Plate 15. 
Plate 16. 
Plate 17. 
TABLE OF THE PLATES. vii 
INSECTA. Vol. III. Page 
Fig. 1.—SpxH©RopeErvs NitTrpicouuts, Chey. 5 - 399 
Fig. 2.—CaLosoMA RUFEPENNE, Dej. : : ° - 402 
Fig. 3.—Cycurus tTaticus, Bon. . : : . 399 
Fig. 4.—Pamporus aurernans, Latr. : . . 399 
Fig. 5.—Head of Poconopmorus 6 : - 403 
Fig. 6.—Hinder Tarsus of PeLropHiLa 4 M - 404 
Fig. 7.—Carasus RATILANS, Latr. S s - 401 
Fig. 8.—PELEcIUM CyaniPEs, Kirby : D : . 397 
Fig. 9.—Masor@us Luxatus, Dej. - : - 406 
Fig. 10.—Palpi of the principal Bempip1on 5 C - 405 
Fig. 1.—Dyrtiscus LuEerminienrt, Chev. : ls 2 409 
Fig. 2.—Dyriscus sErricornis, Payk. A : . 409 
Fig. 3.—Hinder Foot of CoLymBrres : - - 410 
Fig. 4.—Hinder Foot of Hyproporus pLanus, Latr. : - 410 
Fig. §,—Hycrosia HeRMANNI, Latr. 3 i - 410 
Fig, 6.—NoTERUS CRASSICORNIS, Clairy. : : - 411 
Fig. 7.—HaLipLus ELEVATUS . : c - All 
Fig. 8.—Gyrinus sutcatus, Dej. s 5 5 - 413 
Fig. 1.— The left covering horny plate, with the penis of CatticHroma 
MoscHATUM. 6.—The upwards bent penis, furnished at the 
end with a hook. 
Figs. 2-4,—Male organs of CimBExX VARIABILIS. 
_Fig. 2,—From below. a, a, a, a.—The external sheaths, each consisting 
Plate 18. 
of a lower horny and a superior membranous portion. 3, b. 
—The penis, likewise consisting of two halves. 
Fig. 3.—The left half of the sexual apparatus, seen from without. a.— 
Horny basal portion of the sheath. &.—Membranous appen- 
dage. c, c.—Halves of the valvular penis. 
Fig, 4—The same from within, marked similarly. d.—Outlet of the vasa 
deferentia. 
Figs. 5-7.—Male organs of Vespa GERMANICA seen from beneath. 
Fig. 6.—Penis, from the side, distended like a spoon anteriorly, c, with 
a barb, a, by which it hangs attached during copula. 
Fig. 7.—The same, from above, marked similarly. b,—Internal passage 
of the penis. 
Figs. 8, 9, 10.—Male organs of Detrernita Gat. 
Fig. 8.— Lateral view of the whole apex of the abdomen. a, a.— Horny 
ring to which the external sheath is affixed. 6.—External 
sheath of the left side. c.—Penis. e—Anus. 
Fig. 9 —Sheath of the right side seen from within. 
Fig. 10.—Free penis, a, with the aperture c, and the muscles b, which 
attaches it. 
Figs. 11, 12.—Male organs of Cercopis VULNERATA. 
Fig. 1].—The sexual apparatus, enclosed in valves, seen from the left 
side. 
Fig. 12.—The opened sexual apparatus, seen from above. The external 
valves are removed. a, a.—The internal valves. 6, b.— 
The horny penis, consisting of two parts, bent outwards. 
Fig. 13.—Ovaria of EPHEMERA MARGINATA. 
Fig. 14.—Ovaria of Puasma Gieas, Mill. 
Fig. 15.—Ovaria of GryLLUS MIGRATORIUS, 
Fig. 16.—Ovaria of MELoE PRoscaRABEUs. 
Fig. 17.—Anterior aperture of the penis of DErLEPHILA Gat, seen from 
above. 
Fig. 1.—Ovaria of GRYLLOTALPA vuLGaris, Miill. 
Fig. 2.—Ovaria of Lepisma, Trev. 
Fig. 3.—Internal sexual organs of Hippososca, L. Duf. a, a.—QOvaries, 
b.—Uterus.  c,—-Conducting vessels, 
