ORTHOPTERA. — LOCUSTIDiE. 461 



abdomen (^Jig.5Q. 16.); the wing-covers {^fig- 56. 17.) are exceedingly 

 minute, but the wings are of ample size ; the species are amongst 

 the smallest of the order, but their specific distinctions are not yet 

 understood ; Zetterstedt describing (but with doubts as to their dis- 

 tinctness) eighteen, which Charpentier reduces to two. 



I have described a genus, with very singular antennae, allied to 

 Tetrix, from the Malabar coast, in the Zool. Journ. No. 20. (Tri- 

 petalocera ferruginea) ; also another exotic genus, with the prothorax 

 very large, elevated, and the entire insect being so much compressed 

 as not to exceed the thickness of a card, Hymenotes rhombea (Mem- 

 brans rh. Fahr., and H. triangularis, Proc. Zool. Soc. Nov. 14. 1837-). 



The exotic species of this family comprise some of the most gi- 

 gantic, and at the same time, gayest of the insect tribes ; Locusta dux 

 being in fact little short of a foot in the expanse of the wings. As 

 the species fly much by day, their posterior wings are beautifully 

 coloured, red and blue, with black spots, being prevalent hues. In 

 some of the exotic species the prothorax is crested, the crest indi- 

 cating several tranverse impressions, showing the sectional structure 

 of the prothorax. 



The genus Truxalis is remarkable for its slender form, the prismatic 

 form of its antennae {Jig.SQ. 19.), and the elongated pyramidal-shaped 

 head. The genus Proscopia Klug comprises various Brazilian species of 

 a long and cylindrical form, which have never been observed otherwise 

 than in an apterous state, with the head {fig. 56. 18.) long, the eyes large 

 and prominent, and the antennee very minute, with not more than six 

 or seven joints (eight, according to Brulle) ; the legs are long and slen- 

 der, and scarcely fitted for leaping. Dr. Klug has published a mono- 

 graph upon this genus, which, in its general form seems to constitute 

 a connecting link between the Locustidic and the linear Phasmidiu. 

 The species of the African genus, Pncumora, appears to be still less 

 able to leap, the large vesicular bodies of the males, and the slender- 

 ness and shortness of the hind legs preventing such an effort. The 

 males are furnished with wings and wing-covers, of the ordinary size ; 

 but they are very small in the females, which have the body of the 

 ordinary shape. They are called Blaazops by the Dutch colonists at 

 the Cape, from their bladder-like form. They are silent by day, but 

 make a tremulous and tolerably loud noise by night. (^Spctrrman, 

 Voy. iom. i. p. 312.). The stridulation of this genus is evidently pro- 

 duced in a manner unlike that of the other tribes. On account of the 



