THE TF.r.MS USED IN ENTOMOLOGY. 343 



Marginal nm, wilh a free elevated margin. 



]\luticum, not I'urnished with horns, spines, or tubercles. 



Nutans, fixed transversely at right angles with the thorax. 



Porrcctuiit, prominent and elongated. 



Proloiigatum tiil/o, the apex running out into a tube. 



Prominent, on the same plane with the thorax, l)ut narrower. 



Pctractilc, capable of being drawn at pleasure within the thorax, and 



concealed there. 

 Ue</'«cf«7«, placed within the thorax, and not to be distinguished from 



it. 

 Rugosum, wrinkled, marked with waved and elevated lines either 



longitudinally or transversely. 

 Tuherxulutum, rough with rigid prominent warts or tubercles. 

 CAUDA, the Tail, a ])art affixed to the extremity of the abdomen. (See 



Aristata, terminating in a bristle or slender thread. 

 Biscta, having two slender attenuated setae. 

 Fo/iacca, spreading out like a membrane. 

 llostrata, standing out like a beak. 

 Sctosa, elongated, slender, gradually attenuated. 

 Triquctra, having three plane sides. 



Trhcta, having three slender attenuated sets, as in 'Ephemera. 

 Chela, the extreme part of the foot, with a moveable lateral toe like 



the claw of a crab. 

 Chrysalis, (the pupa of those PapUionid^ that are often of a golden 



colour) synonymous with Pupa. 

 Cicatrix, an elevated and somewhat rigid spot. 

 CiNGULA, coloured bands or belts surrounding the abdomen. 

 Clypets, a horny horizontal part of the head covering the mouth. 



(See p. 30.) 

 CoLEOPTRA, both elytra. 



COLOll. — The colour of insects varies greatly, and it frequently oc- 

 curs that the species cannot be determined by this alone. Many 

 circumstances will tend to alter the colour; as a change of food, 

 the age, &c. and such casualties should be allowed for. In study- 

 ing the species and arranging varieties, the extreme of both light 

 and dark specimens shovdd always l)e retained. 

 JErnginosus, light blueish green, like verdigrise. 

 A/bus, dull white. 

 A/bidua, dirty dull white. 

 Afer, the purest and deepest black. 



Atro-purpuren<i, very dark red, almost approaching to black. 

 Afro-vircns, dark green, bordering on dark blue. 

 Awcus, gold-yellow, without any foreign mixture. 



