BIONOMICS AND DEVELOPMENT OF LYGOCERUS sp. 115 
Trext-ria. 12. 
Nervous system of larva (partly diagrammatic). sb. =sub-oeso- 
phageal ganglion. sp.=supra-oesophageal ganglion. 7'h. 1-3 = 
Thoracic ganglia. 4-11.=abdominal ganglia. 
TaxrriG. US: 
Sp. gr 
Vertical section through the head of a larva of the fourth instar. 
(The muscles of the labrum are shown somewhat diagrammatic- 
ally.) x200. ct.=cuticle. dc. op.=imaginal disk of eye. fb.= 
fat body, hp.=hypoderm. J. m. /br.=lateral muscles of labrum. 
m. m. lbr.=median muscles of labrum md.=mandible. o. sal.= 
aperture of salivary duct. sb. gn.=sub-oesophageal ganglion. 
8p. gn. =supra-oesophageal ganglion. 
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