THE TEUMS rSED IN ENTOMOLOGY. 343 



Marginatum, with a free elevated margin. 



Muticum, not furnished with liorns, spines, or tubercles. 



Nutans, iixed transversely at right angles with the thorax. 



Porrectnm, prominent and elongated. 



Prolongutum tubo, the apex running out into a tube. 



Promincns, on the same plane with the thorax, but narrower. 



Retractile, capable of benig drawn at pleasure within the thorax, and 



concealed there. 

 Retractum,T[i\dCcd within tlie thorax, and not to be distinguished from 



it. 

 Rngosum, wrinkled, marked with waved and elevated lines either 



longitudinally or transversely. 

 Tuberculatum, rough with rigid prominent warts or tubercles. 

 CAUDA, the Tail, a part affixed to the extremity of the abdomen. (See 

 p. 33). 

 Aristata, terminating in a bristle or slender tliread. 

 Biseta, having two slender attenuated setae. 

 Foliacea, spreading out like a membrane. 

 Rostrata, standing out like a beak. 

 Setosa, elongated, slender, gradually attenuated. 

 Triquetra, having three })lane sides. 



Triscta, having three slender attenuated seta% 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 Papilionida 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. 

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



(See p. 30.) 

 CoLEOPTRA, both elytra. 



COLOR. — 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 lie allowed for. 'In study- 

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

 and dark specimens should always be retained. 

 jEruginosus, light blueish green, like verdigrise. 

 Albits, dull white. 

 Albidux, dirty dull white. 

 Afer, the purest and deepest black. 



Atro-purpureux, very dark red, almost approaching to black. 

 Atro-virens, dark green, bordering on dark blue. 

 Aureus, gold-ycUow, without any foreign mixture. 



