164 
Psyche 
[June 
species and appropriately described a. new genus (Aliatypus) for its 
placement. 
1. 
2 . 
I. 
Key to the Species of Atypoides 
Males 
Width of sternum equal to or slightly less than its length (not 
including labium) (Fig. 37). Tibia I with prominent macro- 
setae clustered near proximal end on prolateral surface and 
retrolateral aspect of ventral surface; often 1 or 2 macrosetae 
near middle on ventral surface; no macrosetae at distal end of 
ventral surface (Figs. 71-73). Eastern U. S. (Illinois and 
Missouri) hadros 
Sternum (not including labium) clearly longer than wide (Figs. 
35, 39)- Tibia. I with macrosetae present in ill-defined ventral 
and prolateral rows which extend most of its length; usually 
1 to 3 macrosetae present ventrally at distal end (Figs. 68, 69, 
74, 76, 77). Western U. S. (Oregon and California) 2 
Palpal tibia not cylindrical, diameter in lateral view much 
greater at 1/3 the distance from proximal to distal end than 
near distal end (Figs. 10-13). Metatarsus I with 1 to 4 macro- 
setae on ventral surface, usually clustered at distal end (Figs. 
68-70). AL spinnerets 1/3 or more as long as PM (Fig. 31). 
Abdomen purplish grey or purplish brown riversi 
Palpal tibia swollen in cylindrical form of nearly equal diameter 
for most of its length (Fig. 15). Metatarsus I with ill-defined 
ventral longitudinal rows of macrosetae extending nearly its 
entire length (Figs. 75-77). AL spinneret 1/5 or less (may 
be extremely reduced and difficult to spot) as long as PM 
(Fig. 30). Abdomen pale grayish yellow or pale gray 
gertschi 
Females 
Sternum (not including labium) as wide as long (Fig. 38). 
Fewer than 13 enciform macrosetae on metatarsus I. Fewer 
than 7 microteeth per chelicera (Fig. 43). Wide seta-less area 
on ectal side of anterior portion of cheliceral macrotooth row. 
Eastern U. S. (Illinois and Missouri) hadros 
Sternum (not including labium) clearly longer than wide (Figs. 
36, 40). More than 13 enciform macrosetae on metatarsus I. 
Usually more than 7 microteeth per chelicera (Figs. 41, 42). 
Seta-less area on ectal side of anterior portion of cheliceral 
macrotooth row very narrow or absent. Western U. S. (Ore- 
gon and California) 2 
