418 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 95 
2b. Tegmina not usually steeply tectiform; abdomen generally not laterally com- 
pressed, devoid of processes on segments 3 and 4; ovipositor incomplete, 
pygofer broad, posteriorly flattened. 
Tribe CIXIINI 
3a. Media arising from basal cell. 
Subtribe CIXIINA 
Genus MNEMOSYNE Stal 
Mnemosyne STAL, Berliner Ent. Zeitschr., vol. 10, p. 391, 1866. (Genotype, M. 
cubana Stal, ibid.) 
Mesonotum with median and lateral carinae straight and strongly 
developed, with a more feeble arcuate carina on each side of middle 
line. ‘Tegmina with M, and M, forking close to Mf, M, and M, fork- 
ing at a greater distance from Mf. 
MNEMOSYNE ARENAE, new species 
PLATE 7, FIGURES 17-26 
Male: Length, 6.3 mm.;tegmen,6.7 mm. Female: Length, 6.0 mm. ; 
tegman, 7.8 mm. 
Vertex hollowed out, width between basal angles equal to length in 
middle, 2.3 times width at apex, base roundly emarginate; transverse 
carina curved anteriorly in middle to touch apex; no median carina 
on vertex. Base of frons visible from above, its anterior border in 
dorsal view slightly convex; lateral areolets not present at apex of 
vertex. Frons almost flat, its lateral margins diverging to level of 
antennae, thence curving mesad somewhat angularly down to fronto- 
clypeal suture; width of frons 1.1 times length in middle, width at 
apex 2.8 times width at base; median ocellus represented by a scar; 
median carina present throughout on frons'and clypeus, sides of both 
carinate; rostrum reaching almost to tip of abdomen. Pronotum 
with a median carina and a carina on each side following the outline of 
the posterior margin of the eyes and turning posteriorly between eye 
and tegula. Tegulae carinate. Mesonotum with five carinae. Hind 
tibiae with two spines. Tegmina with veins granulate, a row of 
granules in cells Se, R,, M;, Mi, Cuia, and Cu,,, each granule bearing 
a microtrichous seta. 
Vertex, clypeus, and genae testaceous, frons and labrum fuscous, 
median carina and frontoclypeal suture pallid, rostrum testaceous with 
the apical j oint fuscous. Pronotum testaceous, a fuscous band between 
eye and tegula, a fuscous spot at inner angle of lateral lobe near 
antenna on each side; mesonotum testaceous or rufous, clouded fuscous 
anteriorly and outside lateral carinae. Legs testaceous, profemora 
