1974 ] 
Coyle — Genus Aliatypus 
475 
extremely elongate. Genitalia. Figs. 188-191. Seminal receptacles 
very weakly sclerotized. Stalks rather short, with a few strong loops 
(3-5 bends), moderately thick, and same diameter throughout length. 
Bulbs rather large. Coloration. Pars thoracica grey-yellow. Pars 
cephalica darker; light brown to medium brown; darkest along mar- 
gins and median longitudinal line. Chelicerae match darkest parts 
of pars cephalica. 
Variation. Males: Both Riverside males have a more slender pedi- 
palpal tibia (Fig. 90) than all other specimens, which are all similar 
to Figure 89. The palpus form of most specimens is like Figure 118 
or intermediate between this and the Palomar Mountain specimen 
(Fig. 1 17). Females: As illustrated (Figs. 188-191), there is a small 
amount of largely intrapopulation variation in bulb size and stalk 
diameter. 
Distribution. Southwestern California south of the San Bernardino 
Mountains (Map 4). 
Records. California. Riverside Co.: U. of Calif, at Riverside 
campus, 1250 ft., 27 Oct. 1967, cf ; 31 Oct. 1968, cf ; 4? • — S of 
Banning on Hwy. 243, 5.4 mi. S of junc. with I-iO, 3300 ft., 21 
Aug. 1968, (2cf ), $ ; 3 ? • San Diego Co.: Hwy. 395, 4 mi. E of 
Fallbrook, 800 ft.; 20 Sept. 1971, cf. — Palomar Mtn., Nate 
Harrison Grade Rd., 2350 ft., 6 Jan. 1972, cf. 
Aliatypus torridus new species 
Figures 64, 77, 91, 1 19-120, 192-194. Map. 4. 
Type specimens and etymology. Holotype male from Mountain 
Center, Riverside Co., California, 3 October 1968 (W. R. Ice- 
nogle). One male and four female paratypes. The specific name is a 
Latin adjective meaning dry and hot. 
Diagnosis. Males: The pedipalpal tibia (Fig. 91) of this species 
has a distinctive shape and the pedipalpal patella is relatively short 
so that PTX/PTL and PTL/PPL (Table 1) together distinguish 
A. torridus from all other species. For other characters which also 
distinguish A. torridus from closely related A. trophonius , A. erebus, 
and A. plutonis, see these species’ diagnoses. Females: A. torridus 
is difficult to distinguish from A. erebus; CMT number, CL/OQW, 
CL/CMT, and IMS/CMT (Table 2) are the most helpful diag- 
nostic characters. A. torridus is distinguished from closely related 
and sympatric A. plutonis by IVFL/IVML, PSL/PSS (Table 2), 
and its shorter, thicker seminal receptacle stalks (Figs. 192- 194). 
Among the following characters can be found at least one that will 
