Superfamily Argiopoidea 



DD. Head and thorax not separated by a well-marked 

 complete cervical groove. 

 E. Abdomen with a horny shield. P. 455. 



Cercidi a 

 EE. Abdomen without a horny shield. 



F. Abdomen with a median hump or cone at the 

 base, as well as lateral projections. P. 455. 



Marxia 

 FF. Abdomen without median together with lateral 

 projections. 

 G. Posterior median eyes nearly or quite as close 

 to the posterior lateral eyes as to each other. 

 P. 457. Zilla 



GG. Posterior median eyes much closer to each 

 other than to the posterior lateral eyes. 

 H. The tibiae of the first and second pairs of 

 legs without spines above. 

 I. Abdomen with spines or humps. P. 460. 



Wagneriana 



II. Abdomen without spines or humps. P. 



461. Metazygia 



HH. The tibiae of the first and second pairs of 



legs with some spines above, at least one. 



I. Abdomen as high behind its middle as at 



its base, and elliptical in outline or 



broader behind the middle. Small 



species with short legs. P. 461. 



Singa 

 II. Abdomen highest toward its base, and 

 usually broadest near the base. 

 J. Abdomen with cusps or tubercles behind. 

 K. Abdomen with several marginal tuber- 

 cles behind. P. 465. Verrucosa 

 KK. Abdomen without marginal tubercles 

 behind; but with two round black 

 tubercles on the middle line of the 

 hind part of the abdomen. P. 503. 



Friophora 

 JJ. Abdomen of various forms but without 

 tubercles behind. 



445 



