46 BULLETIN 1032, U. S. DEPARTMENT OF AGRICULTURE. 
Explanation of symbols applied to genitalia. 
Ae = axlceagus. Hp = harpe. 
An = anellus. Si = socii. 
CI = clasper. U = uncus. 
Cn = eornnti (spines on penis). Ym = vinculum. 
Gn = gnathos. 
Plate III. 
Rhopobota naevana: 
A. — Dorsal view of head capsule of larva, showing setal arrangement. 
B. — Lateral view of head capsule of larva, showing setal arrangement. 
C. — Arrangement of crochets of abdominal proleg of larva. 
D. — Egg. greatly magnified. 
E. — Ventral view of tenth abdominal segment of larva, showing anal fork. 
F. — Lab rum of larva. 
G. — Epipharynx of larva. 
Explanation of symbols applied to larva. 
A 1 . A 2 , A 3 , A a =setse and puncture of anterior group of epicranium. 
Adf\ Adf 2 , Adf a =adfrontal seta? and puncture of epicranium. 
ADFR=adfrontal ridge of larval head. 
ADFS=adfrontal suture of larval head. 
Af==anal fork. 
E 1 , E 2 =epistomal setae. 
ER=epipharyngeal rod. 
I] S= epipharyngeal shield. 
ET=epipharyngeal setae. 
F 1 , F a =frontal seta and puncture of epicranium. 
FR^frons of epicranium. 
G 1 , G a =genal seta and puncture of epicranium. 
L\ L a =seta and puncture of lateral group of epicranium. 
La 1 , La 2 . La 3 =lateral seta? of labrum. 
Lp=labral puncture. 
LR=longitudinal ridge of epicranium. 
M\ M*, M 3 =ruedian seta? of labrum. 
O 1 , O 2 , 3 =seta3 of ocellar group of epicranium. 
P\ P 2 , P a , P b =setse and punctures of posterior group of epicranium. 
SO 1 , SO 2 , SO 3 , SO a =seta? and puncture of subocellar group of epicranium. 
X=ultraposterior setae and puncture of epicranium. 
Drawings on Plates I, II (except C). and III were made under the author's 
supervision by Miss E. Edmonston, of the Bureau of Entomology. The male 
genitalia (PI. II, C) were drawn by Miss Ada F. Kneale, formerly of the Bu- 
reau of Entomology. 
