454 



THE INSECTA. 



§350. 



Receptacula seminis is nearly always simple, round, or ovoid, and necked, 

 and is continuous into a usually short, seminal duct.*-'" A GlandiiJa appen- 

 dicularis is never absent, and consists, usually, of a bifurcate tube, which 

 opens into the Ductus seminalis, and only rarely into i\\Q Capsida seminalis 

 itself/-'' 



With the Tcnthredinidae this apparatus is, moreover, formed after a dif- 

 ferent type ; the seminal vesicle is a simple deverticulum of the vagina, and 

 more or less distinct from it, beside, it is deficient in the accessory gland.'-*' 

 The copulatory pouch is absent with all the Hymenoptera, as are also the 

 Glandidae sebaceae with those females which have a sting and a poison- 

 gland ; but these sebaceous glands are highly developed with those species 

 having an ovipositor, into which last they open, and probably serve some 

 purpose connected with the oviposition, partly as sebaceous, and partly as 

 excitatory organs. This secretory apparatus consists of a simple or a 

 double ramose gland, whose excretory duct receives the neck of a pyriform 

 receptacle, or, sometimes, is itself dilated into a vesicular reservoir. '-"•*> 



With the Orthoptera, the two ovaries are nearly always composed of nu- 

 merous, multilocular tubes, which usually open in a single row upon the inter- 

 nal or external side of two large and sometimes very long ovaries.'** The 

 seminal receptacle often consists of a simple longer or shorter pedunculated 

 vesicle, whose closed extremity is dilated into a pyriform vesicle with the 

 Psocidae, Forficulidae, Locustidae, Phasmidae and Mantidae.'"'' A similar 

 Capsula seminis is often found with the Acrididae on one of the sides of the 

 Ductus seminalis and removed from its extremity. *''-* Most of the Blat- 



2<; For the Receptaculum seminis see Siebold, 

 Observ. quaed. Eiitcim. loc. cit. p. 6, and in Ger- 

 mar^s Zeitsch. IV. p. 362, Taf. II. With those 

 females wlaich, at short intervals, lay very many 

 eggs, the seminal receptacle is very large ; see 

 Swammerdamm, Bib. der Nat. Taf. XIX. fig. 3, 

 t. u. u., where the Receptaculum seminis of a 

 honey-bee is very well represented.* 



-■7 The Glandula appendicularis is simple and 

 inserted on the Ductus seminalis with the Ptero- 

 malini and Cynipidae ; it is double, and opens 

 lirectly into the Capsula seminis, with Fespa 

 •rabo and Tiphia femorata. 



28 The seminal receptacle is double, exceptionally, 

 vith Lyda. 



89 This glandular apparatus is simple and has a 

 ateral pyriform reservoir with various Ichneumon- 

 idae ; see L. Dufour, Kecheroh. PI. X. fig. 137- 

 142 (Pimpla and Bracon). This naturalist calls 

 this apparatus Glande sirifique, as distinguishing 

 It from the Glande sebifique. With Sirex, I have 

 observed the excretory duct of this single and niul- 

 tiramose gland dilated into a large reservoir. With 

 the Tcnthredinidae, it is also ramose, but double as 

 well as its vesicular reservoir ; see L. Dufour, ]oc. 

 cit. PI. X. fig. 155-157 (Tentliredo and Cimbex). 



30 With the Locustidae, Acrididae, Mantidae 

 and Libellulidae, the ovarian tubes are inserted 

 upon the internal side, and with the Phasmidae 

 and Ephemeridae, on the outer side of the two ovi- 

 ducts. Forjicula gigantea has, moreover, only 

 five internal multilocular tubes, while with Forji- 

 cula auricularis, the very long oviducts have on 

 all sides a multitude of unilocular tubes. With 

 Mantis, the ovarian tubes are unilateral, but 

 united together in several bundles. With Oedi- 

 poda cerulescens and Truxalis nasuta, the two 



long, flexuous, caecal oviducts, have tubes only at 

 their lower extremity. The oviducts of Perla bi- 

 caudata are still more remarkable ; they are very 

 long, flexuous, and have ovarian tubes only on one 

 side of their upper extremity, and anastomose in a 

 loop-like manner. For all these differences, see L. 

 Dufour, Recherch. sur les Orthopt. &c. PI. II.- 

 V. and PI. XI. fig. 165, PI. XIII. fig. 206, and 

 in the Ann. d. Sc. Nat. XIII. 1S28, PI. XXI. XXII. 

 (For/frw/a). 



31 With Forjicula, and Acheta, the seminal re- 

 ce])taele has a long and flexuous peduncle, which, 

 with the Psocidae, and Locustidae, is shorter. That 

 of Psocus pulsatorius contains several long-pe- 

 dunculated, glandular bodies {Nitzsch in Ger- 

 mar's Magaz. IV. p. 281, Taf. II. fig. 3-5), which 

 I formerly regarded as Capsulae seminales 

 (^Muller's Arch. 1837, p. 410), but which are prob- 

 ably spermatophores. With Perla, the seminal 

 receptacle is a simple caecum, twisted like a ram's 

 horn, and the base of which supports several short 

 glandular follicles (Glandulae appendiculares ?). 

 For the seminal receptacle of the Orthoptera cited 

 in the text, see especially Roesel, Insektenb. Th. 

 II. Heuschrecken-und Grillen Sammlung. Taf. IX. 

 fig. 3, k. {Decticus) ; L. Dufour, Recherch. sur 

 les Orthopt. PI. III. fig. 31, PI. IV. fig. 43 {Acheta 

 and Mantis) ; and Siebold, Nov. Act. Nat. Cur. 

 XXI. part I. p. 254, Tab. XIV. fig. 1, c. (Lo- 

 custa). 



32 See Hegetschweiler, De insect, genitalibus 

 dissert., fig. VII. f. e.; and Siebold, in Muller\s 

 Arch. 1837, p. 409, Taf. XX. fig. 3 (Gryllus). 

 The Ductus seminalis is usually very long and 

 intertwisted, as, for example, with Gryllus, Trux- 

 alis, &c. 



* [ ^ 350, note 26.] See also Longstreth (Proc. 

 Acad. Sc. Philad. 1852, VI. p. 49) for some observa- 



tions on the impregnation of the common honey-bee, 

 as due to a Receptaculum seminis. — Ed. 



