PARTS OP INSECTS. 
29 
stance^ Cxam ‘ ne< l at the base, will be frequently found of a horny sub- 
^0? thb ( '° ,eoptera > antl 111 some Of the ITcmiptera (as in BlaJIa, Gryllus, 
stance ,J^ a PP® n dagc terminates at the point in a membranaceous sub- 
Rvmenn / ^ t0rm is extrcme b T various in the different genera. The 
sante n/ ^ and s . on . lc . Ne.itroptcra have the ligula situated in the 
edint anner; P llt >t is in these concave, and is frequently prolong- 
"'hol °t a ^° rt "* pro ^ osc ‘ i < which sometimes exceeds the length of the 
and w 11 ° " • ^ ' S mem J'ranaceous, but of a soft and spongy texture, 
6 . suitecl for receiving the impressions of taste. This kind of 
i ocess ts extremely well exemplified in the bee. 
thA 'll’ dle ^ un S U£: an involuted tubular organ, which constitutes 
W ,. ole moutl l 1 ln lepidopterous insects. This is of a setaceous form, 
in m Ci .Tf r ^Tj° n f > 35 * n Pupitiu and Sphinx genera; or short, as 
in most of the Bomlyces and other moths. It consists of two fi lamer,- 
jus pieces, which are externally convex, concave within, and connected 
ongitndmally by a suture along the middle above and beneath. These, 
fio r tlng > * 0In } a cylinder, through which the ncctarcous juices of the 
Th( .- on whlch these insects subsist are drawn up with facility, 
mem- ,f° plec ®f are . not ver .Y closely united, and may be separated by 
S rf p0lnt . When thc inse( t *kes its food, this tube is 
' iw’ * h » ?“? 11 is rolled ,lp s P ira % between the palpi. 
heJS ° r ' - ° part wllidl forms t lle ‘»omh in many of the 
confains as ^a ^ Within ’ >'«' k « hollow, and 
the pobts of whieh^ ’ Ce W m ° rC ^ fine and delicate bristles, 
me points of which these inserts introduce into the body of the am’ 
Thhostriis r e n from which they draw nourishment. 
Pp “ t T? thc ,? encra ^epa, and (W 
dipterous insects \ ‘ " ln the P lace 01 die mouth in most 
often cylindrical tkl T r'” “ eshy ' ret . ractlle > of a single piece, and 
stance, \ nd from\h^ /° r T? * V ° hf *’ wluch are ()f a ■«* sub- 
Culty of taste in bcacy of their teguments must possess the fa- 
Lingua roJvuu Ini desree ' Exim, P le in the Ilouse-fiv. 
according to fie ri “ d /.’ roto f*; are Linneait terms; and arc adopted 
Pressio^bd ££T Qn0i H al : thor - Lignin is a Fabriciafi ex- 
iUcST, , , !-" Pr ° CeSS ° f dlC !0WCr la- 
ments, inclostvi °™ l d °* tx . vo or ,nor<; very small and delicate fila- 
IVi-Vi p l “ sheath o( two valves. 
a Ppendages^pl1 f .j These arc the sin all, moveable, filiform organs or 
sects. In some , „ . 111 cacf ! S ‘ de ° dlc TOOUth in tire generality of in- 
distinctly articulated 6 ^’! 11167 rcs ? nible |; ho antenna-, but are more 
either two, fou" “ d ’®f nt insects, being 
Parted at each sidr <V ’ * ■ ‘ €n ^ ^ an< ^ arc commonly in- 
%lde the e * te » or part of the jaw. In those which haw 
