Attidce of North America. 71 



tral, longitudinal, black line, while the eye region is black with some 

 short white hairs; the abdomen is mottled with black, red and white, 

 sometimes with alternate white and red chevrons on the central re- 

 gion; clypeus white; falces, moutliparts, sternum and coxae pale; 

 Tenter covered with short white hairs; legs white with black spots 

 and spines, and underneath on the fermoral joints, characteristic, 

 oblique, black bars; the second variety (niger) has the cephalothorax 

 black, with a pale spot, divided by a longitudinal, black line, in the 

 central thoracic region, and, on the posterior part of the eye region, 

 forming a ti'ansverse row, three long tufts of black hairs; abdomen, 

 black; clypeus, palpi, falces, sternum, mouthparts, venter and some- 

 times coxae very dark or black; legs pale, with a yellowish tint in, 

 comparison with the white legs of the first variety, tijDped with black. 

 Intermediate between these varieties is one which is nearly as 

 dark as niger, with pale legs, but without the cephalic tufts. So un- 

 like in general appearance are the extreme forms that they were 

 placed by C. Koch in two different genera {Plexippus undatus, Die 

 Arachniden, xiii, fig. 1183, and Maevia pencillata, Die Arachniden, 

 xiv, fig. 1325). As this is an extremely common species we have 

 compared large numbers of them, but have never found the tufts 

 present in the first variety, which most resembles the $ . $ . Cephal- 

 othorax light brown in thoracic part, black in eye region, with short 

 white and red hairs; abdomen white on sides and central dorsum, 

 ■w-ith two longitudinal bright red bands; in rubbed specimens the cen- 

 tral region and sides are pale flecked and striped with reddish, and 

 the bands are dark red; clypeus, falces, mouthparts, sternum, coxae, 

 palpi and legs pale; venter covered with short white hairs. 

 Habitat: United States. 



ASTIA (?) MOROSA Nov. Sp. 



Plate I, figure 53. Plate T, figures .53, 53a. 



(5 . Total lengih 5 mm. Width of abdomen 2.1 mm. 



Cephalothorax: length 2.4; width 1.8; height 1.3. 



Legs 5.4, 4, 5.1, 5.3; i^ateUa and tibia of the first, 2.5; patella and tibia of 

 the third, 2.2; patella and tibia of the fourth, 2.2; metatarsus and 

 tarsus of the fourth, 1.9. 



$ . Total length 6 mm. Width of abdomen 3.2 mm. 



Cephalothorax: length 2.9; width 2; height 1.7.. 



Legs 5.8, 4.9, 6.3, 6.8; patella and tibia of the first, 2.4; patella and tibia of 

 the third, 2.8; patella and tibia of the fourth, 2.6; metatarsus and tar- 

 sus of the fourth, 2.4. 



