PLATE A — continued. 



the prosternum. e. Elytron, tv. Wing-attachments. 

 n. Meta-sternnm. x, x, x. Coxae. 



Fig. 6. — Abdomen of a female Jassiis. e. Saw case. 

 d. Valves of the pygofer. a. Basal plate. /. Navicular 

 plate. 



Fig. 7. — Head of a Delphacid. /. Lower part of the 

 frons. c. Clypeus ending in a lanceolate labrmn, which 

 partly overlaps the second joint of the rostral sheath. 

 The three lancets often protrude from the thickened 

 end of the last joint. 



Fig. 8. — End of the hind tibial and tarsal joints 

 of Lihurnia pelhicida, showing (at e) the remarkable 

 serrated and laminated spur, which is common to 

 the Delphacidfe. Probably this is used not only as a 

 help in leaping, but also it assists the insect in preening 

 itself, an occupation in which the Cicadae seem to take 

 much delight. The tarsus is very rough, with spurs 

 {a and h) and prehensile plates. 



Fig. 9. — Shows the same relative parts on the 

 fore leg. 



Fig. 10. — Part of the pygofer, with its anal tube or 

 colesteron (d), and the anal style or cauda (at e). 



Fig. 11. — The last abdominal ring of one of the 

 Typhlocybidae. a. Pygofer. c. Genital plate, or port- 

 penis(?), of Fieber. e. Anal process and appendages. 



Fig. 12. — Elytron of Macropsis, showing the wing- 

 cells, a. Basal cell. b. Costal cell. c. Discoidal. 

 d. Supra -marginal. e, i, s, 3. Subapical cells. 

 /, i, 2, 3, 4, 5. Apicals. g. Limbus, or appendix. All 

 these cells are comprised in the corium. This part of 

 the elytron is divided from the clavus by a straight 

 suture. The clavus, or lower part of elytron, is formed 

 of cells more or less closed, and bounded by the anal 

 and axillary nervures. 



Fig. 13. — The wing is sometimes subject to con- 

 siderable variation, but not so much as to prevent 

 the characters being used for the distinction of genera. 

 In the figure, h, I, m, n, may be named as the first, 

 second, third, and fourth apical cells; r and o, the 

 anal and axillary wing-cells ; p, the marginal mem- 

 brane, which usually fringes the wing-cells. 



