467 
ACANALONIIDAE. 
Acanalonia brevifrons sp. nov. Plate XII, Figs. 5, a, b. 
Female. Length, 6.9 mm.; tegmen, 8.6 mm. 
Vertex wider than the length in middle, apex widely angular or sub- 
angular; frons much wider than long. No costal area; Se and R arising 
from the same spot on basal cell, Mf near base, fork of M3+<4 very near 
to Mf, Cu without a fork. Anal segment sublanceolate, anus in middle; 
posterior genital styles large, triangular, the apex swollen and roughened, 
but not bearing: teeth. 
Green; slightly brownish over vertex, more so on legs; costa light; 
apical margin from the apex of Se to apex of clavus reddish brown with 
small light marks, slightly reddish along second elaval and hind margin. 
Wings slightly greenish with green veins, slightly brownish over anal area. 
Described from one male from Pt. Cangrojos P. R. (G. N. 
Wolcott, June 24, 1920, Acc. No. 234). 
Type in U. S. National Museum, Washington. 
In Melichar’s latest classification of this family * this species 
would come into Amphiscepa Germar. But Van Duzee has 
pointed out that the type of this genus is an Issid and it is not 
available for Acanaloniidae. If Melichar’s genus is maintained, 
then a new name must be given it. 
FLATIDAE, 
Tetraceratium gen. nov. 
This genus is near to Neocerus Mel., but it is easily recognized by the 
deep angular emargination of the base of the frons, and a corresponding 
emargination of the anterior margin of the pronotum. 
The cells of the costal area and the apical cells form a continuous 
margin from the base of the costa to the apex of the clavus; Se, R, M, 
and Cu arising from basal cell, the forks of R, M, and Cu about equal 
distance from base; M branching out and its apical cells occupying the 
greater portion of apical margin; the branches of Cu pressed together at 
apex of clavus; claval veins forking near apex and entering commissure. 
The apex ot vertex and base of frons deeply angularly emarginate, the 
vertex excavate, its base hidden by the pronotum; the width at base of 
frons, from tip to tip of the horns, double the width at apex, sides slightly 
sinuous, no carinae on frons, the edges slightly raised; elypeal suture 
obseure, clypeus without carinae. Basal segment of antennae as broad as 
long, second segment about twice as long as broad; eyes round without 

* Wytsmann’s Genera Insectorum, fascicule 182 (1923), p. 4. 
