246 
Psyche 
[December 
Note. The only character of possible diagnostic value mentioned 
by Chamberlin and Ivie for S. melania is that the anterior lateral 
eyes are larger than the posterior laterals. This size difference among 
lateral eyes may be found in S. variabilis and not in other species 
of Singa. 
Description. Female from Michigan. Total length 4.0 mm. 
Carapace 1.5 mm long, 1.3 mm wide. First femur, 1.2 mm; patella 
and tibia, 1.5 mm; metatarsus, 1.0 mm; tarsus, 0.5 mm. Second 
patella and tibia, 1.3 mm; third, 0.9 mm; fourth, 1.4 mm. 
Male from Michigan. Total length 2.2 mm. Carapace 1.3 mm 
long, 1.0 mm wide. First femur, 1.2 mm; patella and tibia, 1.3 mm; 
metatarsus, 0.9 mm; tarsus, 0.5 mm. Second patella and tibia, 1.2 
mm; third, 0.7 mm; fourth, 1.0 mm. 
I'ariation. The coloration of the abdomen is from black to 
yellowish white, the light specimens may have four dorsal black 
spots on the abdomen, rarely two bands (Fig. 54). The females 
are 2. 9-3. 9 mm total length, carapace 1. 0-1.5 mm wide. Males are 
2. 2-2. 6 mm total length, carapace 1 .0-1.9 mm wide. The largest 
specimens come from the northern part of the range, the smallest 
from the southern. 
Diagnosis. Hypsosinga variabilis is closest to H. sanguinea of 
Eurasia, the long embolus (Figs. 55-57), the wide median septum 
of the epigynum (Figs. 47, 49) of H. variabilis separates it from 
other American species. 
Natural History. The only observations are from sweeping it 
from a wet meadow in Minnesota, and roadside grass in Manitoba; 
vegetation bordering canal in Florida. The males are mature in 
May and June, females have been collected adult in May to July, 
in August to February in Florida. 
Distribution. From Alaska and Cartwright, Labrador to Havana, 
Cuba (Map 2). 
Hypsosinga singaeformis (Scheffer) 
Figures 58-71; Map 3 
Araneus singaeformis Scheffer, 1904, Entomol. News, vol. 15, p. 259, pi, 17, 
figs. 4-6, $. Female syntypes from Wallace County, Kansas in the 
Museum of Comparative Zoology; examined. 
Singa schefferi Banks, 1910, Bull. U.S. Natl. Mus., vol. 72, p. 40. New name 
since Araneus schefferi thought preoccupied by Epeira singaeformis 
Hasselt, 1882. 
Singa singaeformis, — Roewer, 1942, Katalog der Araneae, vol. 1, p. 878. 
Singa orotes Archer, 1951, Amer. Mus. Novitates, no. 1487, p. 41, figs. 36, 
37, 61, $. Male holotype from Regnier, Colorado [48 km south and 
