SCUDDER ON TERTIARY INSECTS. 527 



cis; clypeiis exceedingly large, being longer than the head, nearly twice 

 as long as broad, narrowing slightly, broadly rounded at the tip ; an- 

 tennae apparently biarticulate, the basal joint being invisible, separated 

 as widely as the eyes, the first (visible) joint cylindrical, scarcely longer 

 than broad, the second semi-globular or bluntly conical, as broad at base 

 as the first and of equal length and breadth ; the style scarcely oat of 

 center, more than twice as large as the two joints combined, one-fourth 

 their width at base, tapering on the apical half, composed of three joints, 

 of which the terminal is as long as the other two combined, and the basal 

 is a little longer than the middle joint ; possibly the style has a minute 

 basal joint, as in BlegistorJiyncJms, but, if so, it must be so closely con- 

 nected with the apex of the conical apical joint of the antennae as to 

 form a part of its curve. Eyes naked, separated in front by more than 

 half their own width. As the palpi cannot be seen, it is probable that 

 they are minute and wholly concealed beneath the head. Front equal, 

 clothed rather abundantly with long bristles, more abundant away from 

 tlie middle line. Thorax stout, of equal width with the abdomen; the 

 latter is very much elongated in the female, tapers to a point, is more than 

 twice as long as the thorax in the single specimen before me (where the 

 joints are separated as widely as possible — probably half as long again 

 as the thorax when in a natural position), and broadest on the second 

 and third joints. Legs not preserved. Wings long and slender, tapering 

 on the apical half, all the veins at the apex of the wing subparallel or 

 equally converging toward the tip, having a general longitudinal direc- 

 tion; there are only two submarginal cells, and the peduncle of the third 

 longitudinal vein is nearly one-third as long as the second submarginal 

 cell ; the base of the third longitudinal vein with a portion of the fourth 

 and fifth and the middle bent portion of the anterior intercalary vein 

 form together a continuous, nearly straight, scarcely arcuate, oblique, 

 adventitious vein, extending from the second longitudinal vein near the 

 middle of the wing to beyond the middle of the outer half of the poste- 

 rior border; there are five posterior cells, of which the fourth is closed, 

 and the third and fifth open upon the apical half of the posterior border; 

 the third basal cell is barely open ; there is no reticulation, and all the 

 cells throughout the wing are of remarkably similar breadth. 



This genus would undoubtedly fall into Nemestrina as originally 

 founded; but several genera have been separated from it on good 

 grounds, and the present form must stand in a similar relation to it 

 Apparently it is more nearly related to the South African genus Megis 

 torhynchus Macq. than to any other genus, but diftVrs from it in the 

 want of an additional closed submarginal cell and apical reticulation of 

 the wings, in the remarkable straightriess (as in Trichophthalma Westw.) 

 of the accidental oblique vein beyond the middle of the wing, in the 

 slenderness of the basal and discal cells, and in the simplicity and 

 directness of the sixth longitudinal vein. It appears also to differ to a 

 slight extent in the antennae. 



