1925] External Anatomy of Head and Abdomen of the Roach 217 
bse.. . Basiserrata 
bsl . . . Basilamina 
bu. .. .Basuncus 
c Broad dolichomeres 
ca. . . . Cardo 
cc.. . . Cardocondyle 
ce.. . .Cercus 
eg. . . . Cerciger 
cl. . . .Clypeus 
cm. . . Basi valvular membrane 
cp. . . . Cardoprocess 
cs . . . . Coronal suture 
ct . . . . Cardotendon 
cth.. . Clypeotheca 
d Slender dolichomeres 
dc. . . . Disticardo 
dg. . . . Distigalea 
dl . . . . Distilingua 
dv... .Dorsal valvulse (dorso- 
valvulae) 
e Pseudopenis papilla 
eha. . . Euhypandrium 
ej . . . . Ejaculatory duct 
ern . . . Emargination of labium 
eng. . . Endogynal plates 
enh . .Endolamina 
enp. . . Endorectal plates 
ent.. . Endotergite 
ep. . . . Epiproct or supraanal 
plate 
eph. . . Epipharynx 
epr. . . Endoprocessus 
eps. . . Epistoma or post clypeus 
epv. . . Epivalves 
et . . . . Extensor gnathotendon 
etg . . . Eutergite 
etn.. .Body of tentorium (eu- 
tentorium) 
eus.. .Eusternite 
ev. . . . Endovalvula 
fa ... . Falx or pointed process 
fgs . . . Frontogenal suture 
fp.. . .Fronts pits (frontocavse) 
fr . . . . Frons or front 
frs... .Frontal suture 
ft . . . . Flexor gnathotendon 
g. . . . . Gnathartus (articulatory 
process) 
ga. . . . Galea 
gb. . . . Galeabacillus 
ge. . . . Gena 
gf . . . . Galea fossa 
gl . . . . Glossa 
gn. . . . Gnathite 
gp Gular pits (gulacavse) 
gpr. . . Gnathoprocess 
gv Pseudovalves (gynovalvse) 
h Gnathocondyle or hypo- 
condyle 
ha. . . . Hypandrium (subgenital 
plate of male) 
hg. . . . Hypogynium (subgenital 
plate of female) 
hph. . Hvpopharynx or lingua 
hpl.. .Hypoplica or endohypan- 
drium 
hs. . . . Hypandrial suture 
il. . . . . Interlabium 
in ... . Incisors 
int . . . Intertentorium 
iv . . . . Inner valves (iniervalvu- 
lse) 
la. .. . Lacinia 
Id ... . Laciniadentes 
If Lacinial fringe (laciniafim- 
brium) 
