1974 ] 
Coyle — Genus Aliatypus 
447 
scription is more thorough, includes illustrations, and describes a 
crucial diagnostic feature, the ICS keel. This shows up in Fig. 4a 
of Smith’s Plate XV. Although Smith correctly states that the 
pedipalpal tibia is longer than the patella, he erred in drawing it 
shorter (Smith’s Fig. 3, Plate XV). The specimens upon which 
Smith based his description were placed in the Stanford University 
collection but have since been lost. Having closely examined the type 
specimen and Smith’s description, I am confident that the material 
upon which the following description is based is conspecific with that 
described by Banks and Smith. 
Diagnosis. Males: The presence of a keel on the ICS together 
with the shape of the conductor tip (Figs. 96-100) distinguish this 
species from all others. Closely related A. janus differs from A. 
calif ornicus in the ratio IML/ITarL (Table 1). A. isolatus, also 
closely related, is distinguished by the ratios IML/ITarL, PPL/ 
PFL, and PTL/PPL (Table 1). Any of the other species can be 
separated from A. calif ornicus with the appropriate ratio selected 
from the following: CL/IML, CL/PSL, and PTL/PPL (Table 
1). Females: A. calif ornicus females are difficult to distinguish from 
those of A. janus and A. isolatus. A. calif ornicus seminal receptacle 
stalks are of about equal diameter throughout (Figs. 121-131), un- 
like those of A. janus (Figs. 132- 143) and A. isolatus (Figs. 144- 
146) which are much narrower distally than at the basal end. In 
A. isolatus the postocular row of cephalic setae extends to a point 
one-half or more of the distance from the anterior edge of the cara- 
pace to the thoracic groove; in A. calif ornicus it extends to a point 
less than one-half the distance to the thoracic groove. A. aquilonius 
and A. gnomus, both closely related to A. calif ornicus, can be dis- 
tinguished from the latter by their small body size (Table 2; espe- 
cially ITarL). A. aquilonius has distinctively smaller CL/PTSR 
and IFL/IVFL values (Table 2) and seminal receptacles with more 
swollen stalk bases (Figs. 147-148) than A. calif ornicus (Figs. 12 1- 
1 3 1 ) . A. gnomus has a distinctively larger AMD/AMS value 
(Table 2) and shorter, less sinuous seminal receptacles (Figs. 149- 
150) than A. calif ornicus (Figs. 121-131). All other species can be 
separated from A. calif ornicus by either seminal receptacle form or 
appropriate ratios chosen from the following (Table 2): CL/IFL, 
CL/ITL, CL/IML, SW/PSL, and PSL/PSS. 
Description. See Tables 1-3. 
Male: Carapace. Figs. 45-46. Thoracic groove a deep pit; usually 
rounded anteriorly, elongate, and tapering posteriorly ; sometimes 
nearly circular or triangular. Postocular setae form a narrow longi- 
