60 GUIDE TO ORTHOPTERA 



little the longest and unusually distant from the extreme 

 apex, so as to appear rather as an additional pair of spurs. 

 Subgenital plate of male greatly produced and apically 

 deeply fissured. 



d^. Descending lobes of mesonotum slightly longer than 

 those of pronotum. Last tarsal joint very much shorter 

 than the remaining joints together, the third joint of hind 

 legs normal though but little shorter than the second. 

 Subgenital plate of male ample, rather deeply and broadly 

 emarginate, the sides extending backwards as slender 

 threads. .... Phrixoc7iemis Scudder. 



d^. Descending lobes of mesonotum no longer than those 

 of pronotum. Last tarsal joint about as long as the rest 

 together ; thii'd tarsal joint of hind legs wanting (as also 

 of fore legs). Subgenital plate of male immensely pro- 

 duced and so deeply fissured as to form two tapering 

 ribbons. ... . . Daihinia Haldeman. 



c ^. Third palpal joint shorter than the fifth, the inferior cleft 

 of the latter extending its whole length. Middle femora 

 with a genicular spine on posterior side. Hind tibiae slightly 

 longer than the hind femora, with numerous spines of the 

 second grade uniform in length and pretty regularly sepa- 

 rated ; calcaria three in number on each side, the middle one 

 much longer than the others. (First hind tarsal joint a third 

 shorter than the rest combined.) Subgenital plate of male 

 ample, apically bituberculate. . Udeopsylla Scudder. 



a^. (Vertex bituberculate. Palpi short), the last joint apically 

 with no inferior cleft. Descending lobes of mesonotum consider- 

 ably longer than those of pronotum; sides of fore and middle 

 coxae neither carinate nor spined. (Fore and middle femora 

 unarmed.) Fore tibiae sulcate above ; hind tibiae (of the same 

 length as the hind femora) with only one grade * of spines above 

 on the lateral margins ; (calcaria two in number on each side, 

 subequal and not long. Third hind tarsal joint half as long as 



* There are in reality two grades, but the alternating longer and shorter spines 

 are of such slight inequality as easily to be overlooked. 



