80 REVISION OF SYMPETES AND HELiEUS, ETC., 



Pasc. = iS'. tricostellus White. The variability, especially sexual, 

 in the form of the latter would easily cover Mr. Galian's remarks 

 on that point, while my measurements of specimens identified as 

 S. Macleayi Pasc, are quite in accord with those of <S'. tricostellus 

 White, in the British Museum. The remark as to aS'. rotundatus 

 being possibly only a small .S. tricostellus is especially strong 

 evidence, since I have had some difficulty in separating S. 

 rotundatus from S. Macleayi except by size. *S'. tricostellus White, 

 was described from King George's Sound, not from Swan River as 

 de Breme states of his species. Macleay has pointed out Pascoe's 

 omission of the carinated prothorax in his species. There is 

 considerable variation also in form, size, and convexity. Six 

 specimens under observation vary from 23 x lS-5 to 27 x 21 mm. 

 As in the other species of this group of Sympetes (B of table, 

 infra), the male is smaller than the female, with thediscal portion 

 more convex, subapical margins narrower than on basal half. 

 The apical spines on tibia) are shorter in the male. My speci- 

 mens are from Albany and Kellerberrin. 



*S'. Bremei Hope = -b'. Duboulaii Pasc. — This synonymy has 

 already been suggested by Lea and Ijy mj'self. Mr. Gahan has 

 corroborated this by a comparison of the types, and writes — 

 " The type of the latter is a small black specimen, but shows no 

 structural difference." My own specimens vary in colour from 

 light brown to black, and this may be explained by immaturity. 

 I am inclined to think that this species, like other sand-dwellers 

 (e.g., Scymena variabilis Pasc.) may be of either colour when 

 mature. 



.S'. undulatus Lea = aS'. testudineus Hope. — Having seen the 

 types of both at different times, T have only my memory to add 

 to the evidence of their descriptions. Mr. Lea's note (These 

 Proc. 1897, p. 586) as to the absence of the anterior tibial spur is 

 scarcely sufficient to constitute a distinction. The geographical 

 difference may be noted. S. undulatus is from Geraldton, S. 

 testudineus is from Port Essington. Mr. Gahan writes — " aS'. 

 undulatus Lea, is, Ithink, aS'. testudineus Hope, after comparing his 

 description witli the type of the latter." My own measurements 



