BiG: 
EXPLANATION OF PLATE XXII. 
Third right leg of larva of Aegus roepstorffi, showing 
stridulating surface. 
Second right leg of larva of Aegus roepstorffi, showing 
stridulating surface. 
Right mandible of larva of Aegus roepstorffi. 
Left mandible of larva of Aegus roepstorfft. 
Third right leg of larva of Nigidius dawnae, showing 
stridulating surface. 
Second right leg of larva of Nigidius dawnae, showing 
stridulating surface. 
Third right leg of larva of Nigidius impressicollis, show- 
ing stridulating surface. 
Second right leg of larva of Nigidius impressicollis, 
showing stridulating surface. 
Right mandible of larva of Nigidius impressicollts. 
Left mandible of larva of Nigidius impressicollts. 
