BEV. O. P. CAMBEIDGE ON CEYLON SPIDERS. 373 



Part I. of Catalogue of a Collection of Ceylon Araneidea lately 

 received from Mr. J. Nietner, with Descriptions of new Species 

 and Characters of a new Genus. By the Eev. O. P. Cam- 

 bridge. Communicated by James Salter, Esq., F.E.S., F.L.S. 



(Plates XI., XII., & XIII.) 

 [Read Feb. 4, 1869.] 



The present paper includes about one-third of the collection, 

 of which, as far as I am able to ascertain, the greater number are 

 undescribed. Some rough sketches, chiefly of structure, details, 

 and specific differences, are added. These sketches make no pre- 

 tension to anything finished or artistic ; but it is hoped that they 

 may assist arachnologists in determining the species described. 



List of species included in Part I. : — 



Mygale radialis, n. sp. Theridion annulipes, n. ep. 



Cheiracanthium incertum, n. sp. spiniventris, n. ep. 



Tcgenaria civilis (Sund.). albomaculosum, n. sp. 



torva, n. sp. Dolichognatha Nietneri, n. gen. ct sp. 



Pholcua Ceylonicus. n. sp. Tetragnatha decorata {BL). 



distinctus, n, sp. culta, n. sp. 



Argyrodes fissifrons, n. sp. argentula, n. sp. 



Theridion tepidariorum (C. Koch). Ceylonica, n. sp, 



lutipes (Comb.) 



Fam. MYGALIDES. 

 Genus Mygale. 



Mygale radialis, n. sp. PI. XI. figs. 1 to 8. 

 ^ ad. Length 4 lines. 



Cephalothorax broad, flattened, oval, rather broader in front than be- 

 hind, slightly truncate at each extremity, and furnished sparingly 

 with hairs and fine bristles ; at the junction of caput and thorax is a 

 deep, curved, transverse indentation ; the curve directed forwards ; 

 the other normal grooves and indentations are well marked. The 

 colour of the cephalothorax is a dark yellow-brown suffused with 

 blackish at the eyes ; blackish lines and markings follow the conver- 

 ging grooves of the thoracic region, and there is a largish somewhat 

 triangular black patch behind each lateral eye of the hinder row, and 

 a black line, interrupted at the thoracic junction, bisects the cephalo- 

 thorax longitudinally. 



Eyes eight, near the fore margin of upper part of caput, in two transverse 

 lines or rows, near together and almost straight ; the two central eyes 

 of the front row are on a slight gibbosity, and nearer together than 

 each is to the lateral eye on its side ; these laterals are the largest, 



