m 



MODERN SYSTEM. 



ing. Lip not advancing between the maxilke nor prominent, but as 

 long as broad. 



* Ei/cs eight. Mandibles projecting. 



Genus G. ATYPUS. Latr., Leach. Oletera. Walckcn'der. 



Ei/es on each side geminated : //); very small and quadrate, inserted 

 imder the base of the maxilla; : palpi inserted at the external base of 

 the maxillae, which are dilated at that part. 



Sp. 1. At^. Sulzcri. Black and shining : mandibles very long and 

 strong : thorax nearly quadrate ; plain behind, abruptly elevated be- 

 fore : the two middle eyes placed on an eminence : back of the ab- 

 domen coriaceous and more shining : joints of the legs shining. 



Olctere difforme. Walck. Tub. dcs Aran. 7. Atypus Sulzer. Latr., 

 Leach. 



Inhabits France and England. In the latter country it was discovered 

 by Dr. Leach near Exeter, and it has twice occurred near London. 



** Mandibles pcrperidicular. Ei/es six. 

 Genus 7. SEGESTRIA. Latreille, Walcken'der, Leach. 



■Mavillte straight, longitudinal, with the base thickened, dilated exter- 

 nally, somewhat wedge-shaped, the middle longitudinally convex : 

 Up elongate-quadrate, longer than broad, the middle longitudinally 

 convex or subcarinated : legs, the first pair longest, rest in propor- 

 tion, the second, then the fourth, the third pair being shortest : 

 eyes placed in a transverse line, the extremities somewhat recur\'ed. 



Sp. 1. Seg. senoculata. Thorax blackish-brown : abdomen oblong, gri- 

 seous, with a longitudinal band of blackish spots : legs pale brown 

 with obscure l^ands. 



Aranea senoculata. Fabr. Segestria senoculata. Walck., Latr., Leach, 



Inhabits rocks and old buildings. It is common in France, near Paris, 

 and in England it is not rare. 



Genus 8. DYSDERA. Latreille, Walckcnder, Leach. 



Maxilla: straight, longitudinal, with the base thickened and externally 

 dilated at the insertion of the palpi : the apex internally obliquely 

 ti-uncated, and thence externally acutely terminated : palpi with the 

 first joint short and nearly obsolete : lip elongate, (juadrate, gradu- 

 ally narrowing towards its point : eyes forming the figure of a horse- 

 shoe, the open part in front : legs with the first, then the fourth, 

 then the second pair longest, the third shortest : clurxs with a little 

 brush beneath. 



Sp. 1. Dys. erythrina. Mandibles and thorax sanguineous : legs lightly 

 coloured : al)domen soft, grayish yellow and silky. 



Aranea erythrina. Fourcroy Fa. Faris. ii. 2'lk Dysdcra erythrina. 

 Lafr.j Walck., Leach. 



