REPORT OF THE STATE ENTOMOLOGIST I9IO IO3 



there was a distinct constriction, almost a division, the tissues 

 adjacent thereto being markedl}^ larger and darker, while at the 

 posterior extremity there was a distinct lobe occupying about two- 

 thirds the width of the embryo. February 8th there was a shrink- 

 ing from both extremities of the amniotic sac, and other changes 

 which are not described in detail, since they appeared to be pre- 

 liminary to disintegration the next day, though the mother larva 

 continued alive until the 15th. 



An active, moderate-sized, white larva was isolated February 

 27th and its granular ovaries were seen partially to divide into 

 irregular lobes, the one at the posterior extremity of the left devel- 

 oping into an ovum larger than the remainder of the ovary. The 

 anterior third of the ovum was filled with darker, granular matter, 

 while the remainder consisted of clear plasm containing about 

 seven large, nucleated cells. This ovum increased in size until it 

 was larger than the remainder of the ovary in which it originated, 

 gradually separating therefrom by fission and shortly developing 

 into a small embryo in the morula stage with distinct polar cells 

 much as is illustrated on plate 30, figures 2 and 3. 



Bibliography of pedogenesis. Reference to the literature 

 shows that investigations of these forms have been confined to 

 Europeans, only minor notices being given by Americans. The 

 following citations include most of the important literature and 

 practically everything that we have been able to find in English. 



1862 Wagner, Nic. Ueber spontane Fortpflanzung der Larven bei den 

 Ins'ekten (in Russian) Kasan Fol. 50, p. 72, 5 plates. 

 1864 Meinert, F. R. Miastor metraloas. Naturhist. Tidsskrift, p. 37-43- 



1864 Pagenstecher, H. A. Die ungeschlechtliche Vermehrung der Fliegen- 

 larven, Zeitschr. f. wiss. Zool. 14:400-416, plate 39, 40. 



1865 Baer, K. v. Ueber Prof. Nic. Wagner's Entdeckung von Larven, 

 die sich fortpflanzen, etc. L^Acad. imp. des sciences de St Petersbourg. 

 Bui. 9, p. 64-137, plate I. 



1865 Hanin, M. Neue Beobachtungen ueber die Fortpflanzung der 

 viviparen Dipterenlarven. Zeitschr. f. wiss. Zool. 15 1375-90, plate 2.y. 



1865 Leuckart, Rud. Die ungeschlechtliche Fortpflanzung der Cecido- 

 myidenlarveni. Archiv. fiir Naturg. 31st year, 1:286-303, plate 12; Ann. & 

 Mag. Nat. Hist. Sen 3, 17:161-73, plate (a translation by W. S. Dallas). 



1865 Mecznikoff, Cand. Ueber die Entwickelung der Cecidomyiden- 

 larven aus dem Pseudovum. Archiv. f. Naturgesch. 31st year, i :304-io. 



1865 Meinert, F. R. Om Larvespirernes Oprindelse i Miastorlarven. 

 Naturhist. Tidsskrift, p. 83-86. 



1865 Siebold, C. Th. v. Zeitschr. f. wiss. Zool. 15:115-16. 



1865 Wagner, Nic. Ueber die viviparen GallmiVckenlarven. Zeitschr. 

 f. wiss. Zool. 15:106-15, plate 8. 



