96 PROCEEDINGS OF THE AMERICAN ACADEMY. 



angle of about 60° with the tibia and divaricating about 80°, their tips 

 incurved ; inner middle calcaria considerably longer than the outer, 

 fully half as long again as the others or as the spurs, but much 

 shorter than the first joint of the tarsi. Hind tarsi considerably less 

 than half as long as the tibiae, the first joint hardly so long as the rest 

 together, the second fully twice as long as the third and with it as long 

 as the fourth. Cerci rather stout, tapering rapidly, somewhat shorter 

 than the breadth of the femora. 



Length of body, 11 mm. ; antennae, IS-f- mm. ; pronotum, 3.25 mm. ; 

 fore femora, 3.65 mm. ; hind femora, 9 mm. ; hind tibiae, 9 mm. 



1 ^ , Sierra de la Miguelito Mexico, E. Palmer. 



52. Ceuthophilus pacificus. 



Ceuthophilus pacijicus Thorn.. Ann. Rep. U. S. Geol. Surv. Terr., v. 

 436 (1872) ; Glov., 111. N. A. Ent., Orth., pi. 14, fig. 8 (1872). 



Ceuthophilus unispinosus Brunn., Monogr. Stenop., 64 (1888). 



Luteous, heavily irrorate with more or less confluent fuscous dots, 

 giving it, as Thomas well expresses it, a mossy appearance ; the 

 amount of confluence and accordingly of infuscation varies somewhat 

 in diflferent individuals, and is usually deepest on the pronotum, which 

 also often shows on either side a larger or smaller rufo-luteous patch 

 free from dots ; the hind femora retain the usual scalariform markings, 

 which are narrower than common. Antennae moderately stout at 

 base, very slender beyond, three or four times as long as the body. 

 Legs rather short. Fore femora scarcely stouter than the middle 

 femora, about a fourth longer than the pronotum and much less than 

 half as long as the hind femora, the iimer carina with a long subapical 

 spine. Middle femora with a long subapical spine on the front carina 

 sometimes accompanied by 1-2 shorter ones, the hind carina with a 

 single subapical spine besides the genicular spine. Hind femora 

 almost as long as the body, considerably more than twice as long as 

 the fore femora, very stout, apically tapering rapidly especially in the 

 ^ , the distal fifth subequal, about two and a half times longer than 

 broad {^), tlie darker portions heavily scabrous with raised points, 

 besides a sparse sprinkling of the same on the apical half of the inner 

 surface, the outer carina minutely and bluntly bi- or tri-serrulate, 

 sometimes with a large preapical triangular dentiform spine serrulate 

 on its proximal edge ( (^ ) or unarmed (9), the inner carina similar 

 but in the distal half more coarsely uniserrulate, the serration stopping 

 abruptly before the apex with a distinct denticle, sometimes produced 

 to a stout triangular spine, serrulate on the proximal edge ((?) or with 



