2 32 
Psyche 
[December 
proliferation of names without meaning for relationships. They are 
obviously monophyletic. 
Singa calix belongs to a South American genus, one of the largest 
genera of orb weavers in the Americas. As far as I know at present, 
the oldest name is Alpaida O. P. -Cambridge, 1889. But numerous 
other generic names have been used for this genus; Lariniacantha 
Archer (1951, Amer. Mus. Novitates, no. 1487, p. 15) most re- 
cently. The genus is much closer to Acanthepeira than to Singa. 
However, I am still hestitant about the placement until I have more 
knowledge of the webs and habits of the species in the genus. 
Key to American Species of Singa 
1 a. Base of epigynum trapezoidal, with sides sclerotized (Figs. 11- 
14) ; median apophysis of palpus with one hook (Figs. 23, 24) 
keyserlingi 
ib. Base of epigynum with a lobe on each side (Fig. 25) ; median 
apophysis of palpus with two hooks (Figs. 33, 34) eugeni 
Singa hamata (Clerck) 
Figures 1-8 
Araneus hamatus Clerck, 1757, Aranei Svedici, p. 51, pi. 3, fig. 4. Female 
type specimens from Sweden believed lost. Bonnet, 1955, Bibliographia 
Araneorum, vol. 2, p. 513. 
Singa hamata, — C. L. Koch, 1836, Die Arachniden, vol. 3, p. 42, figs. 197, 
198, 9 , $. Wiehle, 1931, in Tierwelt Deutschlands, vol. 23, p. 42, 
figs. 54-57, 9 , $ . Roewer, 1942, Katalog der Araneae, vol. 1, p. 873. 
Locket and Millidge, 1953, British Spiders, vol. 2, p. 157, figs. 102b, 
103c, 105c, 9, $. 
This species, very similar to the two American ones, is known 
only from Eurasia. 
Singa keyserlingi McCook 
Figures 9-24, Map 1 
Singa keyserlingi McCook, 1893, American Spiders, vol. 3, p. 230, pi. 19, 
fig. 2, 9. Female holotype from St. Louis, Missouri, in the Academy 
of Natural Sciences, Philadelphia; examined and labelled as type. 
Singa campestris Emerton, 1915, Trans. Connecticut Acad. Sci., vol. 20, 
p. 153, pi. 3, fig. 3, $. Male syntype from Rat Portage, Ontario, in 
the Museum of Comparative Zoology; examined, new synonymy. 
Note. McCook described S. keyserlingi as a new species. How- 
ever, in the first paragraph of the description he finds it necessary 
“to propose a new name” for the species Keyserling illustrated and 
called erroneously Singa rubella (Hentz). The specimens McCook 
