J. H. Enierton — Spiders of the Family ThoniisidcB. 379 



Thanatus c. Koch. 

 Cephalothorax as wide as long in males and almost as wide in 

 females, resembling that of Micrornmata and Dolomedes. The 

 front row of eyes is much shorter than the upper row and both I'ows 

 are curved. PI. xxxii, fig. 6. The abdomen is oval and little 

 flattened, but not as long and slender as in Tibellus. The fourth 

 legs are as long as the second or longer, which is unusual in this 

 family. 



Thanatus lycosoides, new sp. 



Plate XXXIT, figures 6-6c. 



This species is very near 7'. coloradensis Keys., and may be the 

 same. It is smaller than the spiders described by Keyserling in 

 both sexes, but the proportions are the same, and the male palpi 

 almost like those of coloradensis, being a little more slender and 

 having a sharper tibial process. Keyserling's specimens were all 

 from Colorado and I have not seen any of them. 



The female is 6 to 8'"™ long, Cephalothorax of largest specimen, 

 4""" long and nearly as wide. Length of legs, 4, 2, 1, 3. The legs 

 are slender and tapering, the fourth pair as long as the second or 

 longer. The colors are white and brown covered with brown and 

 gray scales and scattered brown hairs, and the whole appearance is 

 much like Lycosa or Dolomedes. The middle of the cephalothorax 

 is light from the eyes backward, and on each side is a dark brown 

 band. The abdomen has a distinct brown spot extending from the 

 front end beyond the middle, and pointed at both ends. This spot 

 is found in several species of the genus. The legs are indistinctly 

 marked on the femur and tibia with longitudinal brown lines. 

 PI. xxxn, fig. 6. The epigynum is close to the transverse fold and 

 is divided by a flat ridge, widest in front. The openings are long 

 and narrow and covered by a convex brown shell, each side opening 

 widest toward the transverse fold. Fig. 6c. 



The male is, as usual, smaller and longer legged and resembles 

 more Ocyale and Philodromus. The male palpus is somewhat like 

 that of duttonii, but shorter and stouter, and it has a longer and 

 larger tibial hook. The palpal organ is large and extends beyond 

 the tarsus on the outer side. The tube is short and slender and a 

 little curved. Over the tube is a small, flat, soft appendage. Figs. 

 6a, Qb. 



Wenham, Annisquam, Dedham, Mass.; and Mt. Carmel, Hamden, 

 Conn. 

 Tran^. CoJiN. Acad., Vql. VIII. 50 June, 1892. 



