216 Zoological Society. 



back of the second joint forming a tuft before the apex. First joint 

 short, subcylindric, curved, stoutest at the base. Second joint three 

 times the length of the first, subcylindric, slightly curved at the base, 

 incrassated towards the apex, which is truncate. Third joint slen- 

 derer than the second, about half its length, nearly cylindric, obtuse 

 at the apex. Eyes nearly round, not very prominent, smooth. An- 

 tennae less than two-thirds the length of the body, slender, grooved 

 below, thickening gradually into a slender obtuse club. 



Thorax moderately stout. Anterior wings subtriangular ; the an- 

 terior margin slightly arched, the outer nearly straight, three-fifths 

 the length of the anterior ; inner margin nearly straight, four-fifths 

 the length of the anterior. Costal nervule swollen at its origin, ter- 

 minating beyond the middle of the anterior margin ; subcostal ner- 

 vure rather slender, throwing off its first nervule at a short distance 

 before, its second immediately before the end of the cell, the third at 

 a point about as far beyond the end of the cell as the origin of the 

 first is before it, its fourth about as far beyond the third as the origin 

 of this lasi is distant from the origin of the second. Fourth sub- 

 costal nervule terminating at the apex of the wing : upper disco- 

 cellular nervule very short ; middle and lower disco-cellular nervules 

 about equal, the former curved inwards, the latter outwards ; a rudi- 

 mentary discoidal nervule extending inwards from the middle disco- 

 cellular nervule : median nervure swollen at its base, its third nervule 

 bent at a considerable angle where it is joined by the lower disco- 

 cellular : submedian nervure stout, curved near the base : internal 

 nervure wanting. Posterior wings obovate, produced into a short 

 tail at the anal angle ; the anterior margin nearly straight, the outer 

 much curved ; the abdominal fold ample. Precostal nervule stout, 

 curved inwards : costal nervure rather stout, curved at its origin ; 

 subcostal nervure rather stout, bent at a considerable angle where 

 the costal separates from it ; its second nervule angular where the 

 straight upper disco- cellular nervule anastomoses with it. Discoidal 

 nervule extending into the cell : lower disco-cellular nervule straight, 

 longer than the upper, anastomosing with the discoidal nervure a long 

 way beyond the anastomosis of the upper disco-cellular. Third me- 

 dian nervule bent at nearly a right angle where the lower disco- 

 cellular anastomoses with it. Anterior legs of the male slender, 

 thinly clothed with scales and long delicate hairs ; the femur rather 

 shorter than the tibia ; the tarsus little more than two-thirds the 

 length of the tibia, one-jointed, nearly cylindric. Anterior legs of 

 the female rather slender, clothed with scales and a few long fine 

 hairs. Femur and tibia of about equal length, the latter nearly cy- 

 lindric ; the apex slightly stoutest, thinly spiny both within and with- 

 out. Tarsus shorter than the tibia, five-jointed, the first joint more 

 than twice the length of the rest combined ; these all transverse : 

 first to fourth bispinose at the apex ; second and fifth with a tuft of 

 hair on each side at the base. Middle and posterior feet with the 

 femora rather stout ; the tibiae very spiny all round, tlieir spurs stout ; 

 the tarsi densely spiny above, and, except the fifth joint, spiny below ; 

 the spines below arranged somewhat in two series, the first joint longer 

 than the rest combined, second about one- third the length of the 



