SCUDDER. NORTH AMERICAN CEUTHOPHILI. 



nearly straight, the whole fully four times as long as broad, the dark 

 portions of the surface, even of the inner side, with slight, equally 

 distributed raised points but none independent of them, the outer 

 carina ( 9 ) with delicate distant spinules especially beyond the middle, 

 the inner carina similarly armed, the intervening sulcus moderately 

 narrow. Hind tibiae considerably longer than the femora, slender, 

 armed beneath with a single preapical spine besides the apical pair ; 

 spurs rudely opposite, the basal well beyond the end of the proximal 

 third of the tibia, half as long again as the tibial depth, set at an 

 angle of 35 with the tibia and divaricating 90-100, their tips strongly 

 incurved ; inner middle calcaria considerably longer than the outer, 

 much more than twice as long as the others or as the spurs, but much 

 shorter than the first tarsal joint. Hind tarsi almost half as long as 

 the tibiae, the first joint as long as the rest together, the second almost 

 three times as long as the third and with it longer than the fourth. 

 Cerci tapering throughout, finely pointed, half as long again as the 

 femoral breadth. Ovipositor hardly three quarters as long as the fore 

 femora, stout in basal third, tapering in middle third, slender and sub- 

 equal in distal third, the apex produced and slightly upturned, the 

 inner valves with eight sharp but slight serrations. 



Length of body, 9 19.5 mm. ; pronotum, 5.2 mm.; fore femora, 10 

 mm.; hind femora, 18.75 mm.; hind tibiae, 20.25 mm. ; ovipositor, 

 7 mm. 



2 9 . Nickajack Cave, Tenn. 



3. CEUTHOPHILUS STYGIUS. 



Rhaphidophora stygia Scudd. !, Proc. Bost. Soc. Nat. Hist., viii. 9 

 (1861); Pack., Amer. Nat., v. 745 (1871). 



Ceuthophilus stygius Scudd.!, Bost. Journ. Nat. Hist., vii. 438 

 (1862) ; Walk., Cat. Derm. Salt. Brit. Mus., i. 202 (1869); Pack., 

 Guide Ins., 565 (1869) ; Riley, Stand. Nat. Hist., ii. 184 (1884) ; 

 Pack., Mem Nat. Acad. Sc., iv. 70-71, 83 (1888); Brunn., Monogr. 

 Stenop., 65 (1888); Blatchl., Proc. Ind. Acad. Sc., 1892, 148-149 

 (1894). 



Ceuthophilus sloanii Pack. !, Ann. Rep. Peab. Acad. Sc., v. 93-94 

 (1873) ; Id. !, Mem. Nat. Acad. Sc., iv. 71, 83 (1888). Immature. 



Body pale brown, the segments bordered posteriorly with dark 

 brown or black, becoming gradually paler toward the hinder part of 

 the body and dotted with pale spots ; the markings in general closely 

 resemble those of C. gracilipes, but the dark colors do not generally pre- 

 vail to so great an extent as in that species. The antennae, moderately 

 VOL. xxx. (N. s xxii.) 3 



