108 SCORPIONS, PEDIPALPI AND SPIDERS COLLECTED BY DR WILLEY 



median spine and rather less than the space separating the bases of the median and 

 posterior spine on each side. Lower side of abdomen and the prominences that bear 

 the spines granular. 



Measurements in millimetres. Total length 9, width of head 3, width of abdomen, 

 including median spines 15, width at posterior base of anterior spines 8'5, length 

 along the middle line of abdomen 6, length including posterior spine 8 - 4. 



Loc. New Britain. 



This species is closely allied to A. pentagona Walck. (Ins. Apt. II., p. 168 ; see 

 also L. Koch, Die Arachniden p. 10, PI. I, fig. 6) from New Ireland but has the 

 spines considerably longer, the medians in A. pentagona, according to C. Koch's figure, 

 being much shorter than the width of the head. The spines are also much broader 

 at the base than in A. aciculata. 



Actinacantha studeri Karsch (Zeitschr. gesammt. Naturwiss. LI., p. 799, 1878), from 

 New Hanover is also related both to A. pentagona and A. aciculata. With A. pentagona 

 I am unable to compare it, being acquainted with A. studeri merely from its description. 

 It appears, however, to differ from A. aciculata in having the sternum black with a 

 median yellow band, and the legs and palpi black with only the femora, patellae and 

 part of the tibiae of the palpus and first two pairs of legs red. 



Family. Theridiidae. 



Genus. Lathrodectus, Walck. 

 Lathrodectus hasseltii, Thorell. 



Ofv. Vet. Ahad. Forhandl. xxvn, p. 369 (1870) (= scelio, Thor.). 

 Loc. New Britain and the Isle of Pines. 



Abundant in Australia from Cape York, southwards ; also recorded from New 

 Zealand. 



Family. Psechridae. 



Genus. Psechrus, Thor. 

 Ann. Mus. Genova XIII., p. 170, 1878. 



Psechrus argentatus (Doleschall). 



Tegenaria argentata, Doleschall, Nat. Tijdschr. Nederl. Indie, XHX, p. 407, 1857. 

 Psechrus argentatus, Thorell, Ann. Mus. Genova XHL, p. 171 (1878). 

 Loc. New Britain. 



This species has previously been recorded from Amboina, Ceram, and New Guinea 

 (Island of Faor and the Fly River). 



Allied species have been recorded from Ceylon (P. torvus, Cambr.) and Singapore 

 (P. singaporensis, Thor.). 



