1 9 1 o] A natomy of Cecidomyia resinicoloides 5 7 



EXPLANATION OF PLATES. 



All figures greatly enlarged. 



Plate VI. 



Fig. 1. Dorsal view of head skeleton; S. blind sac; A, point oculiforme; 



0, (jesophagus; B, salivary duct; N, nerve. 



Fig. 2. Lateral view of head skeleton; S, blind sac; A, point oculiforme; 

 B, tracheoid duct; O, oesophagus; N. nerve. 



Fig. 3. Sternal spatula; A. A, A, dorsal view; B, lateral view. 



Fig. 4. Dorsal view of tracheal system of inature larva; A, — A,i, dorsal 

 longitudinal trunk; B,,, ventral longitudinal trtmk; Cj — Ck,, C,i, lateral longi- 

 tudinal trunk; Dj — Dj^, lateral transverse tubes to spiracles; E^ — Em, E,,, cross 

 tubes; F, F,, Fj — •F4, branches to nervous system; K^, K,, branches to nervous 

 system; G, branch from dorsal trunk; H, branch to head; R3, R4, Rg, connecting 

 branch between C and D; M, head; S, supernumerary segment. 



Fig. 5. Ventral view of tracheal system of mature larva, lettering same as 

 in Fig. 4, Bg, dorsal turn of ventral longitudinal trunk. 



Fig. 6. Aborted cross tubes of Seg. 10. 



Plate VII. 



Fig. 1. . Dorsal view of alimentary canal of mature larva ; A, head ; B, blind 

 sac; C, ampullae of salivary glands: D, oesophagus; E, Weisman's cell chaplet; 

 F, large-celled portion of salivary glands; G, ventriculus; H. Malpighian tubule; 



1, ileum; J, ventral longitudinal trachea; K, colon; L, rectum; M, anus; P, pos- 

 terior bend of left Malpighian tubule 



Fig. 2. Head skeleton and portion of salivary glands; A, antenna; B, head 

 skeleton; C, oesophagus; D, common duct of salivary glands showing tracheal 

 character; E, ampulla of sahvary glands; F, Weisman's cell chaplet. 



Fig. 3. Sagittal section through larva; A, adipose tissue; B, muscle; C, ali- 

 mentary canal; O, oesophagus; I, ileum; P, Malpighian tubule; M, M,, salivary 

 glands; H, heart; S, blind sac. 



Fig. 4. Cross trachea in segment 11 showing central spongy mass. 



Fig. 5. Lateral view of proctodeum; A, posterior end of ventriculus; B, 

 ileum; C, colon; D, rectum; E, anus; F, Malpighian tubule; L, L,, slender portion 

 of ileum; O, point of origin of Malpighian tubules. 



Fig. 6 Chitinized portion of anterior end of oesophagus. 



Fig. 7. Dorsal view of anal spiracles, 12 — last segment. 



Plate VIII. 



Fig. 1. Dorsal view of nervous system; A, sub-oesophageal ganglion; 

 B, brain; C, one of the paired ganglia of the sympathetic system; F, trachea 

 feeding brain and sub-oesophageal ganglion. 



Fig. 2. Lateral view of nervous system; lettering as in figure 1. T. 

 trachea. 



Fig. 3. Cross section through posterior portion of larva; A, adipose tissue; 

 B, muscle; C, ventriculus; H, heart; M, Malphigian tubule; L, L,, slender 

 portion of ileum corresponding to L, L.,, of Fig. 5, Plate VII. 



Fig. 4. Cross section through ventriculus showing epithelial cells. 



Fig. 5. Cross section through anterior portion of larva; A, adipose tissue; 

 B, muscle; C. ventriculus: M. salivary glands; H, heart; F, pericardial fat cells. 



Fig. 6. Ventral view of anterior portion of larva (portions of segments 1, 

 2 and 3") showing imaginal leg discs, Aj, A,, A3; B, dorsal longitudinal trunk of 

 tracheal system; C, lateral longitudinal trunk; D, tracheal branch feeding brain, 

 this is F„ Fig. 4, plate VI. 



Fig. 7. Dorsal view of portion of segments 2 and 3, showing imaginal 

 -ft'ing discs, Aj and A3; B, dorsal longitudinal trunk: C, lateral longitudinal trunk. 



