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Abbreviations. 



aha Anterior sclerite at base of wing (anterior basalare). 



aes Upper region of episternum (anepisternum). 



apt Adanal projection to anal veins (adanale). 



em Epimeron. 



es Episternum. 



/ Pleural fulcrum of wing. 



g Gill plate, or branchial lamella. 



ia Intra-alar sclerite (intralare). 



it Tergite in intersegmental membrane (intertergite). 



m Median pterale (medipterale). 



