OF WASHINGTON, VOLUME XVII, 1015 13 



Fig. 2, Labrura (Ir); Post-labrum (pi}', Epipharynx (by transparency) 

 (ex); Epipharyngeal shield (es). 



Fig. 3, Labium (li) ; Hypopharynx (by transparency) (fix") ; Salivary duct 

 (sd) ; Stipes labialis (si); Digiti laciniae (dl); Palipiger (pgr); Stipes max- 

 illaris (s). 



Fig. 4, mine made by larva in the first and second instars; dotted line 

 indicates path of later stage larvae through branching rib into the mid-rib. 



Fig. 5, dorsal view of larva of the first and second instars; Antenna 

 (at). 



PLATE III. Head-capsule of larva in the first and second instars. 



Fig. 1, ventral side of head: Epicranium (epc); Labium (li); Salivary 

 ducts (sd) ; Stipes labialis (si) ; Maxilla (mx) ; Stipes maxillaris (s);Cardo 

 (c); Hypostoma (h); Tentorial bridge (Ib); Mandible (md). 



Fig. 2, dorsal side of head: Epicranium (epc); Frons (/); Frontal ridge 

 fused with adfrontal sclerite (adfr) ; Tentorial arms (la) ; Bridge formed 

 by meeting of frontal ridges with hind margin (ob); Rudimentary ocellus 

 (ocl); Labrum (Ir) ; Post-labrum (pi) ; Mandible (md); Hypopharynx (hx); 

 Antennal ring (an) ; Antenna (at). 



PLATE IV. Mature larvae. 



Fig. 1, lateral view of mature larva. 



Fig. 2, thoracic leg. 



Fig. 3, abdominal leg: diagram showing arrangement of hooks. 



Fig. 4, mandible (ventral view). 



Fig. 5, antenna (segments indicated by Roman numerals). 



(If Dampf's interpretation of the antennal joints is accepted, our joint 

 II would become joint I and the seta bearing papilla at the top, joint III. 

 Comp. A. Dampf : Zoolog. Jahrb. Supp. 12, Heft. 3, p. 525, 1910). 



PLATE V. Head capsule of mature larvae. 



Fig. 1, dorsal view of head: Epicranium (epc) ; Frons (/) ; Frontal ridge 

 with adfrontal sclerite (adfr) ; Tentorial arms (la) ; Ocelli (ocl) ; Antennal 

 ring (an); Antenna (at); Labrum (Ir); Mandible (md) ; Maxilla (mx); 

 Spinneret (sp). 



Fig. 2, ventral view of head: Epicranium (epc); Maxilla (mx); Hypo- 

 stoma (h) ; Tentorial bridge (Ib). 



PLATE VI. Trophi of mature larva. 



Fig. 1, lateral view of labium and hypopharynx: Labial palpi (Ip); 

 Spinneret (xp); Salivary duct (sd) ; Stipes maxillaris (s); Stipes labialis 

 (si) ; Point of attachment of lacinia (a/0; Maxillulac (mxl). 



Fig. 2, labium and maxillae (ventral view): Spinneret (sp) ; Labial pal- 

 pus (Ip); Stipes labialis (si); Menturn (w); Submentum (sm); Cardo (c); 

 Maxilla (mx); Stipes maxillaris (s); Membrana articularia (mb). 



PLATE VII. Labrum, Epipharynx, and Hypopharynx of mature larva. 



Fig. 1, Epipharynx (ex) ; Epipharyngeal shield (ex) ; Internal and external 

 epipharyngeal plates (ep); Epipharyngeal tufts (el); Sensory puncture 

 (spl). 



Fig. 2, labrum (Ir); Postlabrum (/;/); "Kpistoina (e). 



