No. 1.] ANT-LIKE SPIDERS OF THE FAMILY ATTIDjE. 11 



been found in America these slight differences would scarcely 

 have justified the formation of a new genus. 



SYNEMOSYNA FORMICA HENTZ, 1845. 



PI. VI., Fig. 4, female ; 4a, side of cephalothorax, early 

 moult ; 4b, face and eyes, same moult ; 4c and 4d, side of 

 cephalothorax, and face and eyes of later moult ; 4e, side 

 view of adult female ; 4f, face and falces of adult ; 4g, mouth 

 parts of male ; 4h, epigynum ; 4i and 4j, male palpus ; 4k, 

 under side of front of abdomen of male. 



S . Total length, 3.9 mm. 



Cephalothorax : Length, 2 mm. ; width, .7 mm. 



Legs, 4312 ; equally stout. 



1st leg longer than 2d by tarsus. 



4th leg longer than 3d by tarsus and metatarsus. 



9 . Total length, 5.4 mm. 



Cephalothorax : Length, 2.2 mm. ; width, .8 mm. 

 Legs like those of male. 



Cephalothorax low; cephalic part strongly inclined for- 

 ward ; thoracic with one constriction a little waj' behind the 

 dorsal eyes, and another just in front of the posterior bor- 

 der. Abdomen much longer than cephalothorax, with a deep 

 constriction in front of the middle, posterior to which it is 

 enlarged and rounded. The anterior end of the abdomen has 

 the integument hardened in the middle, and has also a hard 

 piece on the under surface, which extends upward on each side 

 so that the edges are visible from above. The posterior end of 

 the abdomen is widened and rounded. The anterior row of 

 eyes is a little curved. The middle are three times as large at 

 the lateral, and touch each other, while the lateral are a little 

 separated from them. Falces short, vertical, parallel and weak. 

 Coxte I separated by width of lip. Lip as wide as long. 



Color. Cephalothorax brown, lighter on the upper sur- 

 face, somewhat blackish on the sides, with a few short, white 

 hairs in the eye region, a large, central white spot just in front 

 of the anterior constriction, and a white band in the constric- 

 tion on each side, which is narrower above than below. Abdo- 



