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480 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 95 
gins subparallel, more ampliate in distal third; clypeus rather small, 
lateral margins not carinate; antennae short. Pronotum as long as 
vertex, tricarinate, lateral carinae diverging posteriorly, anterior 
border arcuately convex, posterior border emarginate, sometimes with 
a median notch; mesonotum broader than long, tricarinate, lateral 
carinae arcuate, joined to median carina anteriorly. Tegmina broad, 
costal margin strongly curved, sutural margin straight or nearly so, 
oblique, subcosta and radius giving off several branches, usually fur- 
cate, to costal margin. Posttibiae with three spines. 
ALCESTIS VITREA, new species 
PLATE 14, Figures 385-389 
Male: Length, 6.0 mm.; tegmen, 6.4mm. Female: Length, 6.4 mm.; 
tegmen, 7.0 mm. 
Vertex broader than long in middle (2.4: 1), median carina obsolete, 
frons longer than wide (1.4:1), median carina feebly present, rather 
broad. ‘Tegmina with anterior vein (costa) reaching margin basad of 
middle, 18 oblique transverse veins attaining costal margin, Sc+R 
forking one-quarter from base, Sc giving off four branches, two or 
three of them biturcate anteriorly, R with four branches apically, 
M with six, Cu, with seven reaching margin, apex of clavus distad of 
middle. 
Pallid green; transverse veinlets near margin of tegmen and a spot 
hear commissural margin at junction of claval veins fuscous. 
Anal segment of male three times as long as broad, bifid at apex, 
widened distad of anus which is somewhat before middle. Aedeagus 
with periandrium short, comprising a ring basally with its ventral — 
margin produced posteriorly, the ventral prolongation troughlike, 
with an oblique lobe on each side apically, that on right side finger- 
like, the other twice as broad; penis tubular, upturned distally, a 
deeply bifurcate process arising on left near base, the dorsal limb 
sloping upward, then mesad across middle, then bent outward, the 
ventral limb with parallel sides, narrow, directed horizontally back- 
ward, sharply defiexed at apex where it is somewhat footlike in outline, 
distad of this process penis with two pointed flattened plates in middle 
apically, surrounded by a thick membrane. 
Ovipositor with first valvulae narrow, elongate, bearing nine or ten 
small spines on distal half of dorsal margin, the apical pair larger than 
the others; lateral styles narrow, with eight or nine small teeth at 
apex, four large on apical margin, four or five small submarginally in 
an approximately parallel row. 
Keg elongate-ovoid, with sides subparallel for most of their length, 
smooth, obliquely truncate at one pole with a minute process at apex, 
situated on a narrow hyaline rim, traversed by several wavy lines. 
