1912] Emerfon — Four Burrowing Lycosa 35 



hood of Chicago, of which this is no doubt one. I received a speci- 

 men from C. B. Davenport, then Professor in the University of 

 Chicago, in 1904 and the last few years its habits have been 

 studied by Mr. W. II. Wright, a teacher in Chicago from whom 

 I have received specimens of both sexes. 



This spider is a Uttle smaller than missouriensis and lighter in 

 color, the whole upper surface a light yellowish gray. The ceph- 

 alothorax is lighter in the middle than at the sides but has no 

 definite middle stripe. The abdomen has a dark mark in the mid- 

 dle over the dorsal vessel, around which may be a few bright yel- 

 low scales. At the sides of the abdomen in front the black edges 

 of the ventral black spot extend far enough to be seen from above. 

 On the under side the color is more varied. The tarsus, metatar- 

 sus and tibia of leg I are black, and the tarsus, metatarsus and part 

 of the tibia of leg II are also black. The whole under side of the 

 abdomen except around the epigynum and around the spinnerets 

 is black and the spinnerets are also black at the ends. The ends 

 of the mandibles are black and the maxillaj and labium are a darker 

 gray than the rest of the body. The front of the mandibles is 

 thinly covered with orange hairs and there is a little orange on 

 the front of the head about the eyes. 



In the male (PL 4, 4, 4a) the color is the same, but the legs are 

 longer and more slender and the whole body smaller. The cephalo- 

 thorax of an adult female measures 8 mm., that of a male 7 mm. 

 Leg I of the female 18 mm., leg I of male 21 mm., a little longer 

 legged in both sexes than missouriensis. 



The burrows are like those of pikei without a turret or with only 

 a few chips attached to the lining around the mouth. They are 

 usually in clear sand and extend down 12 to 18 inches, enlarged 

 at the bottom. 



The spiders mature in August and September and the eggs are 

 laid in the following May in light blue cocoons. PI. 4, 4d. After 

 laying eggs the females become darker in color and resemble more 

 L. missouriensis. 



This species is found at the eastern end of Lake Erie, opposite 

 Buffalo, N. Y., at various places along the southern end of Lake 

 Michigan (W. H. Wright), as far as Chicago and at Havana, 111., 

 in sand dunes along the Illinois river (A. G. Vestal). 



