548 PROCEEDINGS OF THE ACADEMY OF [Oct., 
Fig. 61. — Hypopygivim of G. (L.) alexanderi; ventral aspect of the pleural 
appendages; lettering as in Fig. 59. 
Fig. 62. — Hypopygium of G. (L.) cinerea; ventral aspect of the pleural 
appendages; lettering as in Fig. 59. 
Fig. 63. — Hypopygium of G. (L.) puer; dorsal aspect of right pleurite; 
p.gd. = penis-guard. 
Fig. 64. — Hypopygium of G. (. .) vianca; dorsal aspect of right pleurite; 
lettering as in Fig. 63. 
Fig. 65. — Hypopvgium of G. (L.) manca; lateral aspect; lettering as in 
Fig. 63. 
Fig. 66. — Hypopygium of G. {Gonomyia) calif ornica; dorsal aspect of the 
right pleurite; lettering as in Figs. 59 and 63. 
Fig. 67. — Hypopygium of G. (G.) californica; ventral aspect; lettering as in 
Figs. 59 and 63. 
Fig. 68. — Hypopygium of G. (G.) blanda; dorsal aspect of. the right pleurite; 
lettering as in Fig. 59. 
Pig. 69. — Hypopygium of G. (G.) blanda; ventral aspect of the ventral 
appendage of the pleurite. 
Fig. 70. — Hypopygium of G. (G.) sidphurella; dorsal aspect of the right 
pleurite. 
j?ig 71 — Hypopygium of G. (G.) florens; dorsal aspect of the right pleurite; 
k = dorsal fleshy knob; d = fu-st or dorsal appendage; 2 = second 
pleural appendage; S = third or ventral pleural appendage. 
Fio-. 72. — Hypopygium of G. (G.) florens; lateral aspect of the penis-guard. 
Fig. 73. — Hypopygium of G. (G.) cognatella; lateral aspect of the penis-guard. 
Fig. 74. — Hypopygium of G. (G.) cognatella; dorsal aspect of the right 
pleurite; lettering as in Fig. 71. 
Fig. 75. — Hypopygium of G. (G.) cognatella; lateral aspect of the pleurite; 
lettering as in Fig. 71. 
Plate XXX. — Fig. 76. — Hypopygium of Gonomyia (Gonomijia) flavibasis; 
dorso-lateral aspect. 
Fig. 77. — Hypopygium of G. (G.) flavibasis; ventral aspect of the pleural 
appendages. 
Fig. 78. — Hypopygium of G. (G.) flavibasis; apex of the ventral appendages. 
Fig. 79. — Hypopygium of G. (G.) noveboracensis; pleural appendages, ventral 
aspect. 
Fig. 80. — Hypopygium of G. (G.) noveboracensis; ventral aspect of the left 
side of the penis-guard and the gonapophyses ; a, b, c = horns of the 
fused cylinder. 
Fig. 81. — Hypopygium of G. (G.) filicauda; dorsal aspect of the right pleurite; 
d = dorsal pleural appendage; v = ventral pleural appendage. 
Fig. 82. — Hypopygium of G. (G.) filicauda; lateral aspect of the penis-guard. 
Fig. 83. — Hypopygium of G. (G.) subcinerea; dorsal aspect of the right 
pleurite; lettering as in Fig. 81. 
Fig. 84. — Hypopygium of G. (G.) subcinerea; ventral aspect of the left side 
of the penis-guard. 
Pig 85.— 'Hypopygium of G. (G.) subcinerea; dorsal pleural appendage. 
Pig 86. — Hypopygium of G. (G.) cequalis Alexander; dorsal aspect of the 
right pleurite; lettering as in Fig. 81; a.t. = anal tube. 
Fig. 87. — Hypopygium of G. (G.) virgata; dorsal aspect of the right pleurite; 
lettering as in Fig. 81; ^ = second pleural appendage. 
Fig. 88. — Hypopygium of G. (G.) unicolor Alexander; ventral aspect of the 
penis-guard and the gonapophyses; p.gd. = penis-guard; a = subtending 
arm; g= gonapophyse. 
Fig. 89. — Hypopygium. of G. (G.) unicolor; dorsal aspect of the right pleurite; 
lettering as in Fig. 81. 
Fig. 90. — Hypopygium of G. (G.) mexicana Alexander; ventral aspect of 
the penis-guard; lettering as in Fig. 88. 
Fig. 91.— Hypopygium of G. (G.) mexicana; dorsal aspect of the right pleurite; 
lettering as in Figs. 81 and 87. 
