491 



caudad and in contact with the mesopleural suture adjacent to the wing 

 bases, narrowed cephalad, and coming to a rather abrupt end on the 

 cephaHc shoulder; margins of the stripe irregular; metepisterna pale 

 yellow with a triangular brown spot on the caudo-dorsal angle; re- 

 mainder of the pleura and the intersternum pale yellow or buff; legs 

 buff and black or dark brown, the coxae and trochanters pale, the 

 femora with two brown stripes each, a cephalo-dorsal one and a ventral 

 one between the rows of setae; tibiae with a single, cephalo-ventral 

 brown stripe including the cephalic row of setae ; tarsi and claws brown, 

 the dorsum of the tarsal segments usually more or less yellow ; wings 

 with eleven to twelve postnodal cross-veins. Mo arising between the 

 third and fourth postnodals in the front wing and between the second 

 and third in the hind wing; stigma surmounting slightly more than two 

 cells in both wings. 



Abdomen brown and yellowish, long and slender ; terga one and 

 two brown on the dorsum, pale on the sides, the stripe on two con- 

 tracted near the middle ; terga 3-7 with yellow lateral margins, nar- 

 row interrupted basal rings and longitudinal brown stripes on terga 

 eight and ten, and a triangular, lateral, apical, spot on nine; anal ap- 

 pendages (Fig. 128) brown or blackish, the superiors mostly smooth 

 and not coarsely tuberculate on the lateral surfaces, the basal, mesal 

 tooth small, and much smaller than the tooth at the distal third of each 

 superior; inferiors more than half the length of the superiors, black, 

 the tips laterally compressed. 



Female. — Color the same as that of the male. 



Head and thorax not appreciably different from those of the male, 

 with the exception of the slightly wider pale stripes on the mesopleural 

 suture. 



Abdomen shorter than that of the male ; anal appendages of the 

 usual type (Fig. 115); ovipositor extending as far caudad as the apices 

 of the anal appendages or beyond, the lateral valves broad, and with 

 serrated ventral margins, the ventral half being usually black. 



Measurements 



Length, S 50-52 mm. 



Length, 9 46.5 mm. 



Length of abdomen, $ 33—42 mm. 



Length of abdomen, 9 31-34.5 mm. 



Length of hind wings, $ 18.5-24 mm. 



Length of hind wings, 9 20-23 mm. 



Width of hind wings, $ 5 mm. 



Width of hind wings, 9 5 mm. 



