50 ON FALKLAND ISLAND SPIDERS. 



The femoral joint is thickly covered with long chitinous 

 spinous processes, which in the male are twice as long as in the 

 female. The patellar joint is enlarged and globular, the other 

 joints are without spines but thickly covered with hair. 



The measurements (in millimetres) are as follows : — 



Long. Broad. 



Cephalic 1 . £ . o o 



& Sternal | P^^^^t of scutum .. . 2 .3 



Abdominal do. do.... 5 5 



Mandibles 2 



Coxal 



part. Tr. & fem. 



Legs 1. I 3 



2. 1 31 



3. 1 31 



4. 3 4 

 Palpi 1| 



This differs from aS'. vitellinosulcatus Sor. (believed to have 

 come from S. America and described from a single female) in 

 having a single terminal process above the anal tubercle at the 

 posterior end of the abdomen, instead of a pair of quite small 

 ones ; in having the anterior edge of the scutum straight instead 

 of two pointed processes in the middle ; in having no spine on 

 the femoral joint of the palpi and no pattern on the back of the 

 abdomen, as well as in its smaller size. There is no process on the 

 eye-tubercle. 



One male, 6 females and 2 non-adult, found among decaying 

 roots of ferns. 



EXPLANATION OP THE PLATES. 



Plate I. 



Fig. 1. Petricus signatus, sp. n., X 3. a. Eyes. b. Lip and maxilla, c. Epigjnie. 



2. ISmmenommafalMandica, sp. n., X 3. a. E3'es. h. Epigyne. 



3. Araneus vallentini, %^.w.,\\?ii.&Ym. a. Underside of abdomen, h. Profile. 



c. Front of cephalothorax and eyes. d. Lip and maxillae, e. Epigyne. 



4. Araneus cjlobiger, sp. n., nat. size., $ . a. Eyes. h. Male palp from side. 



c. Male palp from underneatli. d. Tibia II, e. Coxa I. 



Plate II. 



Fig. 5. Philisca cohdata, sp. n., X 2. a. Eyes. h. Mandible, c. Epig3'ne. 



d. Spinnerets. 



6. a. Eyes of Tetragnatha insulata, sp. n. h. Underside of mandible, ^. 



c. Pore-end of mandible from above, d. Male palp. e. Epigyne. 



7. Sadocus vallentini, sp. n., X 2. a. Underside of carapace, b. Mouth parts. 



c. Mandible and palp. 



