LIBURNIA DENTICAUDA. 51 



umber brown ; segments of the abdomen ochreous ; 

 hind coxae rufous. 



The elytra of individuals differ much in length. Mr. 

 Edwards says those of the Macropterous form are twice 

 as long as the abdomen. 



The genitalia may be compared with those of L. 

 discreta, L. dijficilis, and L. peUucida, As Mr. Edwards 

 says, " A trifling alteration in the point of view will 

 give rise to a considerable difference in the appearance 

 of these parts." The insect therefore should be so 

 placed as to bring into view the bases of the styles 

 seen from behind. 



Size, from2-50 to 3-75 millimetres, or 0-09to0'12inch. 



Taken at Buxton, Wimbledon, Haslemere. June. 



LiBURNiA DENTICAUDA, Boli. Plate XV., figs. 1, 2 & 15. 



Delphax denticauda, Boh.; Flor ; Fieb., G. D. t. 8, 



fig. 46. 

 Liburnia denticauda, Scott; Sahl. ; Fieb., C. E. pt. iv, 



49 ; Edw. pt. i. p. 81. 



Colour pale yellowish. Frons yellow, with indistinct 

 white carinae. Abdomen black in the male, with the last 

 segment whitish. Pronotum shorter than the vertex ; 

 keels indistinct. Elytra wrinkled, half the length of 

 the abdomen, dirty yellow, with coarse veins and trun- 

 cated apices. The middle of the pygofer shows a long 

 sharp tooth. 



The Macropterous form occurs both as male and 

 female. The elytra of the former are one-half longer 

 than the abdomen, whilst those of the latter are only 

 two-thirds the length of the same. The elytral edges 

 of my figure are too white. 



The pygofer of the male, seen from above, is trans- 

 verse, and notched at an acute angle. Seen from the 

 side the border of the notch is oblique, and the border 

 forms, by the deep " ' echancrure ' with the sides, a 

 sharp angle, bent inwards " (Fieber). 



e2 



