EXPLANATION OF PLATES. 
LETTERING OF THE ANATOMICAL PLATES. 
The Head. 
epic, cpieranium. 
cly , clypeus. 
a*. cly, ante-clypeus. 
p. cly, post-clypeus. 
lb, or Ibr, labrura. 
lb, labium. 
yena, gena. 
gula, gula. 
ant, antenna. 
e, eyo. 
oc, ocelli. 
occ, occiput. 
of, occipital foramen. 
mar, lat maxilla. 
mx', 2d maxilla. 
р, palpus. 
с, cardo of maxilla. 
st, sti, or stip, stipes of maxilla. 
lac, laciuia of maxilla. 
8. in., submentum. 
in, men turn. 
palpr, palpiger. 
lig, ligula. 
le, lamina exterior of ligula. 
li, lamina interior of ligula. 
ind, mandible. 
The Thorax. 
PRO, prothorax. 
MESO, raesothorax. 
META, metathorax. 
n, notnrn of prothorax, 
n', notum of mesothorax. 
n ", notum of metathorax. 
p. 8c, prrescutura of prothorax. 
sc, scutum of prothorax. 
8cl, scutellum of prothorax. 
p. 8cl, post-scutellum of prothorax. 
p.sc' ) 
sc' 1 
gc y > the same scleritea of nieaonotum. 
p. scl' J 
The Thorax— Continued. 
p. sc 11 i 
hC „, > the same aclerites of metanotum. 
8Cl" 
р. 8Cl" J 
8t, stenium of prothorax. 
8t', sternum of mesothorax. 
st", sternum of metathorax. 
epis, episternum of prothorax. 
epis', epistornum of mesothorax. 
epis", episternum of metathorax. 
em, epimerum of prothorax. 
em', epimerum of mesothorax. 
ein", epimerum of metathorax. 
te, trochantine of prothorax. 
te', trochantine of mesothorax. 
te", trochantine of metathorax. 
cx, coxa of prothorax. 
ex', coxa of mesothorax. 
cx ", coxa of metathorax. 
tr, trochanter of prothorax. 
tr', trochanter of mesothorax. 
tr", trochanter of metathorax. 
8.-epi8, &c., sur-episternuui. 
s.-em, &c., sur-epimerum. 
i.-epis, &c., infra-episternum. 
i.-em, &c., infra-epimerum. 
pes, leg. 
pt, patagia. 
W 1 , front wing. 
W s , hind wing. 
The Abdomen. 
A, abdomen. 
с, cercopoda (cerci). 
rh, rhabdite, or elements of the ovipositor, or 
clasper in the male. 
ur, urosternite, or sternum of an uromere.* 
tg, tergal sclerito or tergite. 
pen, penis. 
st, stigma or spiracle. 
D, dorsal view. 
L, lateral view. 
V, ventral view. 
* The author has sometimes inadvertently used the term urite instead of urosternite ; Lacaxe-Duthier'a 
Wm urite is equivalent to our uromere. 
The engraver has in some oases omittoclj the accents distinguishing the parts similarly lettered on the 
plates, but no confusion is likely to arise, upon careful examination of the figures and comparison with 
the text. 
(i) 
