1975] 
Brady — Oxyopes 
193 
39, 40 of Brady, 1964) ; (3) tibialis and acleistus are much alike 
in color pattern (compare Figs. 5, 6 with figs. 1-6 of Brady, 1964), 
female reproductive organs (compare Figs. 35, 36 with figs. 13-20 
of Brady, 1964), and male palpi (compare Figs. 94-97 with figs. 
35-38 of Brady, 1964) ; (4) bifidus and bifissus have similar color 
patterns (compare Figs. 1, 2 with Figs. 3, 4) internal female geni- 
talia (compare Figs. 25, 27 with Fig. 37) and male palpi (compare 
Figs. 78-81 with Figs. 84-89). 
It should be stressed that these are observations that lend credi- 
bility to Diagram 1 as it is conceived. The relationships of the spe- 
cies is actually much more complex. For example, it appears that 
tibialis may be near the ancestral stem of both acleistus and aglossus- 
occidenSj although it shows more similarities to the former species. 
The diagram is a simplification of relationships. This is certainly a 
case where additional specimens subjected to numerical analyses of 
multiple characters might yield important information about rela- 
tionships. 
Tridens Group. This species group may also be arbitrarily sub- 
divided into two subgroups: one containing apollo and artemis; the 
other cougar , lynx , tridens , pardus, panther , ocelot , cornutus, and 
felinus. In the first subgroup only apollo has been found in Mexico. 
In the second subgroup pardus and lynx are represented by unique 
specimens (Brady, 1964), and cougar is recorded only from the 
southeastern United States (Brady, 1969). 
Utilizing comparative morphology, genitalic structure, color pat- 
terns, and distribution patterns, a dendrogram representing the hy- 
pothetical relationships of the eight species in the second subgroup 
is shown in Diagram 2. The well developed tibial apophyses and 
palpal sclerites of O. apollo and O. artemis males, as well as strongly 
developed fourth legs in both sexes, place them near the eight species 
in Diagram 2. There is considerable resemblance in color among 
the species of the tridens group that I have seen in the field. This is 
not so apparent in preserved specimens. Members of this group are 
not often taken in sweep-nets, but seem to frequent rather dry areas 
with scanty, low-growing vegetation. Some are found at high ele- 
vations. When more information is available, this group may be as 
well defined ecologically as morphologically. 
Important considerations in grouping species in Diagram 2 were as 
follows: (1) cougar , lynx , tridens , pardus, and panther have well- 
developed tibial apophyses on the male palpi; (2) cougar and lynx 
have very similar palpi (compare figs. 9, 10 of Brady, 1969, with 
figs. 66, 67 of Brady, 1964) ; (3) tridens and pardus have similar 
