150 



BRITISH ORTHOPTEEA. 



concliate, or simply a cleft (as in most genera). The 

 mid tibia3 resemble the fore, except for the absence 

 of the tympana. The hind tibia3 have a double row 

 of spines above and below, and the apical spurs below 

 (usually four in number) assist the insect in making 

 its spring, as well as affording a useful point for 

 classificatory purposes. The fore tibia3 may be plain 

 or sulcate : the first and second segments of the tarsi 

 are sulcate, except in Leptophyes, so far as British 

 grasshoppers are concerned. 



Though colour, size, and wing-development are not 

 good points on which to differentiate species, yet, as 

 our nine natives are easily separated by such means, a 

 table is drawn up on these lines. It must, of course, 

 be used for no other purpose than for identifying the 

 British species. 



BEITISH LOCUSTIDS. 



A. Wings reduced to vestiges ; 

 elvtra very small. 



/ */ 



(a). Bright green, with 



minute black spots . ^15 mm. 

 (b). Ruddy brown . .18 mm. 

 Wings and elytra half de- 

 veloped. 



(a) . Brown, with pale margin 

 all round flaps of pro- 

 notum . . .17 mm. 

 (6). Brown, with pale hind 



margin to flaps. . 17 mm. 

 (c) . Pale green,with crimson- 

 brown dorsal surface; 

 very slender species . 

 Wings and elytra fully deve- 

 loped. 

 (a). Clear green. 



(i). Size small . .13 mm. 

 (ii). Size large . . 33 mm. 

 (b}. Green, with dark spots 



on elytra . 

 (c). Brown .... 



L. pnnctatissima. 

 P. griseoaptera. 



B 



M. roeselii. 



M. brachyptera. 



16 mm. C. dorsalis. 



c 



J/. tlialassinum. 

 P. viridlssima. 



35 mm. T. verrucivora. 

 21 mm. M. albopunctata. 



* Average length of the body of the female from the front of the head to 

 the base of the ovipositor. 



