140 BEITISH ORTHOPTEKA. 



Faun. svec. 620. Gryllus cauda biseta, alis inferi- 

 oribus acuminatis longioribus, pedibus simplicibus. 

 Habitat hodie in Europse muris domesticis. 



(C. Linnaeus, ' Syst. Nat.' ed. x : t. i, p. 428, 1758.) 

 867. GRYLLUS domesticua thorace rotundato, alis caudatis elytro 



longioribus, pedibus simplicibus, corpore glabro. 

 Gryllus cauda biseta, alis inferioribus acuminatis longioribus, 



pedibus simplicibus. Fn. 620. 

 Suecis Syrsa. 



Hospitatur apud nos in Doniibus. ubi in argillaceis muris 

 cuniculos forma/t, et stridule cantillat, preesertim per noctes, 

 inhabitatoribus ingratus ; pellitur Nymphsese radice et Populi 

 tremulse ligno. It. oel. 84. 



(C. Linnaeus, k Faun. Suec.' p. 236. 1761.) 



MALE IMAGO (PI. XII, fig. 3). --General colour 

 yellowish-grey, of a redder tint anteriorly. Length 

 up to 18 or 19 mm. Head reddish-brown with three 

 dark bands a curved one between the antennae, a 

 straight one between the eyes, and a third along the 

 back of the head ; ocelli in a distinct triangle. Pro- 

 notum transversely almost rectangular, marked with 

 large dark blotches. Elytra not reaching the tip of 

 the abdomen ; venation much modified ; radial nervure 

 with three branches ; a dark streak at the fold 

 between the dorsal and lateral areas. Wings fully 

 developed, longer than the abdomen, terminating in 

 rather long " tails." Hind tibiae heavily spined in two 

 rows, in addition to the apical " spurs." Gerci long, 

 slender, tapering, hairy. 



FEMALE IMAGO (PL XII, fig. 4). Size and colouring 

 much as in the male. It may be distinguished by the 

 unmodified venation of the elytra and the presence of 

 a long slender ovipositor. The cerci-like " tails ' of 

 the wings are somewhat more pronounced than in the 

 male. 



N-YMPH.- -Yellowish-grey like the imago ; but as in 

 the imago also the tint may be sometimes much darker. 

 It may possess rudimentary alar organs, or be destitute 

 of them, according to age. 



VARIATION.- -Though usually rather pale in tint, this 

 is not always the case, individuals occasionally being 

 quite dark. Sometimes the wings are abbreviated and 



