78 
Psyche 
[June 
0.50 mm wide. First patella and tibia 0.60 mm ; second 0.48 mm ; 
third O.39 mm. Fourth femur 0.59 mm; patella and tibia 0.7 1 mm; 
metatarsus 0.44 mm. Total length of male 1.4 mm. Carapace 0.52 
mm long, 0.58 mm wide. First femur 0.65 mm; patella and tibia 
0.66 mm ; metatarsus 0.32 mm ; tarsus 0.36 mm. Second patella and 
tibia 0.50 mm ; third 0.39 mm ; fourth 0.65 mm. 
Diagnosis. Genitalic structure (Figs. 3-5), brown carapace and 
absence of black eye area separate this species from S. bicolor and 
others. 
Record. $ paratype collected with cf holotype. 
Stemmops servus sp. n. 
Figures 9-12 
Type. Male holotype from Forest Preserve, Panama Canal Zone, 
29 Jan. 1958 (A. M. Chickering) in the Museum of Comparative 
Zoology. The specific name is an arbitrary combination of letters. 
Description. Female with carapace yellow, dusky on sides, eye 
region black, sternum gray, legs yellow, abdomen gray with white 
spot above spinnerets. Male with carapace dark brown, sternum 
black, palpi colorless light. First and second coxae black, third and 
fourth yellow-white ; all trochanters yellow-white ; other leg segments 
black, except proximal half of fourth femora yellow-white. Abdomen 
black with white spot above spinnerets. Carapace subcircular. Ante- 
rior median eyes slightly smaller than others, about two-thirds their 
diameter apart, touching laterals. Posterior median eyes one diameter 
apart, touching laterals. Total length of female 1.2 mm. Carapace 0.5 
mm long, 0.5 mm wide. First patella and tibia, 0.6 mm ; second, 0.6 
mm; third, 0.5 mm. Fourth femur, 0.6 mm; patella and tibia, 0.7 
mm; metatarsus, 0.4 mm; tarsus, 0.3 mm. Total length of male 1.0 
mm. Carapace, 0.5 mm long; 0.5 mm wide. First femur, 0.6 mm; 
patella and tibia, 0.7 mm ; metatarsus, 0.4 mm ; tarsus, 0.4 mm. Sec- 
ond patella and tibia, 0.5 mm; third, 0.4 mm; fourth, 0.7 mm. 
The male and female have not been collected together. But the 
structure, particularly of the carapace and eye region, is very similar. 
The coloration, however, differs; the female is lighter. 
Diagnosis. The coiled embolus of the palpus (Fig. 9) separates 
this species from other Stemmops. The epigynum (Fig. 12) has no 
distinguishing marks and the ducts could be found only under a 
compound microscope ( Fig. 1 1 ) . 
Records. Panama Canal Zone: Forest Preserve, Jan., Feb. 1958, 
$ (A. M. Chickering). 
