91 



[Legs arranged 4. 17273". This, and others placed in this 

 genus, may belong to the genus Diplotoxops of Mr. Rafi- 

 nesque, but as he makes the first pair of legs longest, and his 

 generic description is incorrect in many respects — for instance, 

 in deriving a character from the palpi, which is as a rule noth- 

 ing but a sexual distinction — his name has not been adopted. 

 Supplement.'] 



[Oliio, <3, 9; Mayport, Fla., ?. The stripe on tlie abdomen pale or 

 wanting. Wm. Holden. j. H. e.] 



2. Herpyllus ater. 

 PI. 11, fig. 3. 



Description. Deep glossy black, immaculate, feet rather 

 short. 



Observations. This species, readily distinguished from S. 

 descriptus, which has long slender legs, is found running with 

 great rapidity on paths and frequented places. It is diurnal, 

 and when pursued it seeks shelter under stones or leaves. It 

 has the same habits with H. bicolor, to which it is related. 



Habitat. Pennsylvania, New England. [456.] 



[?, length 7.2 mm.; cephalothorax 3.2 mm.; legs 7.2, 6, 6, 8.4. 

 d", " 6.2 mm.; " 2.5 mm.; " 5,4.6,4,6. 



Palpus of cf. PI. 20, fig. 16, 16a. 



Salem, Mass. April 19, in a bag under stones. July 30, under stones. 

 Sept. 29, in a bag under stones. West Roxbury ; June 1, ? in a thin bag 

 with a flat, pink cocoon. White Mountains, Sanborn. Marietta, Ohio, ?. 

 Wm. Holden. J. h. e.] 



3. Herpyllus bicolor. 

 PL 11, fig. 4. 



Descrip)tion. Rufous ; abdomen bluish black, with about six 

 impressed dots. Male same colors. 



Observations. This common species is found usually on the 

 ground or under stones, leaves, etc., rmming with great ra- 



