186 ANATOMY. 



III. Long tubular ovaries, which contain many egg germs, are col- 

 lected together at one part of the common duct. These tubes are either 

 entirely free, and distinctly separated from each other throughout their 

 whole course, or else united together by a loose cellular tissue (for ex- 

 ample, in Harpalus ruficornis). 



1. OVARIUM SPIRALE (PI. XXVII. f. 10). There is but one egg- 

 tube to each ovarium, but which is very long, and it is twisted spirally 

 from its apex to its base ; a rare form, which has been observed only in 

 Sarcophaga carnaria and some other kinds of flies. 



2. OVARIA FURCATA (PI. XXVII. f. 7- Ovaria saccota, Miill.). 

 There are but two short ovaria, containing indistinct egg germs, and 

 which unite with the common duct by means of a fork; at the point 

 of union there is a bag (uterus) in which the egg germs pass through 

 their changes until the pupa state (Diptera pupipara *). In Polistes 

 also there are but two egg-tubes, each of which however contains 

 several eggs. 



3. OVARIA DIGITATA (PL XXVII. f. 8 and 9). A few, from 

 THREE to FIVE, such egg-tubes hang at one spot of the common duct. 

 Many Lepidoptera (for example, Liparis Mori, with FOUR tubes, each 

 of which contains about sixty eggs), particularly the smaller ones (for 

 example, Tinea, likewise with FOUR tubes, each of which contains 

 about twenty-five eggs; and Ptcrophorus, with THREE tubes, each 

 containing about twelve eggs) ; and the Hymenoptera, (for example, 

 Chrysis, with THREE tubes, each with three eggs; the same in Xylo- 

 copa ; in Anthidium, also THREE tubes, each with about eight eggs). 

 In Nepa, Pediculus, and Psocus there are FIVE tubes, each in the 

 latter genera containing five eggs. 



4. OVARIA VERTICILLATA (PI. XXVII. f. 11). Many very long 

 tubes originate at one spot, upon the very short common egg duct. 

 They run upwards in a long filiform point. 



Such ovaria are found in the majority of female insects, namely, in 

 most Lepidoptera, many Hymenoptera, and almost all Coleoplera. 

 Miiller's ovaria conjuncta are but a trifling variety of this form, the 

 superior filament hanging more closely together, and forming an inter- 

 twisted cord. The fertility of the species regulates the number of the 

 egg-tubes and their turgidity. Oryctes nasicornis, Melolontha, Cetonia, 



* Leon Dufour in the Annales des Scienr. Nat. torn. vi. p. 299, &c. According to him 

 the ovaria contain merely a whitish mass, but no distinct egg germs. 



