130 Journal New York Entomological Society. [Voi. xi. 



separated by the following table based on characters of forceps denta- 

 tion. 



Ri^ht arm of forceps with about twenty small, blunt teeth, all of practically the same 

 size and in a single continuous row ; left arm with numerous small, blunt teeth, 

 and a single large tooth midway between the center and the base of the arm. 



Japyx hubbardi Cook (Chiricahua Mts., Arizona). 

 Right arm of forceps with one or two teeth decidedly larger than the others (i) 



I. Center of inner margin of right arm with a single tooth larger than any of the 



other teeth (2). 

 I. Largest tooth or teeth of right arm not in the center of the margin, but placed 

 either proximally or distally from the center (5). 

 2. Right arm with a smooth, even sinus proximally from the broad central tooth, as 

 broad as the base of the tooth itself, and abruptly interrupted by another tooth, 

 smaller but also broad based and blunt ; a row of six subequal denticules 

 distally from the central tooth, and a superior row of one or two small denticules 

 proximally from it ; left arm with its largest tooth placed distally from the 

 center, and proximally from it a superior and an inferior row, each containing 



about six blunt denticules ' Japyx bidens Cook (Alabama). 



2. Right arm without a conspicuous sinus proximally from the central tooth ; this in 

 no case as broad as the base of the tooth itself, and not abruptly interrupted by 

 another blunt tooth (3). 



3. Right arm with the proximal margin from the large central tooth having but 

 one or two rounded denticules, the distal margin with about a dozen blunt 

 denticules; left arm with a large tooth one-third the length of the arm from 

 the base, midway between this tooth and the apex another smaller tooth, 

 and between these teeth a double row of variously sized denticules, each 



row containing about eight Japyx saussurii Humbert 



(Orizaba and Cordova, Mexico). 

 3. Right arm with four or more denticules on the proximal margin from the 

 central tooth (4). 

 4. Left arm very slender with about twenty distinct denticules arranged in two sub- 

 equal rows proximally from the largest tooth, which is distad from the center ; 

 distally from this tooth the margin is concave and nearly smooth ; right arm 

 without a superior row, but with a straight, inferior row of four or five rather 

 large, subequal denticules proximally from the large central tooth, and distally 



from it a concave, finely denticulate margin Japyx multidens Cook 



(Alabama). 



4. Left arm moderately stout with only seven or eight small denticules proximally from 



the largest tooth which is distad from the center ; distally from this tooth the 



margin is conVe;^and minutely denticulate ; right arm with the proximal margm 



from the central tooth convex with four small denticules, the distal margin 



concave with numerous denticules Japyx subterraneus Packard 



(Kentucky; District of Columbia). 



5. Right arm with two large teeth, one just before the other just after the center 



of the margin ; proximally from the first tooth the margin is convex with 



five denticules, between the two teeth straight with six, and distally from 



