ORDER III. LEPIBOPTERA. 63 



forth females only ; males likewise are produced, which immediately 

 celebrate their nuptial rite, that is to communicate fertility- to the whole 

 female posterity of the following summer. 



Genus 48. Chekmes.' 



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

 seta; : antenna cylindrical, longer than the thorax ; icings four, de- 

 flexed; thorax gibbous: fret formed for leaping. {PI. 5.fg. 10.) 

 The lars'ae of the insects of tliis genus are furnished with feet and 

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

 ble the Aphides. 



Genus 40. Coccus. 



Antenna filiform : abdomen furnished with two set£e : rostrum rising from 

 the breast with a vagina and seta; : tico erect Things in the males ; 

 none in the females. {PI. 5. Jig. 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 foimd on several species of 

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

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

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

 slowly roasted imtil the downy covering disappears and tlie aqueous 

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

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

 water is sprinkled upon them to prevent absolute torrefaction, which 

 would destroy the colour and reduce the insect to a coal ; but a little 

 habit teaches when to ren)ove them from the fire. 'J'hcy then appear 

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

 neal, 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. 



Rostrum indistinct : untenne filii'orin, of the length of the thorax : body 

 linear : abdomen curved upwards : wings four, straight, lying upon 

 the back; longitudinal,narrow, and somewhat crossed. {PI. 5.Jig.l2.) 

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



variou-s plants. 



Order III. LEPIDOPTERA. (Gicssata, Fabr.) 



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

 moths; have all four wings covered with scales or a sort of farina: 

 they {lavc a mouth (the jaws of which ha%'e lately been dbcovered, de- 



