of the North American Orthoptera. 439 



11. C. AGASSIZII. 



Raphidophora Agassizii, Scudd., Proc. Bost. Soc. Nat. 



Hist; VIII. 11. (1861). 

 Gulf of Georgia, Washington Territory, (A. Agassiz.) 



12. C. GRACILIPES. 



Phalangopsis gracilipes, Hald., Proc. Am. Ass. Adv. 



Sc. ; II. 346. (1850.) 



Raphidophora gracilipes, Scudd., Proc. Bost. Soc. Nat. 



Hist. ; VIII. 7. (1861.) 



This has longer legs than any other species, unless it be 

 C. stygia, which it much resembles in style of marking 

 and length of antennae ; this, together with the two pre- 

 ceding species, frequently have little suppressed spines 

 upon the inner edge of the upper posterior half of the 

 hind femora. 



S. Illinois, (Uhler.) N. York, (Uhler.) Schooley's Mt., 

 New Jersey, (Mus. Comp. Zool.) 3 g. 



The first eight species of Ceuthophilus mentioned agree 

 together remarkably in the distribution of the markings 

 of the dorsum, as do also the three last among them- 

 selves, while C. californianus and the undescribed Texan 

 species form a third distinct group. 



HADENCECUS, Nov. gen. (adrje, 



Body small and slender ; head similar to Ceuthophilus ; 

 antennae, very long and slender, exceeding the length of 

 the body many times ; basal joints much as in Ceuthophi- 

 lus^ except that the second is broader, and the fourth is 

 more than half the length of the third ; eyes as in Ceu- 

 thophilus; maxillary palpi very long and slender ; first joint 

 short ; second fully twice as long as first ; third quite long, 

 fully equalling twice the length of second ; fourth nearly 

 as long as the third, slender at the base, thickened towards 

 the tip ; fifth, longer than third, of a similar form to the 

 fourth, but more incrassated at the tip, compressed lat- 



