Plate 11. 
Plate 12. 
TABLE OF THE PLATES. . v 
INSECTA. 
Figs. 11, 12, 13, 15, 17, 18.—Ovipositor of Locusta, 
Fig. 1l.—Apex of the abdomen of Locusta’ viripissima, A.—Last 
dorsal segment. B.—Last ventral segment. C,—Ovi- 
ositor. 
Fig. 12,—One half of the sheath seen from the exterior of Locusta 
EPHIPPIGER, 
Fig. 13.—The same from the inner surface. a.—Superior half of the 
valve. c.—Lower half. 6,—Central smaller, inner valve 
of the same side. 
Fig. 14.—Sete of the ovipositor of a Cicapa from the inner side to show 
the central channel, 
Fig. 15.—External view of the ovipositor of a Locusta, a.—Upper half. 
c.—Lower half. 
Fig. 16.—Apex of the ovipositor ofa Crcapa from beneath. a, a.— 
Superior distended sheath, with teeth on the margin 4, b. 
—The lower sete pushed upwards, so that they project 
beyond the apex of the sheath. 
Fig. 17.—The ovipositor of a Locusta from within. a.—Upper half. 
c.—Lower half. 6.—Internal valve, indicated here only as 
a projecting ridge, 
Fig. 18.—The jointed ovipositor of Cunysis, Kirby and Spence. 
Figs. 1-6.—Male organs of Dyricus MARGINALIS. 
Fig. 1.—View of them beneath, with the last divided ventral plate. A, 
A.—tThe two halves of the ventral plate. B, B.—Muscles 
that affixed them to the preceding one. C, C.—Horny ridges, 
which partly serve these for insertion. D, D.—Muscles which 
unite the transverse ridge with the ventral plates. a—A 
horny ring lying beneath in the prepuce. g, g.—Muscles that 
move the penis. /—Vasa deferentia. 
Fig. 2.—Penis and prepuce separated from the last ventral plate, seen 
from beneath. a.—A horny ring that distends the prepuce. 
b.—Horny plate which lies in it. i.—Membranous portion of 
the prepuce. d.—Sheath of the penis. e.—Penis. g, g.— 
Muscles which move the penis. #.—Vasa deferentia. 
Fig. 3.—The same from above. a, a.—Horny ring of the prepuce, 
running at the margin, and connected with the penis by 
muscles, h,h. %—Membranous portion of the prepuce. k.— 
Horny plate lying in the upper part of the prepuce. 7.—Horny 
scale to which the ends of the horny arch of the prepuce are 
attached. e—Penis. g, g.—Muscles which move the penis. 
f.—Vasa deferentia. 
Fig. 4.—The same seen from the left side. a.—Horny ring of the 
preduce. 6.—Horny scale lying in the lower portion. The 
rest as in the preceding. 
Fig. 5.—The penis, after the removal of the prepuce. a, a.—Mem- 
branous portion of the prepuce, which is drawn back by horny 
ridges, b, which are connected with the horny ring of the 
prepuce c, c, by means of muscles, at its upper margin. d, d. 
—Valves ofthe penis e.—Penis. 
Fig. 6.—Penis, quite free. a.—Ridge which lies in the penis, and closes 
its aperture, b>.—Lower channel, in which the ridge or bone 
lies. 
Figs. 7-10.—Male organs of HypropHiLus PICEus. 
Fig. 7.—Prepuce from above. M.—The removed colon, d, d.—Last 
dorsal segment, with three fenestrations. 0, 6—Horny ring 
which distends the prepuce. E, E.—Sheaths of the penis. 
