SCUDDER. NORTH AMERICAN CEUTHOPHILI. 95 



tapering in the basal half, beyond equal, not very slender and straight, 

 the tip strongly upcurved, the armature of the inner valves formed of 

 long, bluntly pointed, arcuate teeth. 



Length of body, $ 19 mm., 9 16.25 mm.; antennae, $ (est.) 40 

 mm.; pronotum, $ 5.25 mm., 9 4.75 mm.; fore femora, $ 6.75 mm., 

 9 5.3 mm.; hind femora and tibiae, each, $ 13 mm., 9 10.25 mm.; 

 ovipositor 4.75 mm. 



19 <J, 4 9. California (Edwards, Behrens, Crotch, Osten Sacken, 

 Palmer, Bruner), and in particular San Francisco, Pescadero, Gilroy, 

 Sonoma and Marin Counties, Santa Barbara, June, and San Ber- 

 nardino, Feb.; Beaver Dam, south of St. George, Utah, in the most 

 desert region, April 20-28, E. Palmer ; Ehrenberg, Colorado River, 

 Arizona, E. Palmer. It has also been reported from Vancouver Isl. 

 by Walker and Fletcher. In the U. S. National Museum, from the 

 Kiley Collection, are 4 g from California, Martinez, Cal. (Turner), 

 Los Angeles Co., Cal., and no locality (A. E. Brush) ; also a single $ 

 with extraordinarily broad hind tibiae from Alarneda Co., Cal. 



51. CEUTHOPHILUS LATIPES, sp. nov. 



Nearly uniform dull luteo-testaceous, with the usual fuscous slender 

 scalariform markings on the hind femora and short longitudinal fuscous 

 dashes on the posterior portions of the abdominal segments, repeated 

 vaguely as cloudy markings on the meso- and metanotum; pronotum 

 slightly infuscated anteriorly and posteriorly. Antennae moderately 

 slender, the legs exceptionally short. Fore femora distinctly though 

 only slightly stouter than the middle femora, scarcely longer than the 

 pronotum and much less than half as long as the hind femora, the 

 inner carina unarmed. Middle femora with a single preapical spine 

 on the front carina, and on the hind carina a single small spine or none 

 besides a tolerably long genicular spine. Hind femora somewhat 

 shorter than the body, exceptionally broad, about two and a half times 

 longer than broad, almost two and a half times longer than the fore 

 femora, strongly arcuate beneath, strongly and sharply constricted be- 

 fore the geniculation, with a very few raised points on the middle of the 

 inner side above, the outer carina closely serrulate, the inner carina dis- 

 tantly and finely denticulate, the intervening sulcus moderately broad 

 and uniform. Hind tibiae with the extreme base briefly arcuate, beyond 

 straight, of the same length as the femora, slender, armed beneath 

 with a single delicate subapical spine (sometimes two) besides the 

 apical pair ; spurs opposite, the basal at the end of the proximal 

 third of the tibia, scarcely longer than the tibial breadth, set at an 



