Mall

via nt ids (Mantodea)

• front legs distinctively modified for catching prey

• elongate prothorax

• toughened forewings

• large, membranous hindwings

SCOKIMOMLIIS (Meeoptera)

• head elongated downward as a beak

• wings of similar size

anckl inskcts (Zoraptera)

• termitelike

• may be winged or wingless See p.80

kock ckawllks ((Jryllohlattodea)

• 'A-l'Ain (1.2-3cm) long •found in cold regions of western North

America and eastern Asia See p.59

44 • INTRODUCTION

Key 6: Arachnids

Arachnids are wingless arthropods with four spinning organs, and some can he identified by pairs of legs. Despite the fact that the group as the type of web they produce. Scorpions have a whole is very diverse in appearance, the major distinctive claws on the end of their powerful groups are easily recognized. Spiders are the pedipalps, and mobile abdominal "tails" with a most familiar arachnids. All spiders have silk- sting. Pseudoscorpions, although quite similar to

si in-simdkks (Solfugida)

• leglike pedipalps

• large, forward-facing chelicerae See p.217

iiarvi:stmi:n (Opiliones)

• pedipalps have 6 segments

• legs usually long and slender

• segmented abdomen (sometimes hard to see)

See p.221

spiders (Araneae)

• relatively short pedipalps

• first pair of legs similar in size to other pairs

• nonsegmented abdomen carries silk-spinning organ si in-simdkks (Solfugida)

• leglike pedipalps

• large, forward-facing chelicerae See p.217

wiiip-spidkks (Amblypygi)

• squat body with broad céphalothorax

• large, spiny pedipalps

• first pair of legs very long

See p.220

iiarvi:stmi:n (Opiliones)

• pedipalps have 6 segments

• legs usually long and slender

• segmented abdomen (sometimes hard to see)

See p.221

scorpions, arc much smaller and lack the "tail." Whip-scorpions have a distinctive whiplike "tail," and in whip-spiders the first pair of legs is very long and whiplike, l icks and mites are distinctively rounded. Because of the dangerous nature of certain species, avoid handling an arachnid unless you are sure that it is a harmless specimen. In fact, the vast majority of arachnids are harmless. Scorpions and other arachnids will bite or sting human beings only in self-defense.

ticks & mitks (Aeari)

• body has no distinct divisions

• legs usually short

• nonsegmented abdomen

See p.223

pski Dose xmrioNS

(Pseudoseorpiones)

• pedipalps like small scorpion claws

• oval abdomen with 11 or 12 segments

See p.215

s( ;orimons (Seorpiones)

• large pedipalps with pincers

• abdomen has long, jointed "tail" with a sting

See p.213

• powerful pedipalps

• abdomen has whiplike tail

See p.219

ticks & mitks (Aeari)

• body has no distinct divisions

• legs usually short

• nonsegmented abdomen

See p.223

pski Dose xmrioNS

(Pseudoseorpiones)

• pedipalps like small scorpion claws

• oval abdomen with 11 or 12 segments

See p.215

Insects

Bristletails

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