No. 3.] SSPIDER8 OF THE HOMALATTUH GROUP. 175 



third rows. The dorsal eyes are usually larger than the lateral 

 and form a row which is as wide as the cephalothorax at that 

 place. 



The relative length of the legs is variable. 



We have of this genus, the type species, reticulatus Black- 

 well, from France and Germany (Simon's Arachnides de 

 France, Vol. III., p. 210), nellii P., from Pennyslvania, U. S., 

 N. A. Attidse, p. 88, and pompatus P., Attidse of St. Vincent, 

 Proc. Zool. Soc. of London, Nov. 21, 1893, p. 703. M. Simon 

 describes three species besides reticulatus, in Arachnides de 

 France. 



SIDUSA GEN. NOV. 



The cephalothorax is very high, and is plainly longer than 

 wide. The widest point is at the first row of eyes. It contracts 

 a little in the cephalic part and widens out again in the 

 thoracic. The sides are nearly vertical in front and round out 

 a little behind the dorsal eyes. The cephalic part is inclined 

 forward ; the thoracic rounds off gently for a short distance 

 behind the dorsal eyes and then falls a little more abruptly. 



The quadrangle of the eyes is plainly wider in front than 

 behind, is one-fourth wider than long, and occupies three-fifths 

 of the cephalothorax. The anterior ej^es are very large and 

 bulge forward prominently, the lateral being two-thirds as large 

 as the middle eyes. This row is slightly curved. The second 

 row is a little nearer the third than the first row. The dorsal 

 eyes are as large as the lateral, and are also very prominent. 

 They form a row as wide as the cephalothorax at that place. 



The relative length of the legs is 34 12. 



The interesting new sjDecies which forms the type of this 

 genus was very kindly sent us, with only the generic name 

 prefixed, by M. Simon. 



SIDUS.i GRATIOSA SP. NOV. 



Plate XVI., Figs. 10— lOe. 

 S . Total length, 4.2. Length of cephalothorax, 2 ; 

 width of cephalothorax, 1.5. 



