J. H. Emerton — Neio England Lycosidm. 501 



Dolomedes SexpunctatUS Hentz, Boston Journal of Nat. Hist., vol. iv. 

 Plate XLIX, figures 8, 8fl. 



Female, IS""" long. Cephalothorax, 5-5™'" long, 5"'™ wide. Thecepha- 

 lothorax is not as wide in jJi'oportion to its length as in the other 

 species. The color is dark olive or gray and yellow. The cepha- 

 lothorax is dark yellowish brown with a very bright white line on 

 each side extending forward to the front of the mandibles. The 

 abdomen is dark gray, darkest in the middle, with, two rows of small 

 white spots. The legs and palpi are greenish yellow with dark 

 spines. The under side is lighter yellow. On the sternum are 

 six black spots, sometimes very distinct, in other individuals hardly 

 visible. 



This species lives near water, on which it runs easily. Eastern 

 Massachusetts ; Albany, N. Y. ; New Haven, Conn. Though it is 

 common, I have only found one adult female and no males. 



Dolomedes tenebrosus Hentz. 



Plate XLIX, figures 9, 9a, 96, 9c. 



Length of female, 18™'^; 1st leg, 33'"'"; 4th leg, 37'"'"; cephalo- 

 thorax, 9""" long, S*""' wide. 



Male, 16'"'" long ; cephalothorax, 9™"' long, 8'"'" wide ; 1st leg, 44""" ; 

 4th leg, 48'"'". 



This is one of our largest spiders, some males spreading four 

 inches. The colors are dark brown and light gray, turning darker 

 and yellower in alcohol. The cephalothorax has a light stripe on 

 each side. The abdomen is marked with five or six dark brown 

 angular stripes across the hinder half. These are darkest around the 

 edges and bordered by lighter lines. The legs are marked with dark 

 and light rings, which are plainer in the male than female. The 

 markings on the abdomen are also somewhat different in the male, 

 being more united into a middle band bordered by lateral bright 

 white or yellow ones. The femora of the fourth pair have near the 

 end on the under side an oblique cluster of black spines on a slight 

 elevation. The male palpi have the tibia widened at the end, and a 

 large pi'ocess on the outer side near the middle, consisting of a large 

 hook with a smaller one at its base and above it. The tarsus is 

 large and the palpal organ complicated with a long slender tube. 



These spiders live on bushes near water. The female makes a 

 large mass of web in which she places the cocoon of eggs, and in 

 which the young live for some time after hatching. 



Massachusetts. New Haven, Conn. 



