72 BRITISH CICADA. 



spurs occur below the anal tube, similar to those seen 

 in Lihurnid straminca. Femora each with a black stripe. 



Brachypterous female is larger, but coloured very 

 much like the male, and it strongly shows the three 

 dark lines which give the insect its specific name. 



Sometimes these insects are so dark in colour that 

 they may be described as having yellow lines on a brown 

 body, instead of vice rersd. 



I have received numerous examples of these insects 

 which were taken by sweeping in Fawley Wood, 

 Norfolk. They were captured by Mr. Edwards in the 

 month of June. Vide J. Scott's paper in Ent. Mo. 

 Mag. vol. ii. 92. 



Millimetres. Inch. 



Expanse 10-0 0-39 



Body of male 3-8 0-15 



female 4-8 0-19 



Stiroma pteridis. Boh. Plate XX., figs. 3 to 3 c. 



Dclphax pteridis, Boll. ; Stul ; Marsh. 

 Ditropis pteridis, Fieb., G. D. t. 8, fig. 18 ; Kirschb. 

 Stiroma pteridis, Scott; Fieb., C. E. pt. iv. 94 ; Edw. 

 pt. i. 94. 



Brachelytrous male. Form oval. Head, pronotum, 

 and scutellum lemon-yellow. Antennas large and 

 yellow. Eyes brown. Abdomen dark sienna-brown, 

 with the dorsal stripe and all abdominal edges yehow. 

 Elytra nearly half the length of the abdomen ; colour 

 shining bluish black. Legs yellow ; femora each with 

 a brown spot at the knee, and a dark streak. Frons 

 a long trapezium, with four yellow carinfe on a dark 

 ground ; middle keels not confluent. Clypeus short 

 and triangular. Mouth of the pygofer rhomboidal, 

 somewhat arched at the top, and angular below. 

 Anal tube whitish, with a black cauda. Interior of the 

 pygofer black, with brown leaf-like styles, which are 

 finely pilose. Tarsi black. 



