408 
Indiana University Studies 
than in the agamic form. It is always placed in the fibro-vas- 
cular bundles, and at an angle of about 80° to the axis of the 
leaf. The egg differs from that of the agamic form only in 
the elongate portion being shorter. 
“The larva is characteristic of the Cynipidae, having a 
slightly depressed head, fine needle-like mandibles, broad 
thorax, and reflexed pointed abdomen. During development 
the abdomen does not become as enlarged as in the agamic 
form. The thorax also continues prominent throughout all 
larval stages, which is not the case with the agamic 
form. . . . 
“In the open the adults did not emerge until the twenty-ninth 
of May, and continued to oviposit from that time until the 
fifth of June. Oviposition here was as observed in the labora- 
tory, the time occupied corresponding exactly to that already 
noted.” 
In this 1914 paper, Triggerson includes a small photograph 
of the female of this form, figures the young galls in the bud 
scales, details the mouth parts, wings, and antennae — the lat- 
ter showing sensory pits similar to those of the agamic female 
— and figures the egg of this insect. He also shows a longi- 
tudinal section thru a larva including a portion of the Mal- 
pighian tubule. 
Wieman (1915) has studied the spermatogenesis of the male 
of the bisexual erinacei. He admits his conclusions as some- 
what uncertain and perhaps open to question because of diffi- 
culty in seriation of his sections, and more especially fragmen- 
tary because the maturation stages of the eggs of this genera- 
tion and of the agamic female were not studied. In the male 
he found “but one true maturation division, namely that of the 
second spermatocyte. The first spermatocyte division is indi- 
cated by the pinching off of a small quantity of chromatin- 
free cytoplasm which forms the so-called polar body.” In the 
second division “it would seem that each chromosome is di- 
vided quantitatively by a longitudinal splitting; although it 
must be remembered that attempts at verifying this conclu- 
sion by studying the constituents of the daughter groups 
[were] not satisfactory owing to the tangled condition of the 
chromosomes.” Counts in the metaphase seemed to show 12 
chromosomes as, presumably, the haploid number. Counts of 
somatic tissues of the male, although not conclusive, also 
