Spiders of the Sub Family Lyssomance. 335- 



LYSSOMANES NIGROPICTUS N. Sp. 



Plate XI, figure 10. 

 $ . Length of ceplialothorax 2.8 mm; of abdomen 4 mm. 

 Legsl2.5,11.5, 11.3, 10.8. 



Cephalic part as long as thoracic. Quadrangle of eyes scarcely wider than 

 long. Eyes of first row twice as large as those of second row. First 

 and second rows equally wide. Clypeus nearly one-half as high as 

 anterior eyes. Falces weak, parallel, vertical, as long as face; fang 

 weak. Maxillae rounded and slightly enlarged at their extremities, 

 excavated on their inner sides for labium. Labium longer than 

 wide, about one-half as long as maxillae, blunt at tip, widest in the- 

 middle, and narrowing toward both ends. Coxae separated by but 

 Mttle more than width of labium. Legs 1, 2, 3, 4. Femur of the first 

 scarcely longer than femur of the second. Palpus with patella and 

 tibia three-fourths as long as tarsus. Spines on palpus as foUows: 

 femur, two on dorsum at distal end; patella, one long spine at ex- 

 ti-emity; tibia, one behind middle on inner side, and one at distal 

 end; tarsus, two long spines on dorsum of enlarged part, placed side 

 by side. 

 Coloration (under alcohol): Upper surface of cephalothorax with eye- 

 region white, and the remainder very hght brown; there is a black 

 line around the lower margin and a central dark brown band from 

 the fourth row of eyes to the posterior edge. Upper surface of ab- 

 domen white with four pairs of brown spots; the first pair is on the 

 anterior face of the abdomen and is not plainly visible from above; 

 the tliird pair is just behind the middle point of the dorsum; the 

 fourth pair is just in front of the white spinnerets, and the two spots 

 are connected by a brown band. Legs white with brown rings and 

 spines and black tij^s. Palpus wliite with a dark line on each side of 

 the femur, and having the bulb light brown, and some dark hairs at 

 the extremity of the tarsus. Other parts all white. 

 Habitat: South America (Ajnazon). 

 From the collection of M. Simon: 



The tarsus of the palpus of this species has an arrangement of the spines 

 which is only duplicated in Jelskia velox, the palpus ditfering fi-om that of 

 this species in having no fringes of hair on the patella and tibia. It has, 

 moreover, the first two pairs of legs more nearly equal in length than any 

 species excepting Jelskia robusta, from which it is quickly distinguished 

 by its much lighter color. 



