SCUDDER ON TERTIARY INSECTS. 533 



fall in the great length of its ovipositor, which is at least as long as the 

 abdomen 5 while in ISteirodon and its allies, so far as I know them, it is sel- 

 dom more than two or three times as long as broad 5 it is also peculiar in 

 the disposition of the principal radial branch of the tegmiua. 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 pronotum 

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

 but this may be due to imperfect preservation of the single specimen 

 at hand, on which it is impossible to determine the form of the lateral 

 lobes. Tegmina much longer than the body, densely reticulated, very 

 ample, expanding 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 bor- 

 der, 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 manner), 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 externo-median vein, parallel to and separated 

 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 striking 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, down- 

 ward ; the second branch of the externo-median 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 subexterno-median vein 

 runs above the middle of the remaining portion of the discoidal area, 

 and emits four inferior branches, at subequal distances, the first of which 

 forks and the second originates opposite the principal branch of the 

 externo-median vein. Apparently the anal area is pretty long. Wings 

 apparently extending beyond the tegmiua. The legs are short, slender, 

 the fore tibiae apparently furnished with a moderately broad obovate 

 foramen, the hind tibiae of equal size throughout, slightly longer than 

 the hind femora, and the latter scarcely extending beyond the abdomen. 

 Ovipositor long, broad, saber-shaped, a little upcurved. 



This is one of the largest, if not the largest, Tertiary Locustariau 

 known. 



Lithymnetes guttatus. — This is the largest insect I have seen from the 



