471 
eovers about one-third of the width of costal area, broadening to apex 
where it covers the whole costal area; veins slightly lighter along nodal 
line. Wings fuscous with dark veins. 
The periandrium is tubular with a pair of chitinous, bifurcate spines 
at apex; the penis is tubular with a chitinous rim at apex, but no process. 
The apex of anal segment is cleft for some little distance. The details of 
the genitalia are best understood by the figures. 
Described from one male from Porto Rico (R. T. Cotton, 
January, 1917, Acc. No. 127-17), and one male from Lares 
P. R. (J. More, December, 1920, Acc. No. 150-20). 
Type in H. S. P. A. Experiment Station, Honolulu, T. H., 
No. 1140; paratype in U. S. National Museum, Washington. 
In Melichar’s latest table this would run down to Petru- 
sina Mel. 
Petrusa pygmaea (I‘abr.). Plate XII, Figs. 8, a, b. 
The specimens the writer has before him from Porto Rico 
run down to Petrusa Stal in Melichar’s latest table, and agree 
with his specific description in his monograph; they also agree 
with Stal’s original specific description. Stal states that this 
genus has two transverse lines in the apical area of the tegmina, 

PLATE XII. 
1. Cedusa wolcotti, lateral view male genitalia; a, female pregenital plate 
(seventh abdominal sternite). 
Dysimia maculata, left tegmen; a, left wing. 
3. Parahydriena hyalina, front view frons and elypeus; a, lateral view 
head and pronotum; b, dorsal view head; c, left tegmen. 
4. Colpoptera brunneus, lateral view male genitalia; a, emargination at 
bo 
apex of periandrium with median process; b, lateral view penis and 
apodeme; c, right tegmen; d, left wing. 
5. Acanalonia brevifrons, dorsal view head and pronotum; a, front view 
frons and clypeus; b, profile vertex and frons. 
6. Tetraceratium wolcotti, front view head; a, dorsal view head, pronotum 
and mesonotum. 
Ormenis pseudomarginata, lateral view male genitalia without aedeagus; 
ba | 
a, apex of anal segment; b, lateral view periandrium; ec, lateral view 
penis. 
8. Petrusa pygmaea, lateral view male genitalia without aedeagus; a, lat- 
eral view periandrium; b, lateral view penis. 
9. Flatoides brunneus, lateral view male genitalia; a, ventral view genital 
styles. 
