316 INSECTS. OKTHOPTERA. 



antennae as long as the body ; head large, rounded ; thorax almost 

 cylindrical ; elytra shorter than the abdomen and wings ; abdomen 

 terminated in both sexes by two filaments, and a perforator in the 

 female ; thighs of the posterior feet long and tumid, and the legs 

 furnished with spines ; spines only at the extremity of the others. 

 8 lines long. Inhabits Europe, in houses. Lam. iv. 260. 



FAMILY VI. LOCUSTARIJE. 



Elytra and wings sloped like a roof; tarsi with four joints ; an- 

 tennae setaceous. 



I. Elytra and wings generally in both sexes. 



Gen. LOCUSTA, CONOCEPHALUS, PENNICORNIS. . 



II. Males winged, females apterous, or with short elytra in the form of arched scales. 



Gen. ANISOPTERUM. 



I 1 1. JJoth sexes almost apterous, with but very short elytra, in the form of rounded 

 and arched scales. 



Gen. EPHIPPIGER. 



Gen. LOCUSTA, Lat. Gryllus, Lin. 



Tarsi with four joints ; antennae long, setaceous, and formed of 

 a great number of indistinct joints ; four unequal palpi, the 

 anterior with five joints, the posterior with three ; head large, 

 vertical ; eyes small, round ; thorax compressed on the sides ; 

 elytra inclined ; abdomen terminated by an edged tail in the 

 females ; legs proper for leaping, the anterior appearing to 

 grow from under the head, and the posterior ones very large. 



L. mridissima, Lat. Body and elytra fine green ; antennae longer 

 than the body ; elytra narrow, longer than the abdomen ; the 

 perforator of the female long, like a flattened hanger. About 2 

 inches long. Inhabits Europe, in meadows Lat. Gen. iii. 100. 



SECTION III. 



Elytra and wings sloped like a roof; posterior feet formed for 

 leaping, and all the tarsi with five joints ; elytra similar in 

 both sexes ; antennae sword-shaped, filiform, clubbed in both 

 sexes, or only in the males. 



Both sexes produce a stridulous noise by alternately rubbing their posterior thighs 

 against the elytra. The first abdominal segment has on each side in the greater 

 number a kind of drum, distinguished exteriorly by a circular or lunated membra- 

 nous operculum. The ovipositor is composed of four hooked pieces united. The 

 ova of many are inclosed in a common envelope, or united by means of a glutinous 

 matter. 



FAMILY VII. ACBIDITES. 



I. Posterior feet shorter than the body, weak, scarcely proper for leaping ; abdo- 

 men tumid or vesicular, at least in one of the sexes ; ocelli at equal distance from 

 one another. 



Gen. PNEUMORA. 



II. Posterior feet longer than the body, robust and proper for leaping ; ocelli sepa- 

 rated by unequal intervals. 



1. Anterior extremity of the pre-sternum not covering the mouth ; labium bifid ; a 

 ball between the hooks of the tarsi. 



