Superfamily Argiopoidea 



distinct light-coloured median stripe. The epigynum is simple, 

 presenting no true guide, or but weakly furrowed, the spermathecae 

 opening free posteriorly. The bulb of the male palpus bears an 

 apophysis which is exterior in position. 



Only four species are known to occur in our fauna. These 

 are separated by Chamberlin as follows: 



KEY TO SPECIES OF ALLOCOSA 



A. All joints of legs except femora clear yellow, without any 



darker annulations or markings except at the ends of the 



tibiae of the fourth legs. P. 646. A. rugosa 



AA. Legs beyond femora more or less distinctly annulate with 



dark. 



B. Anterior row of eyes longer than the second; anterior 



median eyes not more than one fifth their diameter 



apart; anterior tibiae armed neither in front nor behind, 



and the ventral spines minute. P. 647. 



A. noctuabunda 



BB. Anterior row of eyes shorter than the second; anterior 



median eyes their radius or nearly so apart; anterior 



tibiae armed in front and behind and the ventral spines 



longer. 



C. Femora of first legs solid black above, a sub-basal 



brown band on the others. P. 646. A. funerea 



CC. Femora of first legs not solid black, marked with three 



black rings. P. 646. A. parva 



Allocosa rugosa (A. ru-go'sa). — This is the only Northern 

 species; it has been found in Maryland, Pennsylvania, and 

 the District of Columbia. The male measures a little less than 

 one fifth inch in length; the female a little less than one 

 fourth inch. 



Allocosa funerea (A. fu-ne're-a).— - This is the best-known of 

 the Southern species. It has been found in Alabama, Georgia, 

 and Louisiana. The female measures a little more than one fifth 

 inch in length. 



Allocosa parva (A. par'va). — This is our largest species; 

 the male measures one fourth inch in length; the female, one third 



646 



