<§. 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 ejaculcUo- 

 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 Pariorpa, the two testicles are very simple 

 and ovoid ;*-''^' but with the other species they consist of two tufts of longer 

 round follicles.^** With Myrmeleon, and Hemcrobius, 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, Hydroeanthari, 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 

 deferentiaS''^^ 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 shorfe 

 excretory ducts to the extremity of the two common deferent canals.'""' 



The Vasa defereiitia, with the Coleoptera, are usually pretty long ; but 

 with the Carabidae, Hydroeanthari 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 seyninaUsy'''*'' The accessory glands are never want- 

 ing in this order, and they either open, together with the deferen-t canals, 

 into the upper extremity of the Ductus ejaculatorius, or they pass into 

 these canals before they reach this duct. In very many species this gland- 



27 L. Dufour, loc. cit. fig. 172. 35 See SwaYnmerdamm, Bib. der Nat. Taf. 



^ Sialis and Phryganea. XXII. fig. 5 ; Suckow, in Heusinger's Zeitschi. 



29 See L. Dufoiir, loc. cit. PI. XII. fig. 172-210 II. Taf. X. fig. 1, 2 {Hydrophilus) ; L. Dufour, 

 (Panorpa, Mi/rme/eoyi, üia/is, Phri/tranea), aiul Ann. d. Sc. Nat. XIII. 1840, PI. AI. A. tig. 18 

 Suckow, in Heusinger's Zeitsch. II. Taf. XVI. (Pi/rochroa). 



fig. 15 (Sia/is). •* Tlie two testicles are multiramose with SiCpha; 



30 For the male organs of the Coleoptera in gen- see L. Dufnur, Ann. d. Sc. Nat. VI. 1825, PI. VI 

 eral, see esptcially L. Du four, Ann. d. Sc. Nat. fig. 6. 



YI. 1825, p. 152, PI. IV .-IX. and I. 183i, p. 76, 37 Hammaticherus, Anthribus , Lixux and Do- 



Pl. III. IV. nncia liave two pairs of testicles ; Meloloiitha and 



31 With Harpalus, the two caeca are united into Prionus six, Trichius nine, and Cetonia twelve. 

 a single clew. Beside L. Dufour (loc. cit.), see Suckow, in fieu- 



■i2 Cybister, Scarites, and Clivina. have two sinser^s Zeitsch. II. Taf. XI. and Straus, Consid- 



testicles invested by a capsule. erat. &c. PI. VI. 



33 Each testicular fasciculus is composed of from 3S These torosities are even surrounded with a 

 three to seven follicles with jDe7-mesies, ffeieroce- capsule with Cylister ; see L. Dafour, A.Qn. i. 

 ruK, Anthreuus, Oedemera, He/ops, Diaperis, Sc. Nat. VI. 1825, PI. V. fig. 1. 



Tenebrio ; while with Blaps, Pimclia, Mylabris, 3'J With the Hydrophilidae, there is a vesicular 



Telephnrus, Hostrichus, the Elateri<Iae and Coc- dilatation at the lower extremity of the defereuj 



cinellidae, their number is much larger. canals ; but with Anthribus, and Lixus, it is situ 



34 There is a Tunica vaginalis with Clerus,Tri- ated at t> i opposite extremity. 

 ehddes, Mylabris, and wliich, with Galeruca, is 



even common to both ti-sticles. 



39* 



