180 REVISION OF THE GENUS PAROPSIS, 



The transverse wheal-like ridge crossing the elytra somewhat 

 in front of the middle is a character at once separating this species 

 from all but a small number of its congeners. Several of the 

 species described by the Rev. H. Clark from W. Australia seem 

 from their descriptions to present this character; but although I 

 doubt whether I have seen any of them they are evidently distinct 

 from the present one, being of different size or colouration. In 

 the present insect there are several short transverse ridges behind 

 the long one, and the verrucfe and ridges are all quite concolorous 

 with the derm. The dark markings on the elytra are not at all 

 sharply defined, and consist (in the examples before me) of a 

 blotch on each elytron near the scutellum, another on the humeral 

 callus and an obscure vitta near the apex on the external margin 

 of the disc. There is little noticeable difference between the 

 sexes. It is perhaps just possible that this insect is P. nervosa, 

 Clk., but as that species is described as having a large quadrate 

 black spot on the prothorax on either side, of which there is no 

 trace in the examples before me, identity seems very improbable. 



W. Australia; Geraldton; sent by Mr. Lea. 



GROUP IV. 



This is a small group that Dr. Chapuis included in his Group 

 iv. (which otherwise is equivalent to my Group iii.) as consisting 

 of aberrant forms. But as that learned author constituted it, a 

 good half of its species are much more genuinely to be considered 

 as aberrant forms of his Group iii. (my Group v.). I am veiy 

 much dissatisfied with the existence of this group, but nevertheless 

 its recognition seems to be essential to the classification of the 

 groups on characters of sculpture, which (as I have already 

 remarked) seems to me to be the only workable classification. 

 It will be remembered that {vide P.L.S.N.S.AV. 1896, p. 638) the 

 present aggregate differs from Group i. b}^ its prothorax neither 

 bisinuate on the sides nor mucronate in front, from Group ii. by 

 its elytral sculpture being linear in arrangement, from Group iii. 

 by its elytra not being verrucose, and from Group v. by the series 

 of punctures on its elytra not being 10 in number. The first six 



