231] 



HEAD OF DIPTERA— PETERSON 



61 



EXPLANATION OF PLATES 



ABBREVIATIONS USED 



a.a Anterior arms of the tentorium 



a.e.s Arms of the epicranial suture 



a.f Antennal fossa 



al.c Alimentary canal 



ant Antenna 



ar Arista 



a.s Antennal sclerite 



bph Basipharynx 



bpr Basiproboscis 



b.t Body of the tentorium 



c Clypeus 



ca Cardo 



c.e Compound eye 



ch Chitinized 



ch.th Chitinized thickening 



c.l.s Clypeo-labral suture 



cu Cornu 



d.a Dorsal arms of the tentorium 



de Depression 



dpr Distiproboscis 



ep Epipharynx 



e.s Epicranial suture 



f Furca, also f-i, f-2, and f-3 



fa Facet 



fl Flagellum 



fr Front 



fr.c Fronto-clypeus 



fr.s Frontal suture 



g Galea 



ge Gena 



gl Glossa 



h Hook 



hp Hypopharynx 



hy Hyoid 



i.a Invagination of the anterior arm 

 of the tentorium 



i.a.d Invagination of the anterior and 

 dorsal arms of the tentorium 



i.d Invagination of the dorsal arm 

 of the tentorium 



i.p Invagination of the posterior 

 arm of the tentorium 



k Kappa (sclerite) 



1 Labrum 



la Lacinia 



le Labella 



l.ep Labrum epipharynx 



lg Ligula 



li Labium 



m Membrane 



md Mandible 



me Mentum 



mpr Mediproboscis 



m.ps Main pseudotracheae 



mx Maxilla 



mx.pl Maxillary palpus 



n.s Neck sclerite 



oc Ocellus 



oca Ocellar area 



occ Occiput 



oe Oesophagus 



oe.p Oesophageal pump 



o.f Occipital foramen 



o.l Oral lobe 



o.s Ocular sclerite 



p. a Posterior arms of the tentorium 



pd Pedicel 



pgl Paraglossa 



po Postgena 



pocc Parocciput 



ppo Parapostgena 



pr Proboscis 



