ORDER V. HYMENOPTERA. 67 



is often exserted, and with which the eggs are deposited either in the 

 bodies of the caterpillars of other insects, or in wood. From these eggs 

 the larvEE are produced, which in some have no feet; in others more 

 than sixteen. They change to pupce incompletfc, which are inclosed in 

 cases. Some of the insects of this Order live in societies, others are 

 solitary. 



Genus 60. Cyxips. 

 JSLouth with a short membranaceous maxilla with one dent : an arched 

 horny mandible cleft at the apex : a short, cylindrical, entire, horny 

 lip : four short unequal palpi : antenna moniliform, aculeus spiral, and 

 in general hidden within the body. 



The Cj/nipes pierce the leaves, &c. of plants with their sting, and de- 

 posit their eggs in the wound; the extravasated juices rise round it and 

 form a gall, which becomes hard, and in this the larva lives and feeds, 

 and changes to a pupa. 

 Sp. 1. C. Quercusfolii. (PI. Q.Jig. 1.) 



The larva is found in galls, adhering to the under side of oak leavc^, 

 of the size of hazel-nuts. 



Genus 61. Textiiredo. 

 Month with a horny arched mandible, dcntated within : maxilla: obtuse at 

 the apex : lip cylindrical and trifid : palpi four, unequal, and filiform. 

 The larvLe of the insects of this genus have from sixteen to twenty- 

 eight feet; a round head: when touched they roll 'themselves together. 

 They feed on the leaves of plants. When full-grown, they make, some- 

 times in the earth and sometimes between the leaves of the plant on 

 which they feed, a net-work case, and within it change to a pupa in- 

 compkta, which for the most part remains during the winter in the 

 earth. The species are very numerous, and consist of many natural 

 genera. 



Sp. 1. T. ScropJiulariiC. (PI. S.Jig. 2.) 

 Inhabits the Water Betony. 



Genus 62. Sirex. 

 Mouth with a thick, horny mandible, truncated at the apex, and denti- 

 cidated : an incurved, acuminated, cylindrical, ciliated maxilla, and a 

 lip, both of them membranaceous and entire; the whole short: palpi 

 four, the hind ones the longest, increasing towards their apex : an- 

 tennce filiform, with more than twenty-four equal articidations : ovi- 

 duct exserted, stiff, and serrated : abdomen sessile, terminating in a 

 point or spine : zolngs lanceolated, and not folded. 

 Sp. 1. S. Gigas. {PL Q.fg 3.) 



Genus 63. Ichneumon. 

 Mouth with a straight membranaceous, bifid maxilla, rounded at the 

 apex, dilated, ciliated, and horny: an arched, acute, horny mandible, 



E 2 



