172 
Psyche 
[June 
Males from D and F usually have thinner, straighter cheliceral 
apophyses which bend nearer the distal end (Fig. 48) than the 
apophyses of males from the type locality C (Fig. 47). Some Sierran 
males (Fig. 49) are closer in this character to C males than are the 
D and F males. 
The outer conductor sclerite of the palpus of Sierran males is 
usually relatively shorter and wider than that of coastal males. Also, 
the base of the embolus (expanded portion with the looping sperm 
reservoir) is relatively smaller in Sierran specimens. Figures 53 and 
56 are palpi representing the two extremes of geographic variation 
in these characters. 
Most males, including all from C, G and H, have only a. single 
enciform macroseta ventrally at the distal end of metatarsus I as in 
Fig. 68. The rest have either one or two additional macrosetae as in 
Fig. 70, and three of these specimens — all in sample / — possess 
a single enciform macroseta on the prolateral surface one-third of 
the way from the proximal end. Sierran males usually have fewer 
tibia I macrosetae than do the coastal males. 
The AL spinnerets of all coastal males possess a spigot originating 
from a weakly sclerotized terminus (Fig. 33). None of the Sierran 
males have a spigot or such a. terminus on their AL spinnerets (Fig. 
34). The ratio of AL length to PM length is usually 1:2 1/2 to 
1:2 for coastal males and 1:3 to 1:2 1/2 for Sierran males. 
Females. As was true for the males, distances were greater in 
comparisons of samples of coastal females with Sierran samples than 
in intra-coastal or intra-Sierran comparisons. Also, CL averages 
somewhat less in Sierran population samples than in the coastal 
samples (Fig. 25). Many other measurements and meristic char- 
acters showed a similar pattern of geographic variation; a very few 
of these, such as CMT (Fig. 26), have small gaps between some 
samples. The ratio with the most marked geographic variation (with 
the largest distances in the paired comparisons) is CMT/ICTR 
(Fig. 27). The relative width of the sternum is greater for most 
Explanation of Plate 10 
Figs. 30-34. Spinnerets of females (ventral view). 30. A. gertschi, para- 
type from O. 31. A. river si, from C . 32. A. hadros, paratype from type 
locality. 33-34. AL spinneret of A. river si. 33. from C. 34. from G. [2.0 mm 
scale line for 30-32; 0.3 mm scale line for 33-34] 
Figs. 35-40. Sternum, labium, and palpal coxa (ventral view). 35-36. 
A. gertschi 35. $ holotype. 36. $ paratype, from O. 37-38. A. hadros. 
37. $ paratype, from type locality. 38. $ paratype, from type locality. 
39-40. A. riversi. 39. $ lectotype. 40. $ from C. [2.0 mm scale line for 
35-40] 
