1974] 
Coyle — Genus Aliatypus 
453 
base. Conductor tapers evenly to narrow tip which is sharp or an- 
gularly truncate; tip may be bent or straight. Inner (concave) edge 
of OCS smooth to somewhat rough. Leg. I. A few to all ventral 
macrosetae on tibia and metatarsus are ensiform ; background setae 
long, slender, not appressed, and very densely distributed. Abdomen. 
Tergites I and III reduced to small patches or spots at bases of 
macrosetae. Coloration. Pars thoracica pale yellow to light brown. 
Pars cephalica markedly darker; medium to dark red-brown or 
chestnut. Chelicerae usually slightly darker red-brown than pars 
cephalica. Dorsal surface of pedipalpal patella and tibia same as 
chelicerae or darker. 
Females: Carapace. Thoracic groove a deep pit; usually roughly 
triangular or T-shaped; rarely a transverse furrow, transversely 
oval, or circular. Postocular setae form a very narrow longitudinal 
row. Sternum. Fig. 66. Posterior sigilla medium sized and well 
separated. Great majority of peripheral sternal setae slender; usually 
a few to many stout ones on anterior-lateral margins. Longest setae 
scattered over most of sternum, but slightly more abundant anteriorly. 
Genitalia. Figs. 1 32-1 43. Stalks of seminal receptacles very weakly 
to moderately heavily sclerotized ; almost always much thicker at 
base than at distal end; weakly to strongly sinuous (3-9 bends). 
Bulbs small to medium sized ; less sclerotized than stalks. Coloration. 
Pars thoracica pale yellow to rather dark yellow-gray. Pars cephalica 
slightly to much darker; pale brown to chestnut; median longitudinal 
band and posterior border darker than rest. Chelicerae orange- 
brown, red-brown, or chestnut; slightly darker than dark part of 
pars cephalica. 
Variation. Males: Although the male population samples are very 
small, they should provide at least an indication of the geographic 
variation patterns within this species. The strongest geographic 
variation occurs in pedipalpal tibia shape and conductor tip form. 
As Figures 18, 21, 83, and 84 indicate, the Yosemite and Briceburg 
specimens have markedly more elongate and slender pedipalpal tibiae 
than do the other samples. However, because of a relatively short 
pedipalpal patella, the Hume Lake and Sequoia specimens exhibit a 
PTL/PPL ratio similar to the Yosemite and Briceburg specimens 
and distinct from the other samples (Fig. 19). Although conductor 
tip shape varies considerably, the variation is rather continuous and 
clinal (Figs. 102-105). The Yosemite conductor tips (Fig. 103) are 
rounded in ventral view and strongly bent dorsad. The Briceburg 
conductor tip is very similar except that it is not as strongly bent 
dorsad. The Benton Station conductor tip is like the Yosemite tips. 
