384 PERCY SLADEN TRUST EXPEDITION 



$. Carapace : about equal in length to the patella and tibia of the second leg and 

 to the metatarsus of the fourth, and shorter than the patella and tibia of the first or 

 fourth. 



Palp. Spine of palpal organ long and fine, but shorter than in C olivaceum ; its 

 point blunt and very slightly enlarged (Fig. 1). 



Legs. Tibial spurs of first leg resembling those of C. olivaceum very much in general 

 appearance, but the outer spur is more strongly curved, and the spines of the longitudinal 

 series are only nine in number. Inner spur stouter than that of C olivaceum. Metatarsus 

 of first leg straight. 



Measurements in mm. Length of carapace 11, of patella and tibia of first leg 13, of 

 patella and tibia of fourth 13, of metatarsus of fourth 11 '5. 



?. Carapace : usually about equal in length to the patella and tibia of the first leg 

 and a little shorter than the patella and tibia of the fourth. 



Measurements in mm. Length of carapace 10"25, of patella and tibia of first leg 10 - 5, 

 of patella and tibia of fourth 11 '25, of metatarsus of fourth 9. 



Material. A single male (the type) and several females from Silhouette. Females 

 and immature examples from Mahd, Praslin and Felicity. 



Remarks. The genus Chatopelma is known to occur in Egypt, Syria, Central Arabia, 

 and German East Africa (Bagamoyo). 



18. Tetragnatha nigrigularis, Sim. 



Tetragnatha nigrigularis, Sim., Ann. Soc. Ent. France, lxvi. p. 377 (1897). 



Material. Numerous examples from Mahd, Silhouette, Praslin, and Felicite. 



Remarks. A minute anterior tooth is present below on the chelicera in the female of 

 this species ; and there are 9 — 12 inner teeth, besides the large tooth. T. nigrigularis is 

 closely allied to the species from Fiji, Tonga, and Samoa, which was referred with doubt 

 by Keyserling and Koch to T. mandibulata, Walck., and to which the name T. keyserlingii 

 was subsequently given by Simon*. 



20. Tetragnatha mandibulata, Walck. 



Tetragnatha mandibulata, Walck., Ins. Apt. ii. p. 211 (1841): T. minax, Blackw., 

 Proc. R. Irish Acad. Ser. 2, iii. (1877) p. 20, pi. 2, fig. 14 : T. minax, Sim., Bull. Soc. Zool. 

 France, xviii. (1893) p. 206. 



Material. Several specimens from Coetivy and Praslin. 



Remarks. This species has already been recorded from Burma to the Sandwich 

 islands. A number of female specimens from Mauritius (Keyserling Coll.) are preserved 

 in the British Museum. They were identified as T. protensa by Keyserling t. Judging 

 from the figure that he gives, the male belongs to some other species ; unfortunately the 



* Ann. Soc. Ent. France, Ser. 6, x. (1890) p. 134. The references to the descriptions by Keyserling and 

 Koch are given by Simon in this paper. 



t Verh. z.-b. Wien. xv. p. 847, pi. 21. 



