CLASSIFICATION 
spicuous. Mouth parts mandibulate. 
Prothorax large. Wings almost always 
four, membranous, subequal or else hind 
pair smaller, complexly reticulate, not 
plicate. Larve thysanuriform or in 
some cases eruciform, and aquatic or 
terrestrial. Example, Chrysopa (Fig. 
24). About six hundred species have 
been named. 
11. Mecoptera.— Metamorphosis indi- 
rect. Mouth parts mandibulate, at the 
end of a deflexed rostrum, or beak. 
Prothorax small. Wings four, elongate, 
membranous, naked, coarsely reticulate, 
or else rudimentary or absent. Larve 
Head 
capitis, 
2 mim. 
Re 
& 
Pct 
louse, 
female. 
_ 
T/ 
Pediculus 
Length, 
eruciform, caterpillar-like, with numerous prolegs, carnivo- 
Fic. 24. 
few known species. 
Chrysopa plorabunda. 
Slightly reduced. 
suctorial; mandibles 
direct. Antenne filiform. 
of imago rudimentary or 
fous: ~Axamplersbitracus (iC mos) eee 
single family, Panorpidz, comprising but 
12. Trichoptera.—Metamorphosis in- 
Mouth parts 
imperfectly 
rudimentary or 
absent. Prothorax small. 
membranous, hairy, veins moderate in number, 
few; hind pair almost always 
the larger, with plicate anal 
area. Larvee suberuciform, 
aquatic, usually case-forming. 
Example, Molanna (Fig. 26). 
Between five and six hundred 
species are known. 
13. Lepidoptera.— Metamor- 
phosis indirect. Mouth parts 
suctorial, mandibles absent or 
TG ae25e 
rudimentary (except in a few Bittacus strigosus. 
a 
9) 
Wings four, 
cross veins 
Natural 
size. 
