PHASMID.E IN THE BRITISH MUSEUM. 469 



Vasilissa Walkeki, s}). n. 



Male. Pale ochreous, perhaps green during life, especially the tegmina ; antennae 24- 

 jointed, scape oblong, about twice as long as broad, the second joint annular, tlie fourth 

 scarcely longer than broad, the third, fifth, and sixth about twice as long as broad, but 

 increasing in length slightly and progressively; the following joints linear, first increasing 

 and then decreasing in length, the sixth terminal ones much shorter, and therefore 

 comparatively thicker .than the others ; terminal joint pointed. Head and prothorax of 

 about equal length ; mesothorax nearly four times as long as the prothorax ; four hind 

 femora with three rows of short black spines below, and an incomplete row of from 2 

 to placed widely apart on the basal half of the middle line above ; four hinder tibiae set 

 with short hair, and furnished Avith one row of short black spines beneath. Tegmina 

 and costal area of wings probably green in life. Wings rather short, subhyaline, with 

 two round brown spots on each of the cross-nervures. 



Female (described from an immature specimen in which the wings are not developed) 

 similar, bvit much stouter ; the spines on the legs are less numerous, especially on the 

 upper surface of the femora, where they are reduced to two. The antennae are much 

 shorter than in the male, the longest joint being the 11th, and the length of the others 

 rapidly decreasing towards the base and tip. In the female the hinder lobe of the 

 median segment is pointed, and almost as long as the segment itself ; in the male it is 

 rather more than half as long, and sends off a ridge which extends to the front of the 

 median segment. 



Sab. Queen's Islet, N.W. Austraha. 

 .Collected by Mr. J. J. Walker, R.N. 



Dimensions. 



6. ?. 



miUim. millim. 



Long, corporis 85 135 



„ capitis 4 7 



Lat. „ 3 4 



Long, antennarum 27 19 



„ pronoti 3 5 



„ mesonoti 14 25 



,, metanoti, cum segmento mediauo . . 12 16 



,, segment! mediani 7 9 



„ femorum anticorum 25 32 



„ medianorum 18 21 



,, posticonim 



00 22 



„ tibiarum anticarum 25 36 



„ „ medianarum 15 20 



„ operculi . — 13 



