232 



CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



EXPLANATION OF PLATE XXIL 



Blepharocera capitata Loew. 



Fig. I. Section through the compound eye of adult female: o., ocelli; br .^ 



brain; /./., large facets; s.f., small facets; o. /., optic lobes. 



Fig. 2. Dorsal plate of male genitalia. 



Fig. 3. Ventral plate of male genitalia. 



Fig. 4. Genitalia of female, dorsal aspect. 



Fig. 5. Papillae, enlarged, on female genitalia. 



Fig. 6. Genitalia of female, ventral aspect . 



Bibiocephala elegantulus von Roder. 



Fig. 7. Genitalia of female, ventral aspect. 

 Fig. 8. Genitalia of male, ventral aspect. 



Bibiocephala doanei Kellogg. 



Fig. 9. Mouth-parts of female: /.(?/»., labrum-epipharynx; wd^., mandibles; 

 mx. /., maxillary lobe; nix. p., maxillary palpus; hyp., hypo- 

 pharynx; /z., labium; pg., paraglossa. 



Fig. ID. Mouth-parts of female in cross-section, near the base, diagrammatic; 

 letters as for fig. 9 except lb., labrum-epipharynx . 



Fig. II. Mouth-parts of female in cross-section, near tip, diagrammatic; 

 letters as for fig. 10. 



