350 AN EXPI.AXATION OF 



Annularis, round, the middle of the same colour with the rest of the 

 vnng. 



DHtoidea, nearly triangular. 



Flexuoxa, irregularly waving. 

 MANDIBUL.E, the mandibles. (See p. 28. PL 10. fg. 1. (/.) 

 Manus, a foot shaped like the claw of a crab. 

 Marginatus, thorax, elytra, is.c. with a free elevated margin. 

 MAXILL.E, organs at the mouth, generally semicircular, pointed at 

 the ends, moving transversely, that is, horizontally, not perpendi- 

 cularly as in the human species, for the purpose of holding and 

 comminuting the food. (See also p. '28. Ft. 10. fg. Q. a. — b. c 

 maxillary palpi?) 



Dentattc, the margins set with sharp pointed processes. 



Forcipata-, like a pair of pincers. 



Furcatcc, forked, divided into two parts at the ends. 



Lwuilata, thick in the middle, and smaller towards the base and the 

 apex. 



Troniinentes, placed straight before the head, and on the same plane. . 

 Mentum, the chin. This part is most observable m the Lvcunus Ccr- 



vus. 

 METAMORPHOSIS.— The transformation of an insect from the larva 

 to the pupa, and previous to its last or perfect state. The meta- 

 morphosis of insects is defined as follows. 



Coarcfata, of an oblong cylindrical shape with no part of the body vi- 

 sible ; as in the Order Omaloptera. 



Ltco?/ipleta, with motionless feet and wings ; as in Coleoptera, Lepi- 

 doptera, t'^c. 



Sc?7)icompkla, when the pupa moves, eats, and has wing-cases ; as in 

 Dcrrnaptera, Orlhopfcra, Dicti/optera, llemiptera, 4c. 

 OCELLI (or Stemmata), little shining eyes generally placed together on 

 the crown of the head, for the purpose of seeing objects at a di- 

 stance and above the insect. 



Dioptrad, with a transparent pupil divided transversely by a small 

 line. 



Sexquialter or iSesguiocellus, a large ocellus inclosing a smaller one. 

 OCULI, the eyes (see p. 21). All i«.src^6- have at least two eyes: the 

 Aruchnoida have six or eight, arranged for the most part on the 

 vertex or summit of the head. They are subject to considerable 

 variety in situation and shape, and are distinguished as under. 



Approximuti, when placed close together. 



Bini, two eyes, one placed on each side of the head- 



G9torati, of a different colour from that of the head. 



Compositi, furnished v/ith many and often numerous lenses, for the 

 purpose of seeing near objects and those at a distance. 



Concolores, of the same colour with the head and body. 



