190 BRITISH ORTHOPTERA. 



trouvee ;\ Utrecht sur 1'Orme, mais je ne'ai pas encore vue en Suede. 

 Elle est entierement d'un verd celadon, sans taclies. Les antennes, qui 

 sont jaunatres de meme que les pattes, sont longues, deliees et a filets 

 roniques. On ne lui voit point d'yenx lisses. La femelle porte tine 

 tarriere recourbee en dessus en forme de faucille et de la longueur du 

 corps. 



(C. de Geer. ' Mem. Ins.' iii, p. 433, 1773.) 



MALK IMAGO.- -General colour pale green, yellow 

 dorsally; length some 12-14 mm. Head with the 

 vertex produced to a point between the swollen bases 

 of the antennss, which are very long, and distantly 

 marked with several minute dark brown ring;s. Eyes 



o > 



projecting. . P-ronotum short, much rounded behind, 

 practically without carinse, yellow mid-dorsally, with 

 two small black spots. Elytra fully developed, bright 



FIG. 21. Apex of abdomen and cerci of male Meconema thalassinum 



De Geer (much magnified). 



green with paler nervures, semi-transparent. Wings 

 fully developed, hyaline, tinged with green towards 

 the costal margin. Legs pale, hind femora not greatly 

 swollen at the base ; tympana on fore tibia3 open ; 

 tarsi brown. Cerci (fig. 21) long, slightly hairy, 

 slender, blunt and slightly clubbed at the tip, crossing, 

 not toothed. Subgenital lamina broadly emarginate ; 

 short hairy styles bent backwards. 



FEMALE IMAGO (PL X'VII, fig. 5).- -In colour much as 

 the male ; perhaps slightly less in length. Elytra and 

 irintjs fully developed as in the male. Cerci short, 

 simple. Ovipositor 9 mm. in length ; green with brown 

 tip ; gently curved upwards. Subgenital lamina with 

 two sharp projections in the centre, nearly in contact. 



EGG-LAYING (PL XVIII, fig. 3). On 19 October 



