432 AEACHNIDA 



1. PISAURINA Simon. Anterior row with 4 eyes of same size and 

 straight ; area of the middle eyes longer than broad : 3 American species. 



P. undata (Walckenaer). Length 13 mm.; color light brownish- 

 yellow, with a wide, median, dark band edged with white running 

 the length of the body; abdomen long and narrower than the cephalo- 

 thorax : common in bushes ; no web is made 

 until the young are ready to hatch, when 

 the female builds a small web about the 

 cocoon in which the young may live. 



2. DOLOMEDES Latreille. Area of the 

 middle eyes as broad or broader than long; anterior 

 row of eyes curved forward : 7 American species. 



D. fontanus Emerton (D. tenebrosus Em.) (Fig. 

 681). Length 20 mm., with legs spreading 10 cm.; 

 color gray; cephalothorax larger than the abdomen 

 and with light bands on the side ; abdomen with dark 

 cross lines: common on the ground in low 

 bushes near water with habits like P. 

 undata. 



D. sexpunctatus Hentz. Length 15 

 mm.; color dark greenish-gray, with a whitish line 

 on each side of the length of the body; abdomen 

 larger than the cephalothorax; sternum with 6 dark 



spots : common under stones near the water on which 'Fig. 681 



Dolomedes fontanus 

 it runs readily. (Emerton). 



FAMILY 14. LYCOSIDAE.* 



Wolf spiders. Large, active spiders which live on or near the 

 ground; eyes usually in 3 rows; in the front row are 4 small eyes and 

 back of these 2 pairs of large eyes; cephalothorax high and prismatic; 

 feet with 3 claws, the small one surrounded by hairs : no web built, but 

 many species line their retreats with silk; the cocoon is attached to the 

 spinnerets and the young spiders are earned for a short time on the 

 mother's back; about 114 American species. 



Key to the genera of Lycosidae here described: 



Oj Labium longer than broad. 

 5i Posterior spinnerets not longer than the anterior or but slightly so. 



<?! Cephalothorax highest in the cephalic region 1. LYCOSA 



c a Cephalothorax highest in the middle 2. TROCHOSA 



6 2 Posterior spinnerets half again as long as the anterior 4. PIRATA 



o 2 Labium at least as broad as long 3. PARDOSA 



* See "New England Lycosidae," by J. II. Emerton, Trans. Conn. Acad., Vol. 6, p. 

 481, 1885. "Canadian Spiders," by same, ibid., Vol. 9, 1895. "Descriptions of North 

 American Araneae of the Families Lycosidae and Pisauridae," by T. H. Montgomery, 

 Proc. Acad. Nat. Sci., Phila., 1904, p. 261. 



