LOCUSTID.E. 2*7 



wings transparent, tinged with green at the hase ; ab- 

 domen testaceous ; hinder thighs angular, and spotted 

 with black on the inner side; tibiae red. Found 

 abundantly in Egypt, Barbary, and in the south of 

 Europe ; occasionally extending as far north as Paris, 

 and even Britain. 



LOCUSTA DUX. 

 PLATE XV. Fig. 2. 



Gryllus Dux, Linn. Fabr Drury, PI. XLIV Encyd. 



Method. No. 4, (Acrydium) Serville's Revis. Orth. 92. 



ONE of the largest migratory locusts known ; the teg- 

 mina often measuring eight or nine inches from one ex- 

 tremity to the other. The head is dull-yellow, with 

 an olive tinge : the thorax dusky-olive, ridged on the 

 sides, and having an elevated dentate ridge down the 

 back ; tegmina dull-green, with numerous ill- defined 

 dark spots ; wings red, with a black edge, and par- 

 allel rows of black spots, most of them resembling 

 the beards of arrows : abdomen olive-green or y<^ 

 lowish j legs red ; the thighs chequered with white. 

 A native of tropical America. 



LOCUSTA CRISTATA. 



PLATE XVI. Fig. 1. 

 Gryllus Cristatus, Linn. Fabr. RoeseVs Insect, torn. ii. Grytt. 

 PI. 5, figs. 1, 2 Stoirs Sauterelles de passage, PI. 9 b. fig. 30. 



A LARGE species, sometimes measuring nearly four 

 inches in length. Head and eyes brown; thorax 

 olive-green, ridged along the back, and marked with 

 four transverse impressions ; tegmina greyish-green, 



