14 , PECKHAM. [Vol. 3. 



25. Both cephalothorax and abdomen very flat and thin ; 



spiders about 5 mm. long, . . Eudra geniculata. 

 Abdomen thickened and rounded ; spiders about 7 

 mm. long, Rudra polita. 



26. Abdomen with wavy bands and indistinct spots, 



Dendryphantes centralis (page 49 



Abdomen with four pairs of black spots edged with 

 white, . . Dendryphantes hondurensis (page 48 



27. Legs, 3142, . . . Amycus benignus (page 18 

 Unlike the above, .28 



28. Fourth legs longest, then first, .... 29 

 Third and fourth legs longer than first and second, 38 



29. Spiders usually less than 6 mm. long ; cephalic part 



as long or nearly as long as thoracic, ... 30 

 Spiders usually more than 6 mm. long ; cephalic 

 part plainly shorter than thoracic, ... 34 



30. Cephalic part occupying plainly more than half of 



cephalothorax, ....... 31 



Cephalic part occupying half or a little less than 

 half of cephalothorax, ..... 32 



31. Abdomen luarked with central longitudinal band 



throughout its length, Zygoballus strenuus (page 92 



Abdomen marked with wavy white lines, 



Zygoballus minutus (page 90 



32. Quadrangle of eyes plainly wider behind than in front, 



Dendryphantes dubitabilis (page 52 

 Quadrangle of eyes ecjually wide in front and behind 

 or wider in front, ...... 33 



33. Abdomen with transverse white bands ; quadrangle 



of eyes wider in front, . Hamillus radians (page 72 

 Abdomen without transverse white bands ; quad- 

 rangle of eyes equally wide in front and behind, 



Tulpius hilarus (page 87 



