ORDER III. LEPIDOPTERA. 63 



fortli females only; males likewise are produced, which immediately 

 celebrate their riuplial rite, that is to comnumicate fertility to the whole 

 female posterity of the following summer. 



Genus 48. Chermes. 



The rostrum rising from the breast with a vagina and three inflected 

 setae: antenntE cylindrical, longer than the thorax: u'm gs iowr, de- 

 flexed; thorax gibbous: feet formed for leaping. {PI. 5. Jig. 10.) 

 The larvae of the insects of this genus are furnished with feet and 

 generally covered with down. In the perfect state they greatly resem- 

 ble the Aphides. 



Genus 49. Coccus. 



Antenna filiform : abdotnen furnished with two sets : rostrum rising from 

 the breast with a vagina and setfe : tzco erect rdngs in the males ; 

 none in the females. {PI. 5.fg. 11.) 

 Sp. 1. Coccus Cacti. 



This insect, so useful when properly prepared to painters and dyers, 

 is a native of South America, where it is found on several species of 

 Cactus, particularly the Cactus Opuntia or Prickly-pear. The insects are 

 collected in a wooden bowl, thickly spread from thence upon a flat 

 dish of earthenware, and placed alive over a charcoal fire, where they are 

 slowly roasted imtil the downy covering disappears and the aqueous 

 juices of the animal are totally evaporated. During this operation the 

 insects are continually stirred about with a tin ladle, and sometimes 

 water is sprinkled upon them to prevent absolute torrefaction, which 

 w^ould destroy the colour and reduce the insect to a coal ; but a little 

 I'abit teaches when to remove them from the fire. They then appear 

 like so many dark, round, reddish grains, and take the name of Cochi- 

 ixal, preserving so little the original form of the insect that this pre- 

 cious dye was long known and sought in Europe before naturalists had 

 determined whether it was animal, vegetable, or a mineral substance. 



Genus 50. Thrips. ■ 



Ro.'itrum indistinct : antennte filiibrm, of the length of the thorax : hodi) 

 linear: oWowoz curved upwards: wir.gs four, straight, lying upon 

 the back; longitudinal, narrow, and somewhat crossed. {PL o.fig. 12.) 

 The insects of this genus are small, and are found on the flowers of 



various plants. 



Order III. LEPIDOPTERA. (Glossat.^, Tabr.) 



The insects of this order contain the butterflies, motlxs, and hawk- 

 moths; have all four wings covered with scales or a sort of fai'ina: 

 they have a mouth (the jaws of which have lately been discovered, dc- 



