REFERENCE LETTERS. 



ab abdomen. 



abg abdominal ganglion. 



ant antennae. 



antn antennal nerve. 



eg cerebral ganglion. 



cox coxa. 



ei eye. 



fbc cells of the fat body. 



fern femur. 



fl fore leg. 



fw fore wing. 



hd head. 



hi hind-intestine. 



hi hind leg. 



ht heart. 



hw hind wing. 



hyp hypodermis. 



ism intersegmental muscles. 



lbm labium. 



lhr labrum. 



1m muscles of the legs. 



In nerves of the legs. 



lp labial palp. 



mi mid-intestine. 



ml middle leg. 



mp mouth parts. 



mpm muscles of the mouth parts. 



msth mesothorax. 



mt malpighian tubules. 



mtth metathorax. 



mx maxilla. 



mxp maxillary palp. 



nc nerve cord. 



oes oesophagus. 



ov ovary. 



ovd oviduct. 



ovp ovipositor. 



ovpm muscles of the ovipositor. 



ovt ovarian tubes. 



prth prothorax. 



ps piercing setae. 



rg rectal glands. 



sd salivary duct. 



sg salivary gland. 



st stigma. 



stm sterno-tergal muscles. 



tars tarsus. 



thor i first thoracic ganglion. 



thor 2 second thoracic ganglion. 



thor 3 third thoracic ganglion. 



tib tibia. 



tr tracheae. 



troch trochanter. 



trt tracheal trunk. 



wc wing case. 



wp rudimentary wing. 



