1974] 
Coyle — Genus Aliatypus 
471 
red-brown. Chelicerae match pars cephalica. Pedipalps dorsally like 
or slightly lighter than pars cephalica. 
Females: Carapace. Thoracic groove a deep pit; elongate or trans- 
verse; rounded or triangular. Postocular setae numerous; form an 
elongate, roughly triangular grouping. Sternum. Fig. 75. Posterior 
sigilla large and rather well separated. Stout setae usually distributed 
around entire periphery of sternum; always common along anterior 
lateral margins. Most of central setae extremely elongate. Genitalia. 
Figs. 174-187. Seminal receptacles very weakly sclerotized. Stalks 
rather short; with 1 to 3 strong bends; same diameter throughout 
length. Bulbs large to very large. Coloration. Pars thoracica grey- 
yellow to pale brown. Pars cephalica darker; pale brown to dark 
chestnut brown ; darkest along margins and median longitudinal line. 
Chelicerae light brown to dark chestnut brown. 
Variation. Males: The two male samples, which are separated by 
the Central Valley, differ considerably in body size and EGS num- 
ber but are very similar in most ratio characters. The male from 
Tuolumne Co. is markedly larger (CL = 6.6 mm), has a propor- 
tionately longer pedipalpal patella (CL/PPL = 1.57; PTL/PPL 
— 1.02) and metatarsus I (CL/IML = 1.76; IML/ITarL = 
1.96), and proportionately closer posterior sigilla (SW/PSS — 5.41) 
than does the Mt. Diablo sample (CL = 4.4 mm-4.9 mm; CL/ 
PPL = 1.94-2.03: PTL/PPL = 1. 13-1.16; CL/IML = 1.94- 
2.07; IML/ITarL = 1.66-1.71; SW/PSS = 3.30-4.35). The 
only marked difference in palpus form is in conductor tip shape 
(Figs. 114-115). 
Females: The four population samples from the southern half of 
the Sierra Nevada Mountains (Sonora, Mariposa, Shaver Lake, and 
Pinehurst-Miramonte) are similar in all characters. Each of the other 
three samples (Mt. Diablo, Wilbur Springs, and Nevada City) are 
divergent from this homogeneous south Sierra grouping in some 
characters. Of these divergent samples, the Mt. Diablo sample is 
less divergent than either the Wilbur Springs or Nevada City sam- 
ples. 
The Mt. Diablo sample is divergent from the south Sierra grouping 
in body size (Fig. 34), IFL/IVFL, and IFL/ITarL, and is some- 
what divergent from all samples in CL/CMT (Fig. 35) and IMS/ 
CMT. The Wilbur Springs sample is divergent from the south 
Sierra grouping in body size (Fig. 34), CL/SL (Fig. 38), CL/SW, 
ITL/IML, and IMS/PSS (Fig. 36), and is divergent from all 
samples in CL/SL (Fig. 38), CL/SW, and IMS/PSS (Fig. 36). 
T^? Nevada City sample is divergent from the south Sierra group- 
