1974] 
Coyle — Genus Aliatypus 
469 
SW/PSS, SW/PSL, and PSL/PSS. Small A. trophonius is easily 
separated from large species by IFL, ITL, and I ML (Table 2). 
Closely related A. erebus can be distinguished from A. trophonius 
by the ratios (Table 2) CL/IMS, CL/AMD, and CL/PTSR, by 
body size (CL and other measurements in Table 2), and by the 
proportionately longer A. trophonius seminal receptacle stalks with 
more bends and relatively smaller bulbs (Figs. 172- 173). A. tro- 
phonius seminal receptacles are also markedly different from those of 
several other species. 
Description. See Tables 1-3. 
Males: Carapace. Thoracic groove a deep circular to elongate- 
oval pit. Postocular setae form roughly triangular grouping. Ster- 
num. Fig. 61. Posterior sigilla medium sized and rather well sep- 
arated. Pedipalps. Figs. 87, 116. Articles relatively short. Tibia 
greatly swollen ventrally, especially near distal end. Embolus base 
well separated from ICS base. OCS broad to near its tip where it 
suddenly tapers to fine point. Inner (concave) edge of OCS smooth. 
Leg I. Fig. 95. Majority of ventral macrosetae on tibia and meta- 
tarsus are ensiform ; background setae fairly sparse, long and slender, 
more erect on metatarsus. Abdomen. Tergites I and III reduced to 
spots at bases of macrosetae. Coloration. Pars thoracica pale yellow. 
Pars cephalica darker; light brown to medium brown around mar- 
gins and along median longitudinal line, lighter elsewhere. Chelicerae 
and pedipalps dorsally like pars cephalica. 
Females: Carapace. Thoracic groove a deep pit; roughly circular 
or slightly transverse. Postocular setae form longitudinal triangular 
band. Sternum. Fig. 74. Posterior sigilla moderately large and 
somewhat elongate. Peripheral sternal setae slender. Longest setae 
scattered rather evenly over sternum. Genitalia. Figs. 1 72-1 73. 
Stalks of seminal receptacles very weakly sclerotized, only slightly 
more sclerotized than bulbs. Stalks moderately long and slender; 
about same diameter throughout length; with 3 to 5 bends. Bulbs 
proportionately small to medium sized. Coloration. Pars thoracica 
pale yellow to pale yellow-brown. Pars cephalica darker ; light brown 
to medium red-brown around margins and along median longitudinal 
line, lighter elsewhere. Chelicerae like darkest part of pars cephalica. 
Distribution. Known only from the low foothills of the Coast 
Range just west and south of San Francisco Bay (Map 4). 
Records. California. San Francisco Co.: San Francisco, 9 • 
Santa Cruz Co.: 4.5 mi. N of Soquel center on Soquel-San Jose Rd., 
300 ft., 13 Oct. 1971, 2 cf , 9 9 . 
