PLATE XII. 



LiBURNiA LEPiDA. (Page 37.) 



Fig. 1. — Macropterous form, with its milk-white 

 spotted elytra, and the frontal keels prolonged tc the 

 posterior edge of the scutellnm. The legs are ringed. 



Fig. 2. — Female of the relative size. 



Fig. 3. — Brachelytrous male, with its truncated 

 pygofer. These forms are not pupal for the degraded 

 elytra are free. 



Fig. 4. — Head and pronotum of fig. 1. 



LiBURNiA GUTTULA. (Page 38.) 



Fig. 6. — Macropterous male, with its enlarged 

 l^ygofer and anal processes. Some examples show the 

 dark streak carried to the base of the elytron. 



Fig. 6. — Elytron of the same, the membrane of 

 which is almost transparent. 



Fig. 7. — Anal style, with two filiform adjuncts pro- 

 truding from the tubular process. 



Fig. 8. — The entire pygofer of the male, viewed from 

 above. This complex organ shows two lateral plates, 

 two pincer-like styles, and the curved penis, with 

 its bristles emerging from the spatulose sheath, (pygo- 

 theque). 



LiBURNiA ADELA. (Page 39.) 



Fig. 9. — Macropterous male, with its punctate elytra. 



Fig. 10. — Frons of the same, showing the middle 

 keel forked just below the vertex. 



Fig. 11. — Elytron, showing the strengthened apical 

 border and the punctate nervures. Compare L. capuodcs, 

 Plate XIII. 



