No. 1.] ATTIDjE of central AMERICA. 31 



Different examples vary in color as well as in size, the 

 smaller ones being much paler than the larger. In the large 

 ones the cephalothorax is a bright reddish brown, with red 

 hairs around the eyes and on tlie sides of the cephalic part. 

 The abdomen is light brown. On the front part are two parallel 

 darker streaks, and behind are two pairs of large dark spots, 

 and, between these, a series of small dark chevrons. Around 

 and between the darker parts is a covering of light-colored iri- 

 descent hairs. The falces are bright brown, like the cephalo- 

 thorax. The palpi and legs are light yellowish brown, the 

 femur of the palpus having, where it bends, a patch of snow- 

 white hairs above. The first leg has the femur and the ends 

 of the patella and tibia bright brown, contrasting strongly with 

 the paler color, which lies next. 



The first leg in the large variety is longer than in the 

 smaller one, exceeding the third leg by the length of the tarsus 

 and metatarsus, while in the other case it is longer by only the 

 tarsus. 



We have seven males from Panama, in the Keyserling 

 Collection. 



HELORUS PLAVENS, SP. NOV. 



Plate 11, figs. 3-3c. 



S . Length, 5.5. Length of cephalothorax, 2.6 ; width 

 of cephalothorax, 2. 

 Legs, 1342 ; the first pair plainly longest, stoutest and 

 darkest in color. The palpus and the first and 

 second legs are set unusually far back. 



In this species the sides of the cephalic part are vertical, 

 the third row of eyes being as wide as the cephalothorax at 

 that place. Behind the dorsal eyes the sides round out, quite 

 suddenly, to their widest point, opposite the coxse of the second 

 pair of legs. The quadrangle of the eyes is about one-third 

 wider than long, and occupies a little more than two-fifths of 

 the cephalothorax. The anterior eyes are all close together, in 

 a straight row, the middle eyes being less than twice as large as 



