BYTHOSCOPUS ALNI. 97 



Bythoscopus ALNI, Schr. Plate XXVIII. , figs. 1 to Ic 



Cicada alni, Schrank. 



Jassvs alni, Boh. 



Pediopsis Heydenii, Kirschb. 



,, alni, Thorns., Sahib. 

 Bythoscopus alni, Scott ; Eclw. pt. i. p. 106. 



Male. Vertex and frons ochreous-yellow ; usually 

 with a dark space, and two round dots in the middle of 

 the first. Eyes reddish. Pronotum greyish, with a 

 slight upper carina, with a broad medial stripe, and 

 two irregular marks towards the upper margin, finely 

 striated. Scutellum yellow, with the peculiar mask- 

 like marking and transverse indentation which are so 

 curiously persistent throughout the Tettigidae, even to 

 the minute Typhlocybidae, the least specialized forms 

 of the group. Elytra long, and when closed making the 

 insect appear pointed behind. Membrane brownish 

 yellow, with a broad brown fascia from the costal edge 

 succeeded by a smaller spot nearer the apex. The neura- 

 tion strong and coarse. The transverse nerve of the 

 basal, and that of the lower discoidalcell much thickened. 

 Wings hyaline. Frons or face tumid, finely punctured 

 with orange-yellow. A black stripe on each side. 

 Antenna in deep fossas. Clypeus rounded. Rostrum 

 short. Legs quadra-prismatic. Outer edge with coarse 

 spines ; the inner edge finely fringed with hair. 



Female. Similarly coloured to the male, but much 

 less brightly marked. The abdomen is of a reddish 

 brown. In some examples the head and pronotum are 

 black, and abdomen olive. 



Inch. Millimetres. 



Expanse 0-47 12-00 



Length of body 0-20 5-00 



Common on the Alders. Huddersfield, Haslemere, 

 and elsewhere. 



H 



