SYNOPSIS OF THE PRINCIPAL GROUPS. 105 
Certain Points in the Anatomy of Peripatus capensis.—Balfour, 
Quar. Jour. Micros. Science, 1879, p. 431. 
MYRIAPODA. Respiration by traches ; thorax not dis- 
tinct from abdomen ; legs more than eight pairs ; 
antennze one pair; integument chitinous. 
Catalogue of Myriapoda,—Newport, British Museum, 1856. 
The New Zealand Myriapoda.—Hutton, Trans. N.Z. Inst., X.. p. 288. 
INSECTA. Respiration by tracheze; body divided into 
head, thorax, and abdomen ; legs, six; antenne, 
one pair. 
There are seven orders : 
Neuroptera. Four nearly equal membranous 
wings, generally reticulated; mandibulate ; 
metamorphoses incomplete. 
Orthoptera. Wings four; the two anterior 
coriaceous, or sub-membranous ; the two pos- 
terior membranous, folded longitudinally ; man- 
dibulate, labium divided; metamorposes in- 
complete. 
Hemiptera. Wings four, more or less mem- 
branous ; mouth produced into an acute suc- 
torial rostrum, formed by the labium, which 
encloses the mandibles and the maxille; 
metamorphoses incomplete. 
Coleoptera. Wings four; the anterior (elytra) 
hard, meeting down the back by a straight 
suture; the posterior membranous, folded 
transversely ; mandibulate ; metamorphoses 
complete. 
Lepidoptera. Wings four, not folded, scaly on 
both sides ; mouth suctorial, proboscis curled, 
formed by the maxille ; metamorphoses com- 
plete. 
