No. 1.] ATTID.F. OF CENTRAL AMERICA. 13 



17. Legs, 4312 ; abdomen with distinct white spots on a 



red ground, . . Pachomius Dybowskii (page 81 

 Legs, 4812; abdomen dark brown, with bands and 

 spots of yellowish red and white, .... 

 Esdimbia alacris (page 46 



18. Legs, 1432 ; long, slender spiders, with low cephalo- 



thorax, . . . ... . . Itata vadia 



Unlike the above, . . . . . .19 



19. First legs longest, 20 



Third or fourth leg longest, ..... 27 



20. Spiders stout and heavy, with high cephalothorax ; at 



least 9 mm. long, . 21 



Spiders smaller, about 7 mm. long, . . . -22 



21. Abdomen with four pairs of white dots on dorsum and 



several oblique white bands on each side, 



Parna-'nus cyanidens (page 38 



Abdomen with two pairs of abbreviated white lines 

 on each side of middle, near spinnerets, 

 Phidippus orichalceus. 



22. Quadrangle of ej^es occupying more than half of the 



cephalothorax, ....... 23 



Quadrangle of eyes occupying plainly less than half 

 of cephalothorax, 24 



23. Abdomen pale with two longitudinal dark bands ; 



second, third and fourth pairs of legs pale yellow, 



Messua desidiosa (page 94 

 Abdomen and posterior legs mottled, . Beata magna. 



24. Cephalothorax low, flat ; quadrangle of eyes occupying 



about one-third of cephalothorax ; first pair of legs 



much the stoutest, 25 



Cephalothorax rather high, not fiat ; quadrangle of 

 eyes occupying from two-fifths to one-half of cepha- 

 lothorax ; first pair of legs only a little thickened, 26 



