No. 1.] ATTID.K OF CENTRAL AMERICA. 69 



which run obhquely forward from the spots. The hairs being 

 nearly all gone, these spots appear dark under alcohol, as seen 

 in the figure. The legs, palpi and falces are all dark brown. 



AVe have a single male, from Panama, sent to us by Count 

 Keyserling. 



HABROCESTUM (e. simon). 



The cephalothorax is convex, high and rather short, and 

 widens out a little in the thoracic part. The cephalic part is 

 inclined forward. The thoracic remains level or slopes very 

 gradually for some distance behind the dorsal eyes. The sides 

 are vertical or nearly vertical in front, and slant outward in 

 the thoracic part. The quadrangle of the eyes is equally wide 

 in front and behind, is one-third wider than long and occupies 

 two-fifths of the cephalothorax. The anterior eyes are in a 

 straight or slightly curved row, the middle being twice or nearly 

 twice as large as the lateral, which are separated from them. 

 The second row is usually half-way between the first and the 

 third. The third row is as wide or nearly as wide as the cepha- 

 lothorax at that place. 



The females of this genus resemble each other closely. The 

 males are more brightly colored and have a strong tendency 

 to leg variation, the first or the third, or both the first and the 

 third legs being often ornamented with tufts and fringes of 

 variously colored hairs, and with apophyses. The palpi of the 

 males are much alike, the bulb being short and almost circular 

 in form. 



Habrocestum is near Sai.tis, but the quadrangle is never 

 wider in front than behind, and, so far as we know, the third 

 leg is always longer than the fourth. 



We consider Habrocestum a good representative of the 

 group which includes Saitis, Euophrys, Attus, Oyrba, Heliophanus 

 and the allied genera. The species are of medium size or 

 smaller, and have a wide distribution. They are very numer- 

 ous throughout the United States. We give a drawing of H. 

 auratum, Hentz, as fairly typical of the genus. (PI. V, figs. 4-4b.) 



