ORGANS OE REPRODUCTION. 



19 



nutriment chambers (Nahrkammern) are always present. In the 

 Adephaga there are several such chambers alternating with the 

 egg-chambers, and the ovaries in such cases are called meroistic ; 

 but in the other Coleoptera, so far as is known, the terminal 



Fig. 11. — Reproductive organs of the female of Hi/drobius fasapes. ov, ovary 

 (the left ovary is cut off in the figure); he, oviduct, enlarged in front ; 

 dr, accessory glands ; bt, copulatory pouch ; st, seminal pouch or sperma- 

 theoa; a, accessory gland of the same. (After Grraber.) 



chamber is developed into a large nutriment chamber, and there are 

 no others ; the ovaries in this case are said to be holoistic. In 

 certain orders of insects, there are, in many instances, no nutri- 

 ment chambers at all ; such is the case with various Hymenoptera. 



'Fig. 12. — Reproductive organs of the male of Staphylinus erythropterus. 

 ho, testicle (the covering envelope or capsule is shown at a) ; si, vas 

 deferens ; ag, ductus ejaculatorius ; dr, accessory glands ; nu, aedeagus ; 

 m, muscles. (After Graber.) 



These facts were pointed oat by Korschelt and Heider. 

 Ganglbauer and others are of the opinion that the ovaries with the 

 single and well developed terminal egg-chamber represent a higher 



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