$ 353. ; THE INSECTA. 461 
situated here and there vesicular reservoirs, secretes, undoubtedly, with the 
Locustidae, a substance used in the formation of the spermatophores. But’ 
with the Phasmidae, Libellulidae and Ephemeridae, the Ductus ejaculato- 
rius is wholly deficient in all kinds of glandular appendages. 
With the Neuroptera, the various genera present only few modifications in 
their male genital organs. With Panorpa, the two testicles are very simple 
and ovoid; but with the other species they consist of two tufts of long cr 
round follicles. With Myrmeleon, and Hemerobdius, they are oval and 
surrounded by a distinct envelope. The two deferent canals are short, 
and always have on their lower extremity two long or ovoid accessory 
follicles. 
With the Coleoptera, the male organs vary very much. With the 
Carabidae, Hydrocanthari, and Lucanidae, the testicles consist of two 
extremely long, torose caeca,®” of which each is sometimes enclosed in two 
special envelopes.) The Elateridae, Tillidae, Cantharidae, very many 
Heteromera and Coccinellidae, have, on the other hand, a multitude 
of round or oblong, short follicles, fasciculate, composing the two testi- 
cles, which, in some genera, are here also invested by a capsule.“ 
With the Hydrophilidae, and Pyrochroidae, these organs are composed of” 
numerous short, aggregated follicles, situated laterally over a wide extent 
of the posterior extremity of the deferent canals. With the Staphy- 
linidae, and Silphidae, the testicular follicles are pyriform and inserted 
botryoidally on the posterior extremity of the simple or multiramose Vasa: 
deferentia, With the Lamellicornes, Cerambycidae, Curculionidae, and. 
Crioceridae, these organs are formed after a wholly different type, their 
number being two, six, or even twelve on each side. They are usually 
round follicles, flattened disc-like, and from which pass off pretty short 
excretory ducts to the extremity of the two common deferent canals. 
The Vasa deferentia, with the Coleoptera, are usually pretty long ; but 
with the Carabidae, Hydrocanthari and Cerambycidae they are very long, 
spiral or torose.* With a few species, only, is each of them dilated in its 
course into a Vesicula seminalis.°» The accessory glands are never want- 
ing in this order, and they either open, together with the deferent canals, 
into the upper extremity of the Ductus ejaculatorius, or they pass into 
these canals before they reach this duct. 
27 LE. Dufour, loc. cit. fig. 172. 
28 Sialis and Phryganea. 
29 See L. Dufour, loc. cit. Pl. XII. fig. 172-210 
(Panorpa, Myrmeleon, Sialis, Phryganea), and 
Suckow, n Heusinger’s Zeitsch. II. Taf. XVI. 
fig. 15 (Stalis). 
30 For the male organs of the Coleoptera in gen- 
eral, see especially L. Dufour, Ann. d. Se. Nat. 
VI. 1825, p. 152, Pl. IV.-IX. and I. 1834, p. 76, 
Pi. III. Iv. 
81 With Harpalus, the two caeca are united into 
a single clew. 
32 Cybister, Scarites, and Clivina, have two 
testicles invested by a capsule. 
83 Kach testicular fasciculus is composed of from 
three to seven follicles with Dermestes, Heteroce- 
rus, Anthrenus, Oedemera, Helops, Diaperis, 
Tenebrio ; while with Blaps, Pimelia, Mylabris, 
Telephorus, Bostrichus, the Elateridae and Coc- 
cinellicdae, their number is much larger. 
8: There is a Tunica vaginalis with Clerus,Tri- 
chodes, Mylabris, and which, with Galeruca, is 
even common to buth testicles. 
39* 
In very many species this gland- 
35 See Swammerdamm, Bib. der Nat. Taf. 
XXII. fig. 5; Suckow, in Heusinger’s Zeitsch. 
II. Taf. X. tig. 1, 2 (Hydrophilus); L. Dufour, 
Ann, d. Sv. Nat. XIII. 1840, Pl VI. A. fig. 18 
(Pyrochroa). . 
36 The two testicles are multiramose with Si/pha; 
see L. Dufour, Aun. d. Sc. Nat. VI. 1825, Pl. VIL 
fig. 6 
37 Hammaticherus, Anthribus, Lixus and Do- 
nacia have two pairs of testicles ; Melolontha and 
Prionus six, Trichius nine, and Cetonia twelve. 
Beside L. Dufour (loc. cit.), see Suckow, in Heu- 
singer’s Zeitsch. II. Taf. XL. and Straus, Consid- 
érat. &c. Pl. VI. 
38 These torosities are even surrounded with a 
capsule with Cytister ; see L. Dufour, Ann. d. 
Sc. Nat. VI. 1825, Pl. V. fig. 1. 
39 With the Hydrophilidae, there is a vesicular 
dilatation at the lower extremity of the deferent 
canals ; but with Anthribus, and Lirus, itis situ 
ated at tl-2 opposite extremity, 
