462 
Psyche 
[September-December 
Chetsworth 
Crescenta Park 
Sierra Madre 
Eaton Can. 
Salt Cr 
Chatsworth . 
Crescenta Park • 
Sierra Madre • 
Eaton Can. — f— 1 7 
Salt Cr — 
25 
1.60 1.70 1.80 
cl/ivfl 
26 
1.70 1.80 1.90 
CL/IFL 
Figures 25-26: Geographic variation of Aliatypus gulosus females. 
Modified Dice-Leraas diagrams. 25: CL/IVFL variation. 26: CL/IFL 
variation. 
Males: Carapace. Thoracic groove a deep, roughly circular pit. 
Postocular setae form a roughly triangular grouping. Sternum. 
Fig. 59- Posterior sigilla small and well separated. Pedipalps. 
Figs. 85, 1 10. Tibia banana shaped. Sperm reservoir large and 
loosely looped. Embolus base very close to ICS base. Distal half of 
conductor tapers evenly to tip. Inner (concave) edge of OCS with 
minute jagged serrations. Leg. I. Very similar to A. plutonis leg I 
in proportions and setation. Most ventral macrosetae on tibia and 
metatarsus are ensiform. Abdomen. Tergites I, II, and III all well 
developed; II largest and I smallest; sometimes II and III are fused 
together or nearly so. Coloration. Carapace light yellow-brown to 
medium red-brown; margins of pars cephalica often slightly darker. 
Chelicerae like lightest parts of carapace or slightly darker. Pedi- 
palps dorsally like lightest parts of carapace or lighter. 
Females: Carapace. Thoracic groove a deep transverse pit; slightly 
to much wider than long. Postocular setae form a roughly double 
row. Sternum. Fig. 70. Posterior sigilla rather small and far apart. 
Usually, all or most peripheral sternal setae slender; stout setae most 
likely found near anterior-lateral margins of sternum. Longest setae 
scattered rather evenly over sternum. Genitalia. Figs. 151-154* 
Seminal receptacles very weakly sclerotized. Stalks short and straight. 
Bulbs relatively large. Coloration. Pars thoracica pale yellow to 
medium brown. Pars cephalica centrally about same color; darker 
(light brown to chestnut brown) around margin. Chelicerae like 
darker portion of pars cephalica. 
Variation. While the total male sample (one male from Eaton 
Canyon and five from Salt Creek) is remarkably homogeneous in all 
characters, the female samples exhibit patterns of geographic variation 
which indicate some limitation to gene flow between the Salt Creek 
and the Los Angeles area populations. Females: Three characters 
exhibit marked geographic variation. The Salt Creek and Eaton 
Canyon samples differ somewhat markedly in two ratios, CL/IFL 
and CL/IVFL (Figs. 25-26). Also, Salt Creek specimens possess 
