658 PROCEEDINGS OF THE NATIONAL MUSEUM. vol.49. 



in the matanotum. Legs very long and slender, the anterior femora 

 about three times as long as the pronotum; all tibiae square in 

 transverse section and similarly armed above and below on both 

 outer and inner margins with short heavy close-set spines (fig. 2), 

 the apical calcars short; fore femora without genicular spines, the 

 others with short ones on the posterior side, all of them armed above 

 on the posterior three-fourths on both the outer and inner margin 

 with spines similar in arrangement and structure to those of the 

 tibiae and beneath the hind and middle femora are armed on both 

 margins with short, sharp spines separated by spaces usually as 

 great as, or greater than, their own length, the fore femora similarly 

 armed beneath on the inner margin only, the outer 

 margin unarmed; tarsi slender, naked beneath, sparsely 

 and microscopically pilose above, the second segment of 

 all the tarsi three times as long as deep, the first and 

 second segments of the hind feet prolonged posteriorly 

 above in the form of an elongate heavy spine. Abdomen 

 moderately heavy, as broad as the metathorax; subgeni- 

 tal plate of the male ample, the hind margin entire, 

 rounded, furnished with two small styles consisting of a 

 Fig. 2.— TEiprois- single bluntly conical Segment; subgenital plate of the 

 cHiA xANTHo- fgjjjaje broad and apically very broadly and shallowly 



STOMA. Cross ... . . 



SECTION oFHiND uotchcd; ccrcl simple in both sexes, cylindrical and grad- 



"°^'^' ually tapering in the female, in the male less tapered 



apically and longitudinally deeply concave in the apical two-thirds; 



ovipositor three times as long as the pronotom and moderately heavy, 



gently curved upward, the tip sharp and unarmed. 



The type and only species of this genus is the Tropidischia xanthos- 

 toma of Scudder, described as Rhaphidop>hora xanthostoma in 1861.* 

 Besides the type material of this species from California in the Scud- 

 der collection in Cambridge, Massachusetts, the followmg specimens 

 have been examined: 



One female and one nymph from Los Angeles County, California, 

 in the collection of the Academy of Natural Sciences in Philadelphia. 



One female from near Hoquiam, in the southwestern part of the 

 State of Washington, in the collection of the United States National 

 Museum. 



One male and one female from British Columbia, taken by Harvey 

 Hadden in 1911, in the British Museum in London. 



One male from Vancouver Island, British Columbia, taken by 

 E. M. Anderson, March 10, 1913, in collection of the United States 

 National Museum. 



The only localities hitherto pubHshed for this apparently rare 

 insect are California and Oregon. 



I Proc. Bost. Soc. Nat. Hist., vol. 8, p. 12. 



