SCUDDER. NORTH AMERICAN CEUTHOPHILI. 19 



In addition to the characters mentioned above and those given in 

 previous descriptions, I may add that all the legs are tetraquetrous, 

 with all the margins spined, the spines similar in character and uni- 

 formly crowded, excepting on the lower margins of the fore femora, 

 the inner carina of which is sparsely spiued, the outer carina unarmed; 

 also the lower margins of the middle femora, both carinae of which are 

 sparsely spined on the apical half ; and the hind femora, the four 

 carinae of which, even on the swollen portion, are armed excepting at 

 the extreme base, though both the inferior carinae are rather sparsely 

 spined. There are no spines on the genicular lobes of the femora, 

 excepting a very slight one on the posterior side of the middle femora. 

 There are but two pair of calcaria on the hind tibias, the upper the 

 longer and less than half as long as the first tarsal joint. The hind 

 tarsi are very strongly compressed, carinate beneath without pulvilli, 

 about two fifths as long as the hind tibiae, the first joint nearly as long 

 as the remaining joints together, the second and fourth joints of the 

 same length and either of them three times as long as the third. 

 Finally, the subgenital lamina of the male is ample, the hind margin 

 entire, with minute styles, consisting of a single bluntly conical joint ; 

 and the ovipositor is slender, gently arcuate, tapering and acuminate, 

 unarmed at tip. 



TROPIDISCHIA XANTHOSTOMA. 



Rhaphidophora xanthostoma Scudd.!, Proc. Bost. Soc. Nat. Hist., 

 viii. 12 (1861). 



Tropidischia xanthostoma Scudd.!, Bost. Journ. Nat. Hist., vii. 441 

 (1862). 



Originally described from Crescent City, Cal. (A. Agassiz). I have 

 since received both sexes from Mendocino, Cal., through the favor of 

 Mr. J. Behrens. 



