120 SCORPIONS, PEDIPALPI AND SPIDERS COLLECTED BY DR WILLEY, ETC. 



Measurements in millimetres. Total length 11*5; length of carapace 5, width 4; 

 length of basal segment of mandible 2, of palp 5, of 1st leg 14, 2nd leg 11, 3rd 

 leg 12, 4th leg ll o. 



Loc. New Britain. 



This interesting new species of which unfortunately the male only is known is 

 sufficiently characterised by the possession of the stridulating organ, consisting of a 

 series of ridges on the lower side of the mandible which are scraped against the 

 ' serrula ' on the edge of the maxilla. 



EXPLANATION OF PLATES X. AND XL 



Fig. 1. Thelyphonus leucurns, sp. n. J. Dorsal view. 



1 a. „ „ „ Under side of distal segments of tarsus of 1st leg of 



the right side. 



2. Abalius willeyi, sp. n. Dorsal view of distal segments of tarsus of 1st leg of the 



right side. 



3. Conothele arboricola, sp. n. J . Nat. size. 



3 a. „ „ ,, Trap-door nest on bark of tree. Nat. size. 



(The specimen from which the figure is drawn has no lid covering the aperture of the nest. On the 

 assumption, however, that the lid was accidentally broken away or that the nest was incomplete at the 

 time of discovery, I have ventured to have the structure represented as in fig. 3 a. Nevertheless the possi- 

 bility that Conothele habitually leaves the orifice of her nest exposed must be borne in mind. E. I. P.). 



4. Ordgarius bicolor, sp. n. J . x almost 4 times. 



4 a. „ „ „ Cluster of cocoons. 



5. Actlnacantha aciculata, sp. n. J . x 2. 



6. Fecenia angustata, Thor. Spider on lower side of rolled leaf cut away to show the 



enclosed cocoon : natural size. 



7. Oxyopes papuanus, with its cocoon in the bent stem of a mallow-like plant (1 Trium- 



. fetta). 



8. Lycosa willeyi, sp. n. Vulva. 



9. Ctenus rufisternus, sp. n. Palpus of £ from below. 



9 a. „ „ ,, Tibia and base of tarsus of palp to show tibial spur. 



10. Pandercetes plumosus, sp. n. Vulva. 



11. Thelcticopis ochracea, sp. n. Vulva. 



12. Sparassus actaeon, sp. n. Vulva. 



13. Tarodes lineatus, gen. et sp. n. J . 



14. Linus alticeps, sp. n. J. Lateral view. 



15. Bathipjms proboscideus, sp. n. Dorsal view. 



16. Plexippus stridulator, sp. n. Dorsal view. 



16 a. ,, ,, „ Maxillae and labium from below. 



16 b. „ „ ,, Inner surface of left maxilla showing the serrula 



(a) extending along its distal margin and an 

 enlargement of the teeth of the serrula (b). 



16 c. „ „ ,, Lower side of right mandible showing the series of 



stridulatory ridges (a). 



17. Encyocrypta pictipes, sp. n. J • x 3. 



