452 



ME. H. E. HOGG ON SPIDEES 



at that there should be local variations. The colouring varies considerably, but the 

 markings on the cephalothorax and upperside of the abdomen remain roughly the 

 same, and they are all distinguished by the yellow longitudinal stripes each side of 

 a dark median area on the underside of the abdomen, and the slightly differing scapus 

 of the epigyne in the female sometimes springing from a more or leas rounded base 

 and sometimes more or less narrowed at the anterior end. 



After examining specimens from Guam, Thorell came to the conclusion that there 

 was a specific difference between those from the locality whence Walckenaer described 

 his original E. theis and specimens from Amboina, and he therefore [loo. cit.) 

 described the latter as a new species, A. triangulifera. Among the numerous speci- 

 mens now before me, certainly all the same, and all from more or less the same 

 locality, the thickness of the base and breadth of the point certainly vary ; normally 

 they have a fairly rounded thickened base. Tapering to about half its width at the 

 point, the scape is hoUov^'ed underneath in the basal half and on the upperside in the 

 anterior half, in each case with a raised marginal rim ; in some specimens it is straight, 

 in others curved upwards or downwards. 



Mr. E. I. Pocock (Sond. aus dem Abh. der Senck. naturf. Ges., Bd. xxiii. Heft 4, 

 1897, p. 601) describes both species from the Island of Halmahera. 



In my specimens the legs are longer in proportion to the cephalothorax than the 

 measurements given by Dr. L. Koch (Arach. Aust. vol. i. 1871, p. 85, E. mangareva), 

 but they agree with Dr. Thorell's E. triangulifera (loc. cit.), and I consider them as 

 certainly the same as this and a variety of A. theis Walck. 



In all Dr. Thorell's descriptions he makes the rear median eyes larger than the 

 front median, while Dr. Koch says that they are the same size. In these the front 

 eyes are quite clearly larger than the rear, but not much. 



The measurements (in millimetres) of a female and a male are as follows ; — 



Female. 



Male. 



Long 



Cephalothorax 4 



Abdomen 8 



Mandibles H 



Broad, 

 f 2 in front. 



5i 



Long. 



Cephalothorax 4 



Abdomen 4^ 



Mandibles H 



Broad, 

 f 2 in front. 



1 4 



Legs. 



Coxa. 

 1 

 1 



3 

 4 



] 



Palpi 



Female. 

 Trochanter 

 & femur. 



6 

 5 

 3 

 6 



Patella 

 & tibia. 



5 

 3 

 6 



1^ 



Metatarsus 

 & tarsus. 



6i 



3 

 6 

 U 



19i 



91 

 19 



