iv TABLE OF THE PLATES, 
INSECTA. . 
Plate 10. Fig. 5.—Ducts of the genitalia of Donacta aquatica, Suckow, without 
appendages. 
Fig. 6.—Ducts of the genitalia of PARYGANEA OLERACEA, a.—Vasa 
deferentia. 6.—Vesica seminalis. 
Fig. 7.—Ducts of the genitalia of Dyticus MaRGINALIS, marked the 
same, 
Fig. 8.—Ducts of the genitalia of Apis MELt., Brandt, a, a.—Vesica 
seminalis. 5, b.—Clavate gum-vessels. 
Fig. 9.—Ducts of the genitaliaof MELoLONTHA VUIGARIS, Suckow. a, a. 
—Ducts of the vesica seminalis. b, b—Gum-vessels, with 
their distension. 
Fig. 10.—Ducts of the genitalia of Hypropuivus Piceus, Suckow. a, a. 
—Vasa deferentia. a*, a*.—Vesica seminalis. a, a— 
Ends of the auxiliary testes. b*, b*.—The first fureate 
gum-vessel. 0, b,—The second simple ones, 
Fig. 11.—Ducts of the genitalia of Lamia aprats, Fab. a, a.—Vesica 
seminalis. b—Furcate gum-vessel,with unequal branches, 
Fig. 12.—Organs of Vanessa Urrice, Swamm., male. a.—United 
testes. a®, a®—Vasa deferentia, into which the gum- 
vessels, b, b, open. 
Fig. 13.—Gum-vessel of Catosoma sycopHanta, Suckow. a.—Vasa 
deferentia of one side, which opens into the gum-vessel 
b, b, of the side; that of the other side and the ductus eja- 
culatorious is cut off. 
Fig. 14.—Ducts of the genitalia of Tiputa crocata, Suckow. a, a.— 
Vasa ceferentia, 6,—Gum-vessels. 
Plate 11. Fig. 1.—Apex of the abdomen of a Cicapa. A.—Last dorsal segment. 
B.—Basal joint of the sheath of the ovipositor. C,—Terminal 
joint. D.—Last ventral segment. 
Fig. 2.—Ovipositor with the valves from beneath. B, B.—Basal joints 
of the valves. OC, C.—Terminal joints. D.—The ovipositor. 
Figs. 3, 4, 7, 8.—Male organs of a Cakanus. 
Fig. 3.—Prepuce from beneath. a, a.—The horny ridges of the pre- 
puce. 6.—The horny plate which lies in the lower portion of 
the prepuce. c.—Process in which the penis lies. d.—Last 
dorsal segment. 
Fig. 4.—Prepuce from above, as taken from the ventral cavity. a.—The 
horny ridges which distend the bag of the prepuce. b.—The 
process of the prepuce, in which the penis hes. c.—Apex of 
this process, into which the vasa deferentia extends, d.—Last 
dorsal segment. 
Fig. 5.—Apex of the sheath of the ovipositor of a Crcapa from above, 
toothed on the margin, furrowed in the centre, emarginate at 
the apex to receive the points of the sete, which form the true 
apex of the ovipositor. ; 
Fig. 5. a.—Section. a,a.—The valves. b, b.—The sheath. c—The 
sete. 
Fig. 6.—Section of the mere ovipositor. a, a—The sheath, 6,—The 
sete. 
Fig. 7.—The penis of a Carasus from beneath. a.—Aperture of the 
penis, whence the sperm flows. 
Fig. 8.—Penis from above, with a, lateral moveable process, b, in which 
the muscles are inserted. 
Figs. 9, 10.—Ovipositor of CimBExX VARIABILIS, 
Fig. 9.—The valves opened from beneath, A, A.—The last dorsal seg- 
ment. a@, a.—External valves. 6, b.—Internal valves, or 
saws. c—Central short process, 
Fig. 10.—An internal valve. 4.—Furrow. a,—Lower surface of the 
valve. 6,—Superior surface. 
