328 Wisconsin Academy of Sciences, Arts and Lettirs. 



Labium contracted in front, longer than half the length of the maxilla 



margin in front straight. 

 Sternum plane, rounded. 

 Abdomen long and contracted. 

 Legs spined, 1, 4, 2, 3 or 4, 3, 1, 2. First pair of legs scarcely stouter than 



the others. Patella and tibia of the third shorter than the patella 



and tibia of the fourth. Metatarsus and tarsus of the fourth not 



longer than the patella and tibia. 



THEROSA Keyserling. 1882. 

 Therosa Keyserling, Arachniden Australiens, p. 1413. 



Cephalothorax one quarter longer than wide, not contracted in front 

 rounded behind, a little wider at the dorsal eyes, above convex. 



Clypeus very low. 



Quadrangle of eyes wider than long, wider in front than behind, and placed 

 far in front of the middle of the cephalothorax . Dorsal eyes a little 

 further from one another than fi'om t^?e margin of the ceplnlothorax . 

 First row of eyes curved, close together; small mf^dian eyes half way 

 between the anterior lateral and the dorsal eyes. 



Falces short and not diverging. 



Maxillae dilated and rounded in front. 



Labium rounded in front and half as long as the maxilla. 



Sternum twice a% long as wide, contracted more in front than behind. 



Abdomen long and contracted. 



Legs spioed 4, 3, 1, 3. First pair not^shorter than the others. Patella and 

 tibia of the third as long as the patella and tibia of the fourth; meta- _ 

 tarsus and tarsus of the fourth not shorter than the patella and tibia. 



MARGAROMMA Keyserling. 1882. 

 Margaromma Keyserling, Arachniden Australiens, pp. 1347, 1466. 



Cephalothorax one fifth part longer than wide, C' ntracted in front, behind 

 wide and rounded, high above, wider at the dorsal eyes. 



Clypeus h^iXi the diameter of thejarge eyes. 



Quadrangle of eyes wider than long, forming a trapezium, contracted 

 behind. Dorsal eyes almost as far from each other as from the 

 margin of the cephalothorax. First row of eyes recurved and near 

 to each other. Small median eyes further from the anterior lateral 

 than from the dorsal eyes. 



Falces short and not diverging. 



Maxillae rather long in front, dilat-d and rounded. 



Labium contracted in front, not more than half the length of the maxilla. 



Sternum sligtly convex, a little longer than wide. 



