Superfamily Argiopoidea 



inch. It has been found in Colorado, Arizona, New Mexico, and 

 Utah. 



Allocosa noctuabunda (A. noc-tu-a-bun'da). — This species 

 occurs in the Gulf States. 



Genus SCHIZOCOSA (Schiz-o-co'sa) 



This genus has been separated from Lycosa on account of 

 peculiar features of the external reproductive organs. In the 

 female the lateral extensions of the guide of the epigynum are 

 divided so as to be double (Fig. 726). In the male the embolus 

 is distinctly elbowed and the terminal apophysis of the bulb of 



Fig. 726. EPIGYNA OF SCHIZOCOSA 

 a, S. ocreata. b, S. bilineata c, S. saltalrix (after Chamberlin) 



the palpus is conspicuously elevated and usually more or less 

 produced into a horn-like process extending beyond the front mar- 

 gin of the alveolus. 



This genus includes spiders of medium or of small size. In 

 them "the median light band of the cephalothorax widens uni- 

 formly from behind forward to the eyes; it is constricted in front 

 of the dorsal groove, but otherwise its margins are nearly straight. 

 The abdomen in all is marked above by a broad light band which 

 is nearly or fully as wide as the dorsum and which extends over 

 its entire length from base to spinnerets; this band encloses at 

 base a lanceolate outline, and behind in some also^ a series of 

 transverse angular lines of varying degrees of distinctness; sides 

 of the abdomen dark in colour, black at least across anterior lateral 

 angles; the venter is pale. The cocoon is spherical, without 

 any seam at the equator, and is white in colour" (Chamberlin). 



647 



