THE ORB-WEAVER GENERA SINGA AND HYPSOSINGA 
IN AMERICA (ARANEAE: ARANEIDAE)* 
By Herbert W. Levi 
Museum of Comparative Zoology, Harvard University 
The North American spiders commonly placed in Singa belong 
to four different genera. It was first thought best to publish on these 
species together with the small species of Araneus. However, the 
slowness with which the Araneus studies proceed makes it advisable 
to publish on Singa and Hypsosinga first. 
Most of the specimens of these genera belonging to the American 
Museum appear to be lost and only small collections other than those 
of the Museum of Comparative Zoology were available. I would 
like to thank the following for loan of additional specimens: Dr. 
J. A. Beatty; Mr. D. E. Bixler; Mr. D. Buckle; Dr. J. A. L. 
Cooke for collections of the American Museum of Natural History 
and Cornell University; Dr. R. Crabill for specimens from the 
U.S. National Museum; Dr. B. Cutler; Dr. C. D. Dondale of the 
Canada Dept, of Agriculture; Dr. B. J. Kaston; Dr. W. W. 
Moss for collections from the Academy of Natural Sciences, Phila- 
delphia; Dr. W. Peck for specimens from the Exline collection; 
Dr. J. Proszynski for collections of the Polish Academy of Sciences; 
Miss Susan Riechert; Mr. V. Roth; Dr. W. Shear; Dr. C. Triple- 
horn of Ohio State University; Prof. S. L. Tuxen for specimens 
from the Zoological Museum of the University of Copenhagen; Dr. 
J. D. Unzicker for specimens from the Illinois Natural History 
Survey; Prof. M. Vachon and Dr. M. Hubert for collections of 
the Museum National d’Histoire Naturelle, Paris; Dr. B. Vogel; 
and Dr. H. K. Wallace. I am also indebted to Mr. J. Denis, Mr. 
G. Puhringer, and especially to Miss Susan Riechert for helpful 
information. The research and publication were supported by Public 
Health Service Grant AI-01944 from the National Institute of 
Allergy and Infectious Diseases. 
Singa C. L. Koch 
Singa C. L. Koch, 1836, Arachniden, vol. 3, p. 42. Type species Singa hamata 
(Clerck) designated by Thorell, 1869. On European Spiders, p. 58. The 
name is of feminine gender. 
Diagnosis . The anterior median eyes are the largest, the posterior 
medians the same size or smaller, the laterals about 0.6 diameter of 
the anterior medians. In Singa the median ocular quadrangle is wider 
*Manuscript received by the editor February 8, 1972. 
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