Abdomen D Acrostichal B, I Alar frena B, I (12-12) Alula, or Axillary lobe O, 9 Anal Vein V, 6 Antennæ, or Horns A, IV Anus D, II Apical Region C, II Arista, or Seta [_plate_ III] A, IV (6) Axillary Vein V, 7 Basal Region C, II Breast, or Sternum B, III Bristles, Spines, Hair, etc. E Calcar, Spur, or Thorn E Cells of Wings, or Areolets O Cheeks or Genæ A, VI Costa V, _c_ Coxæ, or body-joints C, I (1) Cubital Vein V, 3 Dorsum [_plate_ VI] B, I Empodium, claws and pads C, I (11) Eye Margin A, III (7) Face and Facialia A, V Femora, or Thighs C, I (3) Forceps [_plate_ VI, _fig._ 17] Frons A, III Frontal Lunule [_plate_ VII, 5] A, III (3) Frontal Stripe A, III (1) Frontal Suture A, IV Halteres C, III Hang Vein, or Appendix V, _h_ Hypo-pleura B, III (6) Jowls A, VII Knees C, I (10) Meso-pleura B, III (2) Meta Notum B, IV Meta-pleura B, III (4) Meta-tarsus C, I (5) Mouth A, VIII Mystax A, V (3) O = Cell of wing C, II Ocelli A, I (2) Ocellar Triangle A, I (1) Orbits A, I (7) and A, III (2) Palpi A, VIII (4) Peristome A, VIII (1) Pleuræ, or Side regions B, II Proboscis A, VIII (3) Prothorax B, III (1) Ptero-pleura B, III (3) Scutellum B, I (6) Scutellar Bridges B, I (11-11) Shoulders or Humeri [_plate_ VI, 40] B, I (1-1) Squamæ, or Calyptræ C, IV Sterno-pleura B, III (5) Stigma of Pleura B, III (2) Stigma of Wing C, II Stripe or Band F Sutures A, IV, and B, I Tarsi, or Tarsal (foot) Joints C, I (5-9) Tibiæ, or Shins C, I (4) Thorax B Trochanter C, I (2) V = longitudinal Veins C, II Vena Spuria V, _s_ Vertex, or Crown A, I Vibrissæ, or Mouth Bristles A, VIII (2) X = Cross-Veins of Wings C, II ALPHABETIC LIST OF FAMILIES Name Family Analytic No. Ref.