1921] - Crampton: Sclerites of the Head 97 
SUMMARY. 
The principal structures of the head, the sclerites of the 
head capsule, and the subdivisions of the mouthparts may be 
briefly summarized in the following table in which the relations 
of the parts to one another are also shown. 
Occipitareemar Trophiger 
Postcranials 
Parietals. 7. 2.. Vertex 
Adfrontals 
Parafrons 
Epicranium........ Antefrons..... Epistoma 
IRACIES sen ae IBGONS sacra e Postfrons 
Anteclypeus 
Clypeusy cif Postclypeus 
{ Genz, with Basimandibula 
Laterocranium Hypostoma 
|Postgene......\ Paragula 
on 
Gulamentum...... 
Submentum 
Mentum 
Labial palpi 
Palpiger 
Bulabium)..- o5--2 True labium....) Labiosternite 
Labiostipes 
Gloss 
Wiese te: 
Paraglosse 
Basimaxilla 
(CGandow ase: eee 
Waray siee ds pee Maxillary ‘ \Paracardo (Dististipes 
palpus (Eustipes...... Proxistipes 
Body of Stipesis, «741. . (Parastipes Basistipes 
maxilla 
Palpifer 
Galea 
Lacinia 
Mandible 
Antelabrum 
IDeiowmbhanl, ope peoe or 
Postlabrum 
Epipharynx 
Hypopharynx......fLingua 
Paragnaths (parts of maxilla associated with hypopharynx) 
Endoplice 
Body of tentorium 
Frontal plate of tentorium 
Mentoriuim.. ee. . Dorsal anterior arms 
Ventral Anterior arms 
Posterior arms 
