35 



76. Last joint of auteuuif at least twice as long as the second 77. 



Last Joint at most only slightly longiT than this second (]>. 143) Echinomifia. 



77. Second segment of abdomen bearing at most only two marginal macrochietie, 



hind tibia' not ciliate 78. 



Seconal segment bearing at least four marginal macrochietie, hind tibia- out- 

 wardly densely ciliate with llattened seta- (p. 123) lih[>haripeza. 



78. Diameter of the head at the vibrissa' much shorter than at base of antenn.c, third 



joint of the antenna' at least two and one-half times as long as the second. 



(p. 128) UUarcUa. 



Diameter of head at the vibrissa' as long as at base of antenna", third joint of 



antennie less than twice as long as the second (p. 131) Braclnjcoma. 



79. Proboscis beyond the basal articulation at most one and one-iifth times as long 



as height of bead 8L 



Proboscis beyond the basal articulation at least one and one-third times as long 

 as height of bead, eyes bare 80. 



80. Apical cell ending at or close to the extreme tij) of wing 82. 



Apical cell ending far before the extreme tip of wing, proboscis geniculate near 



the base only 81. 



81. Ridges of face bristly on at least the lower three-fourths, apical cell closed, the 



petiole longer than the small ciossvein (]>. 711) Chatoffloasa. 



Ridges of face never bristly on more than the lowest fifth, apical cell open. 



(p. 85) Aphria. 



82. With only one geniculation in the pioboscis, situated near its base 83. 



With two geuiculations, one near the base and the other near the middle, facial 



ridges never bristly on more than the lowest fourth (p. 7")) S'qihona. 



83. Facial ridges bristly on at least the lower half (p. 73) Isoglossa. 



Facial ridges never bristly on more than the lowest lifth (p. li) Epiiirimijia. 



84. Abdomen bright green or bluish green, facial ridges never bristly on more than 



the lowest fourth, eyes hairy (p. 89) Gi/muocliaia. 



Abdomen black or more or less yellowish. 



Apical cell ending I'ar before the extreme tip of wing 85. 



Apical c(dl ending at or close to the extreme tip of wiug^ 129. 



85. Last section of iil'th \('in linin thanjou w -liaiy as long as the piececung section. . 87. 

 Last section of fifth \ ein almost as long as the preceding section, bend of fourth 



vein with a long appendage, eyes bare or with indistinct, short, sparse hairs, 

 ocellar bristles directed obliquely forward 86. 



86. Bristles of facial ridges confined to their lowest third (p. 76) lleteropterina. 



Bristles ascending at least to upper third of the ridges, .(p. 77) riacjiprospkerysa. 



87. Ocellar bristles when present directed obliquely forward 89. 



Ocellar bristles curving backward, apical cell closed and petiolate 88. 



88. Penultimate joint of arista over four times as long as broad, facial ridges bristly 



on more than the lower half (p. 79) JHstichona. 



Penultim.ite joint shorter than broad, facial ridges never bristly on more than 

 the lowest lifth (p. 68) Lenvostoma. 



89. Eyes bare, or with indistinct, short, sparse hairs 99. 



Eyes distinctly bairy 90. 



90. Second segment of abdomen bearing at most only three pairs of macrocha'tai in 



the middle of the dorsum 01. 



Second segment thickly covered with macrocha'ta- on at least two-thirds of its 

 length (p. 145) Bombylioiniiia. 



91. Facial ridges never bristly on more than the lower half 94. 



Facial ridges bristly on at least th«ir lower two-thirds 92. 



