76 PECKHAM. [Vol. 2, 



Color. Cephalothorax and abdomen black, with a white 

 spot low down on each side in the thoracic constriction and a 

 white band around the constriction of the abdomen. Legs and 

 coxse of the first and second pairs light brown ; of the third 

 and fourth, dark brown. Falces, mouth parts and sternum dark 

 brown. 



Habitat. Madagascar. 



SYNEMOSYNA HENTZ, 1832. 



Cephalothorax low, twice as long as wide, rounded and 

 narrower behind. There is a deep constriction near the middle 

 of the thoracic part. Quadrangle of eyes but little wider than 

 long, a little wider behind than in front, occupying one-third of 

 the cephalothorax. Anterior eyes in a curved row, middle eyes 

 touching and very large, two and a half to three times as large 

 the lateral, which are a little separated from them. Second 

 row a little nearer the first than the third row. Dorsal eyes a 

 little larger than the lateral. Third row as wide as the cephalo- 

 thorax at that place. Lip about as wide as long. 



This genus is found only in North and South America. 

 We have not seen the species placed here by Drs. L. Koch and 

 Thorell, but judging from their descriptions they should not 

 be included in this genus. Hentz used Synemosyna in a much 

 wider sense than Ave do ; in fact, he made it broad enough to 

 include all ant-like Attinte. 



The spiders of this genus are perhaps the most ant-like of 

 the whole group, and are not easily distinguished from ants, 

 even by a naturalist. The most striking characteristics of the 

 genus are the very large middle ej^es of the first row and the 

 deep constriction in the cephalothoi-ax. The relative length of 

 the legs in all the species and in both sexes is 4312, and there 

 is a hardened plate on either the upper or the under surface of 

 the abdonaen. It is readily distinguished from other genera 

 of AttiuEe by the relative size of the middle and lateral eyes of 

 the first row. Tola (Madagascar) is very near Synemosyna, but 

 the middle ej'es are less than two and a half times the lateral, 

 and there is no hard part on the abdomen. Had Tola cowanii 



