No. 461] NORTH AMERICAN INVERTEBRATES. 299 
maxillae with an obliquely transverse furrow or groove, outer side often 
concave ; abdomen often depresse Drassidz. 
Lower spinnerets contiguous ; roit canal without furrow, outer. 
side convex  . : .  Clubionide. 
14. With but two spinners which are very v rironitiiant, but not two-jointed, 
eyes in two rows, legs short and heavy ; maxilla inclined over lip 
Zodariide. 
With six spinnerets 15. 
15. Three eyes on each side in a group, the rp M. E. waiti the E s. E.; 
cephalothorax rounded and flat, the pars cephalica very small; legs 
long and without spines, maxillae surrounding the lip . . Pholcide. 
M. E. never touch P.S. E.; only two eyes in side group, pars 
cephalica occupying entire front of cephalothorax : ; 16. 
16. Eyes in two rows, more or less curved ; no scopula; P. s. E. never 
much larger than eyes of front row; when P. M. E. are as far apart as 
A. S. E. (which is rare) then the legs are not spined 1 
Eyes usually in three (or four) rows, when in two rows, ien the p. S. E. 
are much larger than the eyes of front row, or the tarsi are scopulate, or 
the P. M. E. are farther apart than the A. S. E. en and the 
legs spined . 24. 
17. Legs I and II long, with rows of two kindà o spines, one TUR and 
the other in between are very short and curved Mimetide. 
No such spine arrangement on legs : . . . 18. 
18. Males only:— mandibles concave trite in did and bowed outward 
in middle ; tibia of male palpus with a process on outer side at base 
Dictynide. 
Males and females : — former never with such mandibles, x tibia of 
palpus not often armed at base 19. 
19. Upper spinnerets long and we or ve with the mandibles 
geniculate at base, and the A. M. E. only dark ; no comb on hind tarsi ; 
legs with spines; making flat irregular we ebs . e 
Upper spinnerets not long and two-jointed, additis : not promiuendy 
geniculate at base, other eyes besides A. M. E. are dark; S. E. often 
contiguous . 
20. Males only : — A. M: E. ae diameter from d margin upper 
spinnerets not two-jointed Dictynidæ 
Males and females : — upper ipinaereis two 
are some distance from clypeal m argin 
21. A comb on hind tarsus; legs usually withou 
globose ; maxilla inclined over lip ; clypeus as high as T E 
Jointed, or ese the A. M. E. 
Agalenide. 
t spinel; ‘abdomen often 
eridiidz. 
No such comb; maxillz usually less inclined over T spines = 
present on legs 
22. Epigynum of feinale: a ale slit; ; malt m has a idu on end oa 
