1912] Emerton — Four Burrowing Lycosa 29 



ond winter and lay eggs in May or June. The burrows are not 

 closed during the winter except as the weather accidentally flat- 

 tens the lining around their mouths and makes the opening smaller. 

 The spiders remain torpid at the bottom, unhurt by the freezing 

 of the soil around them 



Lycosa pikei Marx. 



PI. 4, Figs. 1, la, lb, Ic. 



Lycosa arenicola, Scudder, Psychk, Vol. II, 1877. 



Lycosa pikei, Marx, American Naturalist, 1881. 



Lycosa nidijex, Emerton, N. E. Lycosidae, Trans. Conn. Acad., 1885. 



Lycosa pikei, Emerton, Supplement to N. E. Spiders, Trans. Conn. Acad., 1909. 



The name arenicola was preoccupied by O. P. Cambridge in the 

 "Spiders of Dorset," 1875. In Trans. Conn. Acad., 1885, I have 

 confounded this species with L. nidifex and the description given 

 there applies in part to both species. This mistake has been con- 

 tinued by T. H. Montgomery in Proc. Acad. Nat. Sci., Philadel- 

 phia, 1904, and by R. V. Chamberlin in Proc. Acad. Nat. Sci., 

 Philadelphia, 1908. The differences between this species and nid- 

 ifex are described in my supplement to N. E. Spiders, Trans. Conn. 

 Acad., 1909. Lycosa arenicola McCook refers to this species in 

 his accounts of habits on the Massachusetts coast, but he also 

 applies the name arenicola to "the turret spider," and so proba- 

 l)ly includes nidifex and perhaps other species. 



Lycosa pikei is distinguished from nidifex by its color, which is 

 darker toward the front, and the distinct middle stripe on the abdo- 

 men. The legs are also slightly shorter. These differences are 

 more distinct in the males and less so in old females and young. 

 The cephalothorax in females is dark gray with a lighter middle 

 stripe. The first and second legs are colored like the cephalo- 

 thorax with the first pair a little the darker. The third and fourth 

 legs are lighter gray more like the light stripe of the cephalotho- 

 rax. The abdomen is light gray with a slightly darker middle 

 band extending its whole length, the front end following the out- 

 line of the dorsal vessel and the hinder half a little wider with the 

 sides notched. On the under side the legs I and II are black their 

 whole length, and the sternum is black, at least at the front end. 

 The abdomen is pale with usually, but not always, a gray stripe 

 in the middle for the whole or part of its length. The sides of 



