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Annals Entomological Society of America _[Vol. VII, 
gradually degenerate. Their size, in comparison with that of 
the larva, is remiarkable. From some of the larva investigated 
he gives the following: 
LENGTH OENOCYTES NUCLEI 
Larva of Biohriza terminalis A470u. 20u. 
« “  Andricus ostreus 375u. 23u. 
«  « ~ Andricus fecundatrix 450u. 25p. 
“« «  Dryophanta divisa (end of June) 460y. 20-67. 25p. 
“« “  Dryophanta divisa (17th July) 600u. 100u 50u 
« «  Dryophanta divisa (end of July) 78dy. 146-150z. 59u 
From this, the author points out, first the unusual size of 
the oenocytes as compared with that of the larva, and second 
the three-fold increase in size of the oenocytes within one 
month. He also gives measurements of oenocytes found in the 
inquiline inhabiting the gall formed by Andricus globuli, Vespa 
crabro, Nematus vallisnierii, Hormomyis fagi, and Aphis mali. 
With one exception, the larva are all larger than those of the 
gall wasps, and their oenocytes smaller. Now by a comparison 
of the size of the oenocytes with that of the larva, and secondly 
these oenocytes and larva with those of the gall-forming Cyni- 
pide he endeavors to establish his theory. 
In discussing the first point the author says “‘In no other 
instance have such large oenocytes been found in so small a 
larva.’’ Throughout his treatment of the oenocytes this fact 
is kept continually in the foreground. Mention is made of 
Kochevnikov’s discovery of a remarkable oenocyte 176y. in a 
pupa of a honey-bee 15mm.—l6mm. in length, but the author 
points out that, since the oenocytes in Dryophanta divisa are 
so large as compared with the larva, and the latter so small . 
as compared with the pupa of the honey-bee, (that is, 785. 
as compared with 16mm.), great importance must be attached 
to the oenocytes of the gall wasps. 
Now does the size of the cell in comparison with that of the 
body determine its importance? It is very doubtful if such 
evidence can be used to support his conjecture regarding the 
function of the oenocytes. 
In the second place we must discuss the three-fold increase 
of the oenocytes. This appears to be tabulated from one set 
of larva in a single species, but is not shown to be constant 
throughout that species. Now before a general conclusion can 
be drawn, this triple increase would have to be shown to be 
constant not only for a large number of larva of Dryophanta 
