LIBURNIA LUGUBRINA. 45 



This insect has been as yet only described in the 

 undeveloped form. 



Male. Vertex dirty ochreous-yellow ; the rest of 

 the upper side black, except the posterior margin of 

 the elytra, which is white. Elytra half the length of 

 the abdomen ; the lower border rounded. Pygofer 

 black and notched, the base being concealed beneath 

 the preceding somatic ring. 



Female with the vertex yellowish and square, not 

 protuberant. Pronotum and scutellum with faint 

 yellow carinaB. Abdomen dark brown. Elytra like 

 those of the male. Legs and the antennae dirty 

 ochreous-yellow. Frons black. 



Fieber figures the genitalia of L. leptosoma and L. 

 albo-fimbriata ; but a comparison of his drawings does 

 not show, from this cause alone, a sufticient reason for 

 specifically separating these two insects. Mr. Edwards 

 marks this delphacid as common in Britain. It also 

 occurs in France, Germany, and Switzerland. 



Size, 0-08 to O'lO inch, or 2-08 to 2-75 millimetres. 



LiBURNiA LUGUBRINA, Boh. Plate XIV., figs. 1, 2. 



Delphax lugubrina, Boh.; Flor; Kirschb.; Fieb., G. D. 



t. 8, fig. 39. 

 Libumia lugubrina, Scott ; Fieb., C.E. pt. iv. 43, 38; 



Edw. pt. i. 76. 



Brachypterous female large, fusiform; general colour 

 ochreous yellow, slightly varied by pale brown markings 

 down the pronotum and the scutellum. Eyes dark 

 brown. Tips of the tibiae black. Pronotum and the 

 scutellum, taken together, one and a half times greater 

 in length than the head. Edges of the elytra and the 

 body-rings paler. Tibial laminated spur large. 



Male macropterous form with scutellum nearly three 

 times the length of the abdomen. Nervures non- 

 granulate. Pygophore transversely quadrangular when 

 viewed from behind ; sinuous and notched at the base. 



