16 PECKHAM. [Vol. 3. 



42. Legs,- 3412 or 3412, 43 



Legs, 4312, 4312, 4321, or 4312, . . . . 47 



43. Cephalic part as long as thoracic, .... 44 

 Cephalic part plainly shorter than thoracic, . . 45 



44. First row of eyes curved downward, . Pensacola signata. 

 First row of eyes curved upward, Amycus fallax (page 22 



45. Abdomen with white basal band and oblique white 



bands on sides, ....... 46 



Abdomen without basal band and oblic^ue bands on 

 sides, .... Habrocestum latens (page 60 



46. Cephalothorax- with three white longitudinal lines, 



Habrocestum mexicanum (page 61 

 Cephalothorax without white longitudinal lines, 



Habrocestum belligerum (page 60 



47. Spiders about 9 mm. long, 48 



Spiders not more than 7 mm. long, ... 49 



48. Abdomen with central white longitudinal band, on 



either side of which, at posterior end, are two white 

 spots surrounded with black, .... 



Hasarius bellicosus (page 56 



Abdomen with wide white scalloped basal band, but 

 no longitudinal band, . Escambia conspecta (page 42 



49. Spiders pale in color and small, about 4.5 mm. long ; 



legs, 4312, . . . Nagaina incunda (page 55 

 Unlike the above, ...... 50 



50. Abdomen with two oblique white marks on a black 



background on each side of the posterior part of 

 the dorsum ; legs, 4312, Escambia parvula (page 44 

 Unlike the above, ....... 



51. Cephalothorax wider at dorsal eyes than behind, 



Sidusa recondita (page96 

 Cephalothorax widest behind dorsal eyes, 



. Euophrys newtonii (page 64 



