544 TERTIARY INSECTS OF NORTH AMERICA. 



riably its character, and no terminal thread can be seen in any of them, 

 nor any indication of joints in the style ; this brevity of the style seems to 

 be peculiar. As far as the neuration of the wing can be made out (there 

 must remain some doubt upon this point until better examples are discov- 

 ered) the course of the auxiliary vein can not be determined ; the first 

 longitudinal vein appears to end before the middle of the costal border ; 

 the second originates abruptly from the middle of the first longitudinal 

 vein, and terminates (certainly) only a little way before the tip of the wing ; 

 the third runs very nearly parallel to the second longitudinal vein, termi- 

 nates at the tip of the wing, and is perhaps connected by a cross-vein with 

 the fourth longitudinal vein scarcely within the extremity of the first longi- 

 tudinal vein ; the fourth longitudinal vein originates from the fifth or sixth 

 a little before the origin of the second longitudinal vein, diverges rapidly 

 from the third beyond this connection, and is arcuate, curving upward 

 again before reaching the posterior border and running outward to the 

 outer border ; the fifth longitudinal vein curves still more strongly from 

 the fourth, until it reaches the middle of the posterior border, to which it 

 suddenly drops, and scarcely above which it is united with the fourth 

 longitudinal vein by a long, oblique cross-vein. The femora are stout, the 

 front pair largest at the base and tapering, the other pairs subequal 

 throughout, all armed externally above and below with a row of very deli- 

 cate, nearly straight spines, the upper row perhaps wanting on the middle 

 femora, and the lower row developing into longer and stiffer bristles on the 

 apical half of the fore femora. The tibiae are equal, a little longer than the 

 femora, considerably slenderer but still rather stout, furnished alike with 

 several straight, longitudinal rows of minute spines, and on the outer side 

 with three or four distant, moderately stout, longer spines (less prominent 

 on the fore tibiae than on the other legs), and at the tip with a cluster or 

 several similar spines or spurs. The tarsi are very much slenderer than 

 the tibia 1 , longer than they, the other joints slenderer than the metatarsus, 

 all profusely armed with exceedingly delicate spines or spiuous hairs, 

 arranged regularly in longitudinal rows ; at tip is a pair of very slender, 

 pretty long, strongly curved claws, and apparently a pretty large pulvillus. 

 The brevity of the antennal style, the length of the first longitudinal 

 vein of the wing, the approximation of the middle transverse vein to the 

 base, the strong arcuation of the fourth longitudinal vein, the obliquity of 



