interrogation, because Latreille in his last work 1 excludes this 

 from his [102] Tetrapneumones. But the affinity to Dys- 

 dera is such that I think they ought not to be separated. 

 And the next genus which I have established seems to me to 

 be the link that unites the preceding to the Dipneumones and 

 goes better after Segestria than before, in a natural arrange- 

 ment. 



Herpyllus, (Mihi). 



Eyes 8, PI. 11, figs. 2, 15 ; two rows, one or both curved up- 

 ward ; legs 4- 1. 2. 3. rather stout and short ; lingua large, 

 short, nearly triangular or slightly truncated ; maxillae straight, 

 wider near the apex, not sensibly serrated, tooth moderately 

 long ; cephalothorax ellipsoid, gradually narrowed before, abdo- 

 men nearly of the same form. Making no web or tube for 

 their dwellings, but wandering for prey, and running with 

 great velocity. Eight species. I have never found their 

 cocoon. The great affinity between this genus and Tegenaria 

 and some Clubionas requires that it should be placed here. 

 This may belong to the Diplotoxops of Mr. Rafinesque ; but 

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

 description is vague and incorrect in many respects, for in- 

 stance, in its having a character derived from the palpi which 

 he may not know is a mere sexual distinction, I could not and 

 ought not adopt his name. Several species are common in 

 the United States, particularly a small black one, found under 

 stones in highways ; and a blackish one with a white band on 

 the cephalothorax, a band on the abdomen, beginning at base 

 and reaching the middle, and a spot near the apex white. 

 This one attains a great size, and is found in houses, under 

 stones, planks, the bark of decaying trees, etc. I call it 

 II. ecclcsiasticus, and the former II. ater. 



1 Families Naturellea du Rfegne Animal. Paris, 1825. 1 Vol. 8vo. 



