SCUDDER. NORTH AMERICAN CEUTHOPHILI. 93 



infuscated, the hind femora with feeblest possible fuscous scalariform 

 markings. AntenuiE very slender, two or three times as long as the 

 body, the legs short. Fore femora slightly broader than the middle 

 femora, a very little longer than the pronotum (relatively longer in the 

 9 than in the c?), a little more than half as long as the hind femora, 

 the inner carina with a rather long subapical spine and sometimes an 

 additional one. Middle femora with 2-4, usually three, subequal 

 spines on the front carina, and on the hind carina generally four spines 

 besides a moderately long genicular spine. Hind femora moderately 

 slender, tapering with almost exact regularity to the tip, somewhat 

 more than three times as long as broad, rather less than twice as long 

 as the fore femora, the surface just beyond the middle with very 

 scattered raised points on the whole upper half of the femora outside 

 and inside, both carinte distantly and delicately serrulate in both sexes, 

 the intervening sulcus narrow. Hind tibiae straight in both sexes, a 

 very little longer than the femora, at least in the male, slightly 

 enlarged apically as viewed from the side, armed beneath with a single 

 subapical spine besides the apical pair ; spurs subalteruate, the basal 

 set far before the end of the proximal fourth of the tibia, fully twice 

 as long as the tibial depth, set at an angle of 30-40° with the tibia and 

 divaricating at not above 90°, their extreme tips scarcely incurved ; 

 inner middle calcaria of about the same length as the outer, nearly 

 twice as long as the others and half as long again as the spurs, but 

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

 as the tibite, the first joint as long as the rest together, the second more 

 than twice as long as the third and with it equal to the fourth. Cerci 

 moderately slender, at least as long as the pronotum. Ovipositor 

 slender, straight, tapering at the base, equal from before the middle, 

 longer than the fore femora, the tip produced to an aculeate spine 

 projecting a little upward, the teeth of the inner valves pretty long, 

 aculeate, arcuate. 



Length of body, c? 10 mm., 9 9 mm.; pronotum, $ 4 ram., 9 3.6 

 mm. ; fore femora, ^ 4.25 mm., 9 4.2 mm. ; hind femora, ^ 8 mm., 

 9 7.7 mm. ; hind tibiee, ^ 8.5 mm., 9 7.8 mm. ; ovipositor, 4.5 mm. 



2 (?, 2 9. West Point, Nebr. ; Sheridan, Wyo., C. Y. Smith, all 

 from L. Bruner ; St. Louis, Engelmann. 



50. Ckuthophilus californianus. 



Ceuthophihts califorjiianus Scudd.!, Bost. Journ. Nat. Hist., vii. 438 

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



Ceuthophihts castaneus Thom.!, Rep. U. S. Geol. Geogr. Surv. Terr., 



