42 PECKHAM. [Vol. 3. 



widening a little from above below; in the cephalic part they 

 are sometimes slightly concave. The cephalic part is plainly 

 inclined forward. The thoracic is sometimes very slightly in- 

 clined backward in the first half, and sometimes rounds off more 

 decidedly behind the dorsal eyes. The quadrangle of the eyes 

 is ec|ually wide in front and behind, or a little wider in front ; 

 it is about one-fourth wider than long, and occupies two-fifths, 

 or a little more, of the cephalothorax. The anterior eyes are 

 rather large, and are usually a little separated ; they most 

 commonly form a straight or very slightly curved row, of which 

 the middle are nearly twice as large as the lateral. The second 

 row is about half-way between the first and the third. The 

 third row is as wide or nearly as wide as the cephalothorax at 

 that place. The legs are all of about the same length. 



This genus presents some difficulties, as there is a good 

 deal of variation, not only among the different species, but 

 between the two sexes. The males fall more steeply than the 

 females behind the dorsal eyes, and have the sides more 

 rounded out. Among the females conspeda falls most abruptly, 

 in the thoracic part, and ahicris next, while in parvula the fall 

 is very slight indeed. 



Escambia bears a close resemblance to Dynamius, especially 

 in some of the species, as conspeda. In Dynamius, however, the 

 cephalothorax is flat on the upper surface for some distance 

 behind the dorsal eyes, and the first row of eyes is plainly 

 curved. 



ESCAMBIA CONSPECTA, SP. NOV. 



Plate III, figs. 3-3e. 



S . Length, 7. Length of cephalothorax, 4 ; width of 

 cephalothorax, 2.7. 



9 . Length, 9. Length of cephalothorax, 4.3 ; width of 

 cephalothorax, 3. 

 Legs, 4321 in both sexes ; first and second pairs stout- 

 est, and having, in the male, heavy fringes of hair. 



Both males and females vary a good deal in size. 



