FEMALE ORGANS OF GENERATION. 101 



narrow tubular pedicle into the uterus ; in Harpalus and Spondyla, on 

 the contrary, it is a round bladder, which has a very long, twisted, fine 

 duct, and which in Spondyla contains a hard horny interior ; in Ptero- 

 phorus the vessel distends before its orifice into an ovate bladder ; and 

 in Lucanus (PI. XXVIII. f. 1. b, b) ^there are two such bladders, 

 which unite by means of tivo short ducts into a common one, and 

 originate from very fine, short, twisted vessels, by their distension. 

 The form of these organs, lastly, is very peculiar in Elater murinus, in 

 which, according to Leon Dufour, they are vessels successively furcat- 

 ing, which at the base of each fork distend into a triangular bag. The 

 symmetrical appendages in Hippobosca resemble these, but the bag- 

 shaped distensions are wanting. 



Where the duct has two symmetrical appendages, as in Lepisma 

 (PI. XXVIII. f. 3.), Musca, and Pediculus they are always gluten 

 depositories; in Lepisma they are large and bag-shaped, and upon 

 the upper surface here and there constricted ; in Musca longer and 

 clavate ; but in Pediculus, on the contrary, they are two short blind 

 bags, provided with accessory points. 



We find three appendages in Gryllotalpa, Calosoma, and Stra- 

 tiomys. In the first instances two of them are equal, namely, 

 clavate or vesicular gluten vessels, which empty themselves into the 

 duct by means of narrow canals ; the third, on the contrary, is the 

 bag-shaped spermatheca, which in Gryllotalpa has another superior, 

 long, vascular appendage. In Siratiomys Swammerdamm * found 

 three long, vascular, gluten ducts, which originated from round gland- 

 ular bodies. 



Four appendages are seen in some Lepidoptera, for example, Pontia 

 Brassicce. The most anterior one is a simple, tolerably long, twisted 

 vessel, which in others ( Gastrophaga Pini, see further below) consists of 

 two furcate branches ; the second is the spermatheca ; the following are 

 again long twisted vessels, which unite in a short duct after they have 

 previously distended in two oval bladders. In Cicada, Latr. (Tetti- 

 gonia, Fab.), in which there are also four appendages, two symmetrical 

 vessels are found in front of the spermatheca, but the vessel behind it 

 is simple but much longer than the two first. 



Five appendages, lastly, are found in several, particularly the Nociuce. 

 A bladder-shaped, one-sided, sometimes long and clavate, or distended 



* Bib. Natura, PL XLII. f. 8. 



