ORTHOPTERA. 121 



Crickets in having long antennae, a musical apparatus in 

 the wing-cases of the male, and a projecting ovipositor 

 in the female. The latter, however, differs in form 

 from that of the Crickets, being usually flattened and 

 curved or " sabre-shaped." The wing-case of the 

 female (fig. 43) is simple. The Gryllid are more 

 slender in form than p. 43 



the Crickets, and their 

 longer and slighter 

 limbs give them an 

 appearance of greater 



.. * . . Wing-case of Acrida viridissima. 



lightness and activity. 



They differ also in their shelving, roof-like wing-cases, 

 in the form of the tarsi, which are broad and fleshy 

 on the under side, and in the number of the tarsal 

 joints, which in this family alone is four. 



The English species of Gryllid number about twelve, 

 and are found chiefly upon trees, &c. There are among 

 them several in which the wings are either absent or 

 imperfectly developed ; and in one wingless species, 

 Ephippigervirescens, the wing-cases are very short indeed, 

 and (a circumstance which renders this insect remark- 

 able) are capable of producing the stridulous sound in 

 both sexes. On the other hand, the pretty little slender 

 green Grasshopper of the oak, furnished with long wing- 

 cases and large wings, is the only species altogether 

 destitute of the musical apparatus in the wing-cases. 



The large green Grasshopper is a conspicuous species, 

 measuring 3^ inches from tip to tip of the extended 

 wings. 



The remaining family consists of the LocustidaB, or 

 short-horned Grasshoppers, and, in other countries, of the 

 Locusts commonly so called. 



