104 



straight and nearly parallel, while the inner margins are sloping, and 

 converge to the median line of the rostrum ; along the inner edge of 

 the tips is arranged a row of long, stiff hairs ; sides of the rostrum 

 slightly concave, and at the base of the upper surface is a broad, shal- 

 low depression, which narrows to the apex of the bifurcation. A prom- 

 inent si^ine projects over the inner canthus of the eye ; the outer angle 

 of the orbit not produced j a deep sulcus on the superior border of the 

 orbit, which is bridged over at the top by a small spine, which arises 

 from the base of the prominent spine at the inner canthus ; on the in- 

 ferior border of the orbit is another fissure, from the bottom of which 

 is a strong spine, springing from the base of the outer angle, and 

 projecting inward and downward under the basal article of the external 

 antenna. 



External antennae hidden under the rostrum j the basal article robust, 

 longer than broad, forming a part of the inferior border of the orbit; 

 the external angle produced in the form of a tooth ; the remaining arti- 

 cles slender and cylindrical j a row of long stiff hairs along the entire 

 inner side of the antennae. 



Legs slender, smooth, and shining like the carapace; the joints cylin- 

 drical, with the exception of the fourth, which is depressed, and marked 

 by a longitudinal depression above and below; the tarsi are tapering, 

 and armed with long corneous points; the anterior pair of feec only 

 very slightly more robust than the following; the hands much com- 

 pressed ; fingers slender, white at the tips, with their cutting edges 

 approximating along nearly their entire length. 



Abdomen composed of seven segments; on the center of the first 

 segment there is a rather prominent tubercle; the terminal segment is 

 somewhat triangular, with a rounded apex. 



The breadth of the carapace is exactly three-fourths of the length. 

 Length, including the rostrum, 2.70 inches ; breadth, 2.03 ; the anterior 

 Ijair of legs a little longer than the body; the length of the second pair 

 equals that of the first ; the length of the hand and carpus of the first 

 pair comprise one-half of their entire length. 



Locality : Lower California. 



The arrangement of the spines on the surface of the carapace, and 

 the absence of the lateral row of spines are sufficient to distinguish this 

 species from all others belonging to the genus. 



