192 
Psyche 
[June 
SPECIES GROUPS OF OXYOPES 
The 1 6 species of Oxyopes reported from Mexico and Central 
America in this paper can be combined into five distinct groups. 
These species groups are based primarily upon the shape or form 
of the body (morphology), color pattern, relative lengths of legs, 
and structure of the male and female reproductive organs. For the 
sake of completeness, five species of Oxyopes recorded only from 
north of Mexico are included in the discussion below. 
A cleistus Group. This species group may be arbitrarily subdivided 
into two subgroups: one containing chiapas , summus, occidens, and 
aglossus; the other containing tibialis , acleistus , bifidus , and bifissus. 
In the first sub-group only aglossus is not recorded from Mexico or 
Central America. All of the second group are found in Mexico. 
In light of comparative morphology, genitalic structure, color pat- 
terns, and geographical distribution, a dendrogram representing the 
relationships of the eight species in this species group is shown in 
Diagram i. 
Important considerations in grouping species in Diagram i were 
as follows: (i) chiapas and summus have similar internal female 
genitalia (compare Fig. 33 to Fig. 31) and the male palpi are alike 
(compare Figs. 92, 93 to Figs. 90, 91); (2) occidens and aglossus 
are similar in coloration (compare figs. 7, 8 to figs. 9-12 of Brady, 
1964), female reproductive organs (compare figs. 23, 24 to figs. 21, 
22 of Brady, 1964), and male palpi (compare figs. 33, 34 to figs. 
chiapas summus occidens aglossus tibialis acleistus bifidus bifissus 
Diagram 1. 
