base of wing to the apex of submarginal is nearly bare, and there is 

 a poorly defined nearly hairless oblique line extending from the stig- 

 mal vein backward and basad to the posterior wing-margin; hind 

 wing long and narrow, the discal ciliation rather weak except a 

 double row along the anterior margin, the longest marginal cilia a 

 little longer than the wing breadth ; legs slender ; abdomen distinctly 

 longer than the head and thorax, sessile, acuminate at apex, the 



