ACKYDII. 567 



cies. Mr. S. I. Smith has observed a female of this species 

 "with the ovipositor forced down between the root-leaves and 

 the stalk of a species of Andropogon, where the eggs are 

 probabl}^ deposited." 



Xiphidium is a genus of smaller size, with the ovipositor 

 nearly straight. X. fasciatum Serville is green, with a brown 

 stripe on the head and thorax. It is common in gardens. 

 According to Hagen and Scudder an undescribed species of 

 Xiphidinm makes longitudinal punctures in the pith of the 

 Cotton plant. 



In Orcliellmmn the ovipositor is large, ensiforni, and up- 

 curved. 0. vulgare Harris is very common northward ; it is 

 pale green, with two brown stripes on the head and tliorax. It 

 has a large transparent shrilling organ, and is a more robust 

 form than the preceding species. Locnsta viridi.s.sima Linn, is 

 a common form in Europe. Westwood states that '■' Hijperho- 

 mala virescens Boisd. from New Guinea, is distinguished by the 

 prothorax extending completely over the abdomen like a pair 

 of elytra," and that Condylodera tricondyloides from Java, in 

 the elongated, constricted prothorax and fine blue colors, ex- 

 actly imitates the Cicindelous genus Tricondyla. 



AcRYDii Latreille. Grasshoppers have the body much com- 

 pressed, the head large, the front vertical, the ocelli generally 

 present, while the antennoe are short, the greatest number of 

 joints being twenty-four. The prothorax is vei-y large, some- 

 times reaching beyond the abdomen, and the wings are 

 deflexed ; the hind legs are enlarged for leaping, and the tarsi 

 are three-jointed. The stridulating noise is produced by rub- 

 bing the thighs against the fore wings, which are long and 

 narrow, while the hind wings are broadly triangular. The ovi- 

 positor, with its accessory pieces, consists of a sultgenital 

 plate formed by the seventh sternite ; the ninth segment is 

 complete, and the blades (tergo-rhabdites) composing the ovi- 

 positor consist of three secondary pieces united together be- 

 tween them. These rhabdites are short, thick, somewhat 

 conical, and corneous. The eggs are laid in a cocoon-shaped 

 mass covered with a tougli glutinous secretion, and containing 

 from fifty to one hundred eggs. TJie pupai are distinguished 



