§ 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 or 

 round follicles.*-**' With Myrmeleon, and Hemerobius, 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 Pyrochro'idae, these organs arc 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 

 defer entiaS''^'^ 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 sejnmalis.^^'^'^ 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. In very many species this gland- 



27 L. Diifour, loc. cit. fig. 172. 35 See Swammerdamm, Bib. der Nat. Taf. 



28 Siatis and Pkry^anea. XXII. fig. 5 ; Sackow, in Heusing-er''s Zeitsch. 



29 See L. Diifour, loc. cit. PI. XII. fig. 172-210 II. Xaf. X. fig. 1, 2 {Hi/dropliilas) ; L. Dufour, 

 (Panorpa, Myrmeleon, Sia/is, Pkry^anea), and Arm. d. Sc. Nat. XIII. 18iO, PI. VI. A. fig. 18 

 Suc/coiv, in Heusingcr''s Zeitsch. II. Taf. XVI. {Pyrochroa). 



fig. 15 {Sialis). 3G Ttie two testicles are multiramose with Silpha; 



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

 eral, see espLCially L. Dufour, Ann. d. Sc. Nat. fig. 6. 



VI. 1825, p. 152, PI. IV.-IX. and I. 1834, p. 76, ■^'i Hammaticherus, Anthribus, Lixus and Do- 



Pl. III. IV. nacia have two pairs of testicles ; Meiolontha and 



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



a single clew. Beside L. Dufour (loc. cit.), see Sue/cow, in Heu- 



32 Cybister, Scarites, and Clivina, have two singer'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 Z)er7nes<fs, /feieroce- capsule with Cybister; see L. Dufour, Aon. il. 

 rus, Ant/irenus, Oedemera, Helops, Diaperis, Sc. Nat. VI. 1825, PI. V. fig. 1. 



Tenebrio ; while with Blaps, Pimelia, MyLabris, 39 With the Hydrophilidae, there is a vesicular 



Telephnrus, Bostrichus, the Elateridae and Coc- dilatation at the lower extremity of the deferent 



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 the opposite extremity. 

 rlindes, My/abris, and which, with Galeruca, is 



ive'.i cniimon f.) both testicles. 



39^ 



