1979] 
Brady — Spider Genus Trochosa 
197 
Labium and endites yellow with distal ends lighter yellow to 
cream. Sternum pale yellow to cream. 
Measurements. Ten females and ten males from Utah. 
Females: 
Mean 
Range 
Mean 
Range 
Ant. Eye Row 
.862 
.78- 
.91 
Femur I 
3.32 
2.8- 3.7 
PME 
1.031 
.90- 
1.10 
Pat.-Tibia I 
4.28 
3.6- 4.8 
PLE 
1.346 
1.21- 
1.49 
Meta. I 
2.36 
2.0- 2.7 
POQ 
.938 
.85- 
.98 
Tarsus I 
1.50 
1.4- 1.6 
Total I 
11.45 
9.9-12.9 
Carapace 
Width 
3.80 
3.2 - 
4.3 
Femur IV 
4.08 
3.5- 4.5 
Carapace 
Length 
5.26 
4.4 - 
5.8 
Pat.-Tibia IV 
4.82 
4.2- 5.4 
Body Length 
11.70 
10.0 - 
13.0 
Meta. IV 
4.33 
OO 
1 
OO 
rn 
Pat.-Tibia II 
3.92 
3.6 - 
4.4 
Tarsus IV 
1.81 
1.6- 2.0 
Pat.-Tibia III 
3.48 
3.0 - 
3.9 
Total IV 
15.04 
13.2-16.4 
Males: 
Mean 
Range 
Mean 
Range 
Ant. Eye Row 
.721 
.70- 
.75 
Femur I 
2.72 
2.5- 2.8 
PME 
.879 
.84- 
.92 
Pat.-Tibia I 
3.58 
3.4- 3.9 
PLE 
1.110 
1.04- 
1.16 
Meta. I 
2.18 
2.0- 2.4 
POQ 
.808 
.76- 
.89 
Tarsus I 
1.40 
1.3- 1.5 
Total I 
9.88 
9.2-10.5 
Carapace 
Width 
3.02 
2.8 - 
3.2 
Femur IV 
3.42 
3.2- 3.6 
Carapace 
Length 
4.20 
3.9 - 
4.5 
Pat.-Tibia IV 
4.19 
3.8- 4.4 
Body Length 
8.50 
7.4 - 
9.4 
Meta. IV 
3.84 
3.6- 4.0 
Pat.-Tibia II 
3.25 
3.1 - 
3.4 
Tarsus IV 
1.65 
1.5- 1.8 
Pat.-Tibia III 
2.92 
2.7 - 
3.0 
Total IV 
13.09 
12.2-13.7 
Diagnosis. Trochosa gosiuta is similar to avara and shenandoa in 
size and coloration. Unlike the latter two species gosiuta specimens 
do not have the two dark dashes within the broad median stripe 
(compare Figs. 3 and 5 with Fig. 4). Trochosa gosiuta is most like 
shanandoa in the structure of the epigynum and the male palpal 
organ. The anteriorly directed ends of the transverse arms of the 
epigynum in gosiuta are narrower and less heavily sclerotized than 
in shenandoa (compare Fig. 27 with Figs. 18, 23, 25). The males of 
gosiuta can be most easily distinguished from shenandoa by the size 
and length of the ventral macrosetae on tibia I. These macrosetae 
