1>28 TERTIAKY INSECTS OF NORTH AMERICA. 



in the disposition of the principal radial branch of thetegmina. The head 

 is large, full, well rounded; the eye small, almost circular, its longer 

 diameter at right angles to the extremity of the vertex. The pronotuni 

 shows no sign of having its lateral borders cristate or even crenulate, but 

 this maybe due to imperfect preservation of the single specimen at hand, 

 on which it is impossible to determine the form of the lateral lobes. Teg- 

 mina much longer than the body, densely reticulated, very ample, expand- 

 ing at the very base, so as to be nearly equal before the extremity; this is 

 destroyed, but is evidently formed somewhat, and perhaps exactly, as in the 

 Steirodon series, since it tapers on either border, but more rapidly on the 

 inner than on the costal margin, its curve indicating that the apex of the 

 wing is above, and probably considerably above, the middle. The scapular 

 vein, in the middle of the basal half of the wing, curves strongly toward the 

 costal margin, nearly reaching it beyond the middle of the same, and thence 

 following nearly parallel and in close proximity to it ; in the broader part 

 of the costal area, beyond the subcostal vein (which acts in a similar man- 

 ner), it emits three or four branches, the larger ones of which fork and, 

 with the branches of the subcostal vein, strike the costal border at equal 

 distances apart; all these branches are straight, and are connected by 

 irregular, weaker cross-veins, while the interspaces are filled with a still 

 weaker, dense mesh-work. The externomedian vein, parallel to and sepa- 

 rated distinctly from the preceding, emits the principal branch where the 

 scapular curves upward ; this branch continues the basal course of the main 

 vein, is straight, forks at about the middle of the wing, each fork again 

 branching at a little distance beyond, the branches of the upper fork strik- 

 ing the border of the wing where it seems probable the apex falls ; all the 

 branches of this fork curve a little, but only a little, downward ; the second 

 branch of the externomedian vein is emitted shortly before the middle of 

 the wing, and does not reach the margin, dying out shortly beyond the 

 middle of the wing. The subexternomedian vein runs above the middle of 

 the remaining portion of the discoidal area, and emits four inferior branches, 

 al subeqiial distances, the first of which forks a.nd lh< second originates 

 opposite the principal branch of the externomedian vein. Apparently the 

 anal area is pretty long. Wings apparently extending beyond thetegmina. 

 The legs are short, slender, the fore tibia- apparently furnished with 'a 

 moderately broad oboxale foramen, the hind tibiae of equal size throughout, 



