56 Wisconsin Academij of Sciences^ Arts and Letters. 



mouthjparts and sternum black. Coxse dark brown. Venter covered 

 with hairs as above. Palpi light, covered with short wliite hairs. 

 Legs of the first pair black, excepting metatarsi and tarsi which are 

 hght brown; other legs brown, lighter toward extremities, with some 

 short white hairs. 

 Habitat: Mexico. 



ERIS NERVOSUS Nov. Sp. 



Plate I, figure 39. Plate III, figure 39. 



? . Total length 4 mm. Width of abdomen 1.5 mm. 



Cephalothorax: length 1.6; width 1.4; height .7. 



Legs 4, 3.2, 2.9, 3.7; patella and tibia of the first, 1.3: patella and tibia of the 

 third, .9; patella and tibia of the fourth, 1.3; metatarsus and tarsus 

 of the fourth, 1. 



Cephalothorax not high, nearly plane, a little dilated opposite dorsal eyes, 

 with sides nearly vertical in front, and somewhat rounded behind; ce- 

 phalic part very little inclined; thoracic part sloping from just behind 

 dorsal eyes. Ocular area occupying nearly three-fifths of cephalo- 

 thorax, one fourth wider than long, wider behind than in front. An- 

 terior eyes small, in a straight row, slightly separated from each 

 other; middle scarcely twice as large as lateral; eyes of second row 

 twice as far from dorsal as from lateral eyes; dorsal as large as lateral 

 eyes, further from each other than from lateral borders, forming a 

 row as wide as cephalothorax at that place. Clypeus one-haK as high 

 as middle eyes, a little inclined backwards. Falces extending to in- 

 ner edges of lateral eyes, a httle longer than the face, nearly square, 

 parallel, a little inclined backward, fang weak. Maxillae diverging 

 a little, enlarged and rounded at extremity. Labium one-half as long 

 as maxillae, a little longer than -wide, rovinded. Sternum nearly 

 round. Anterior coxge sef)arated by scarcely the width of the labium. 

 Legs of the first pair stoutest, with femoral ioints enlarged and com 

 pressed, and patella and tibia much stouter than metatarsus and tar- 

 sus; weak femoral spines on first, second and third; stout tibial and 

 metatarsal spines on the first, and weak spines on the corresponding 

 joints of the second. 



Coloration: Cephalothorax black. ClyjDeus black with a few long white 

 hairs. Abdomen dark reddish brown with some very short white 

 hairs, three rather indistinct, oblique black bands on each side of dor- 

 sum, and two white chevrons at apex. Falces and mouthparts dark 

 brown. Sternum and coxae light brown. Venter dark reddish brown 

 with short gray hairs. Palpi and legs light brown, the legs tipped 

 with black. 



latitat: New York. 



