Plate VIII. 

 (Figures drawn by A. G. Boving). 



Fig. 9. CoccidotropJms socialis. Anterior part of head from 

 above, showing frons with chitinous spots, clypeus 

 fused with front, membranous short labrum, basis 

 of antenna. 



Fig. 10. Coccidotrophus socialis. Anterior part of head from 

 right side, showing basis of antenna basis of man- 

 dible, upper group of two ocelli, lower group of 

 four ocelli. 



Fig. 11. Coccidotrophus socialis. Epipharynx. 



Fig. 12. Cathartus advena. Head from left side. 



Fig. 13. Coccidotrophus socialis. Spiracle, highly magnified. 



Fig. 14. Cathartus advena. Anterior part of left mandible and 

 maxilla from below. 



Fig. 15. Cathartus advena. Anterior part of left mandible 

 from above. 



Fig. 16. Coccidotrophus socialis. Maxilla, hypopharynx, max- 

 illular area and glossa (= dorsal surface of ligula) 

 facing buccal cavity; bracon, second chitinous rod 

 from hypopharyngeal chitinization ; fos. ac. m, fossa 

 for the accessory mandibular condyle In base of 

 hypopharyngeal chitinization (acces, fig. 17, Plate 

 VIII) ; gal, possibly rudimentary galea; glos, glossa; 

 hyp. ch, hypopharyngeal chitinization ; lac, lacinia ; 

 mxl, maxillular area; oes, oesophagus; pig. mx, pal- 

 piger maxillae ; u, uncus ; setae, setae along chitinous 

 rod number three ; stipes, dorsal surface of stipes 

 maxillse; stpli, chitinous rod between glossa and 

 palpiger labii; 1-2-3-4-5, chitinous rods from hypo- 

 pharyngeal chitinization; I-II-III, basal, second, 

 apical joints of palpus maxillaris. 



Fig. 17. Coccidotrophns socialis. Posterior part of left man- 

 dible from below; acces, accessory condyle fitting 

 into fossa in base of hypopharyngeal chitinization 

 (fos. ac. m, fig. 16, Plate VIII) ; fil, pr, stiff chitinous 

 filaments ; fl, tendon of flexor mandibulae ; mola, gran- 

 ular ventral surface of the molar structure ; r, tendon 

 of retractor mandibulae; vc, ventral condyle of man- 

 dible fitting into fossa of epicranium (vc, fig. 7, Plate 

 VII). 



Fig. 18. Nausibius repanda. Head and anterior part, of thorax. 



