. 
102 On North American Spiders. 
‘TetRaPNEUMONES. But the affinity to Dyspera 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 
Drexeumones and goes better after ScesTRia than before, in a 
natural arrangement. : 
Herevivs, (Mihi.) 
Bee 6 0: 6 ; 
Byes 6,0 8% s JF 0 Oe 5 tworows, one or both curved up- 
ward; legs 4. 1.2. 3. rather stout and short ; lingua large, short, neat- 
ly triangular or slightly truncated; maxille straight, wider near the 
apex, not sensibly serrated, tooth moderately long ; cephalothorax e- 
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’ foun 
~ their cocoon. The great affinity between this genus and 'TEGENARI 
and some Custon® 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 instance, in its having @ characte! 
derived from the palpi which he may not know is a mere sexual distine- 
tion, I could not and ought not adopt his name. Several species ae 
common in the United States, particularly a small black one, found 
under stones in high ways; and a blackish one with a white band 02 
the eephalothorax, a band on the abdomen, beginning at base an 
reaching the middle, and a spot near the apex white. "This one attaits 
a great size, and is found in houses, under stones, planks, the bark 
of decaying trees, Nc. I call it H. ecclesiasticus, and the forme! 
Hi. ater. . 
. Cuvsiona, (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. Araneides forming silk tubes in leav® 
which they twist, or under the bark of trees. Six species: “y 
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. 
Troenarta, (Walck.) 4ranea, (Latr.) 
Eyes 8, % ; ; os legs 4.1.2. & Making in houses; cellars 
and other dark places the common webs, which are spread horizon 
