130 
Psyche 
[September 
that separates them from other lycosids, namely, the greater length of 
the posterior pair of spinnerets. If the greater length of the spinnerets 
is concomitant with web-spinning habits, then it would seem that this 
assemblage might constitute a natural group deserving subfamilial 
rank. If, however, the length of the spinnerets does not indicate a 
web-spinning function, but is simply a structural convergence found in 
otherwise diverse groups, it should not be used as a criterion to estab- 
lish a subfamily. It may be that some species of Enprosthenops placed 
in the Pisauridae also belong to this group since the genitalia are simi- 
lar to those of Lycosidae and the eye arrangement resembles that of 
Porrima. 
Acknowledgements. This investigation was carried out as a gradu- 
ate research program under the direction of Dr. H. W. Levi of the 
Museum of Comparative Zoology to whom I am especially indebted 
for encouragement, helpful advice, and constructive criticism. I thank 
sincerely Dr. W. J. Gertsch of the American Museum of Natural 
History, who placed the collections of his institution at my disposal. 
I thank also Dr. H. K. Wallace of the University of Florida for 
making large collections from Florida available for study. Measure- 
ment of Wallace’s specimens was not undertaken because the paper 
was near completion at the time of their arrival. Study of these speci- 
mens elucidates certain facts that I will stress, and supports the con- 
clusions already reached before their arrival. Locality data was uti- 
lized and certain structural features were checked. Mr. J. A. Beatty 
provided a number of specimens from Arizona and Sonora and sup- 
plied ecological data for S. calif ornicus. I am grateful to Dr. G. Owen 
Evans and to Mr. D. Clark of the British Museum, Natural Flistory, 
for loan of the male of S. mexicanus. Collections in the field during 
the summer of 1961 were made possible by a grant from the Sigma 
Xi-RESA Research Fund. A National Institutes of Health Grant 
(E-1944) helped defray some of the expenses. 
Sosippus Simon 
Sosippus Simon, 1888, Ann. Soc. Ent. France, 8 (6) : 206. 
Types species: The problem of the type species has been discussed 
by Bonnet (1958). I follow him for the sake of nomenclatural stabil- 
ity. Simon (1888) established the genus Sosippus and designated 
Doloinedes oblongus C. L. Koch as the type. At the same time he 
described Sosippus mexicanus as a new species. In 1898 Simon trans- 
ferred D. oblongus to the genus Lycosa (Diapontia) and established 
