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U.S. NATIONAL MUSEUM BULLETIN 277 



Figure 125. — Rrevitrichia griseola (Coquillett), male, female: a, male wing; h, female wing; 

 c, d, lateral aspects of male and female heads; e, }, enlarged details of male and female 

 antennae; g, dorsal aspect of female head; h, i, ventral and lateral aspects of male ter- 

 minalia; /, ventral left and dorsal right aspects of female 8th and 9th segments; k, lateral 

 aspect of female 8th and 9th segments; /, bursal structure. 



Male. — Head cream; eyes red-orange-brown, darker below; frons 

 triangular, slightly more than one-third the distance from the antennal 



