76 AMERICAN ENTOMOLOGY. 



glaucous, with dirty yellowish hair ; abdomen dark chestnut, 

 with whitish incisures. 



Pangonia incisuralis nobis, Journ. Acad. Nat. Sci. vol. iii. p. 31. 



Desc. Front ochreous : ocelli distinct : hypostonia dusky : 

 palpi : and setre of the proboscis testaceous : proboscis black : 

 antenna; pale yellowish : occiput with very short, greenish-yel- 

 low hair : thorax with two distinct obsolete lines : wings reddish- 

 brown : feet yellowish : thighs dark chestnut at base : tergum 

 and venter 9 dark chestnut, polished, the posterior margins of 

 the segments whitish, and slightly hairy ; % pale testaceous, 

 with short hair. 



Obs. This is the only species yet known to inhabit North 

 America. It was brought from Arkansaw by Mr. Thomas 

 Nuttall. 



The upper figure exhibits the appearance of the male, and the 

 lower that of the female. 



GRYLLUS. Plate XXXIV. 



Generic character. Antennae filiform, with from twenty to 

 twenty-five joints; hemelytra and wings deflected, the latter 

 large, much folded ; posterior feet formed for leaping, hardly 

 longer than the body ; tarsi three-jointed; oviduct not exserted j 

 stemmata unequidistant. 



Obs. Insects of this genus are well known to every person in 

 this country by the familiar and characteristic name of " grass- 

 hoppers." They are in some seasons very abundant, and become 

 an inconvenience to the farmer, by devouring his grasses and 

 other vegetable productions. But their increase here is always 

 limited, so that, even when most numerous, a great portion of 

 the crop is saved. There are countries, however, where this is 

 not the case, and we have only to inform the reader, that the 

 migratory locust is one of the members of this genus, to apprize 

 him of their formidable character. " Of all the insects which 

 seem capable of adding to the calamities of the human race, lo- 

 custs seem to possess the most formidable powers of destruction. 

 Legions of these voracious animals of various species are pro- 

 duced in Africa, where the devastation they commit, is almost 

 incredible. The air is darkened by their numbers ; they carry 

 desolation with them wherever they pass, and in the short space 



