102 On North American Spiders. 



Tetrapneumones. Bui the affinity to Dysdera 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 arrangement. 



Herpyllus, (Mihi.) 



Eyes Q, o ^ "^ o or oooo; two rows, one or both curved up- 

 ward; legs 4. 1.2. 3. rather stout and short 5 lingua large, short, near- 

 ly triangular or slightly truncated ; maxillae straight, wider near the 

 apex, not sensibly serrated, tooth moderately long ; cephalothorax el- 

 lipsoid, gradually narrowed before, abdomen 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 CLUBioNiE requires that it should be placed here. This 

 may belong to the Diploioxo'ps of Mr. Rafinesque 5 but as he makes 

 the first pair of legs longest, and as his generic description is vague 

 and incorrect in many respects, for instance, in its having a character 

 derived from the palpi which he may not know is a mere sexual distinc- 

 tion, 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 high ways; 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, &ic. I call it H. ecdesiasticus, and the former 

 H. ater. 



Clubiona, (Latr.) 



Eyes 8, in two rows curved variously ; legs 1. 4. 2. 3. or 4. 2. 1. 3. 

 or 4. 1 . 2. 3. lingua truncated. Aranei'des forming silk tubes in leaves 

 which they twist, or under the bark of trees. Six species. Most 

 species fly about in the air, by means of a long thread, at the end of 

 which they suspend themselves, and which is borne by the wind, 

 sometimes raising them to a great height. 



Tegenaria, (Walck.) Aranea, (Latr.) 



Eyes 8, ^o ° ° o'^ 5 legs 4. I. 2. 3. Making in houses, cellars 

 and other dark places the common webs, which are spread horizon- 



