AEANEAE 419 



FAMILY 3. FILISTATIDAE. 



With cribellum and calamistrum ; all the eyes close together and 

 upon an eminence; mandibles small; web like that of Dictyna: 1 

 American species. 



FILISTATA Latreille. With the characters of the family: 2 species. 



F. hibernalis Hentz. Body 12 mm. long with legs about twice as 

 long, and uniformly dark gray in color: one of the commonest house 

 spiders of the southern states. 



FAMILY 4. DYSDEBIDAE.* 



With only 6 eyes; with a pair of tracheal spiracles immediately 

 behind the lung spiracles : the animals build tube-like nests on the ground 

 under stones and other objects; 3 American genera and species. 



DYSDERA Latreille. Eyes in a ring, close together; mandibles long 

 and inclined forward: 1 species. 



D. interrita Hentz (Fig. 658). Length 12 mm.; the 

 abdomen but little larger than the cephalothorax; color 

 orange brown, lighter behind : New England. 



FAMILY 5. DRASSIDAE.* 



Elongated spiders with 2 claws and a bunch of flat- 

 tened hairs on each leg; eyes all of the same size, usually 

 in 2 rows; spinnerets widely separated: ground spiders Dysdera 

 which build tube or sac-like nests ; about 60 American species. (Emerton). 



1. DRASSUS Walckenaer. Eyes in 2 slightly curved 



rows, which diverge mid-dorsally, the posterior row longer than the 

 anterior; mandibles small; maxillae straight: 9 American species. 



D. neglectus Keyserling (D. saccatus Emerton). Length 20 mm.; 

 color light gray, without markings; abdomen but little longer than the 

 cephalothorax: the animal lives under stones and makes a large trans- 

 parent bag of silk in which the cocoon is deposited; common. 



2. GNAPHOSA Latreille. Eyes in 2 nearly straight rows, the upper 

 row longer than the lower; those of the middle pair of the upper row 

 being much nearer each other than the lateral eyes : 10 American species. 



G. gigantea Keyserling (G. conspersa Thorell). Length 12 mm.; 

 color rusty black; cephalothorax and abdomen of about the same size; 

 mandibles large, with a wide serrate tooth under the claw: under stones 

 and leaves. 



3. SERGIOLTTS Simon. Maxillae arched around the labium; the 2 

 rows of eyes nearly straight; no dorsal groove: 3 American species. 



* See "New England Spiders of the Families Drassidae, Agelenidae, and Dysderi- 

 dae," by J. H, Emerton, Trans. Conn. Acad., Vol. 8, p. 1, 1890. 



