1914] A Study of Dryophanta Erinacet. 23 
divisa, but also in many species of the gall-forming Cynipide. 
In the following table it will be seen that in Dryophanta erinacei 
the oenocytes show no remarkable increase in size, and that 
they reach their maximum long after the Malpighian vessels 
have passed their period of greatest activity. 
TABLE, LL: 
D. ERINACEI. LENGTH OENOCYTES NUCLEI 
pupa 56u.x64u. 26u.x32u - 
64u.x64u. 32u.x382u- 
48u.x48u. 24u,.x24y-. 
larva 246mm. 80u.x120pu. 32u.x40p-. 
64u.x 72u. 32u.xd2u. 
48u.x 64u. 32u.x32u. 
s 244mm. 64u.x 56u. 32u.x32u - 
56u.x 56u. 24u.x24u- 
56u.x 48u. Ay .x24y- 
= 2mm. (2.x 76m. 32u.x32p. 
56u.x 56u. 24u.x2Ap. 
48u.x 48y. 24u.x24u. 
¢ 134mm A8u.x 48u. 32u.xd2u. 
40u.x 40u. 24y.x24y. 
‘ 144mm. 56u.x 56u. 28u.x28y. 
48u.x 48u. 24u.x24p. 
“i 14mm. 48u.x 52u. 24u.x24y-. 
48u.x 48u. 24u.x24y. 
40u.x 40u. 24u.x24u. 
= Ere, 40u.x 48u. 24u.x24u. 
40u.x 40u. 24u.x24y. 
s 500u. 40u.x 40u. 24u.x24u. 
Eurytoma pupa 88u.x 88u. 40u. x48. 
90u.x 96u. 48u.x48p. 
80u.x S8Ou. 40u.x40p. 
Eurytoma larva 134mm. 88u.x 80Ou. 40u.x36u. 
64u.x 64u. A40u. x40u. 
Synergus erinacei larva 134mm. 88u.x 72u. 32u.x32u. 
56u.x 64u. 24u.x24y. 
Internal parasite, larva 750y. 48u.x 42u. 24u.x24y. 
40u.x 40u. 24u.x24y. 
Nematus pomum larva 56u.x 40u. 24u.x24y. 
40u.x 44u. 24u.x24u. 
Trypeta solidaginis 
larva 72u.x 80u. 32u.x32u. 
60u.x 62y. 32u.xd2y. 
In Table III, the measurements given are constant in a 
large number of individuals for each species, and from%the 
study of these it will be seen: 
1. In Dryophanta erinacei the oenocytes reach their 
maximum size when the- larva measures 245mm. Fig. 93, 
Pl. XI shows such an oenocyte. 
2. No oenocyte shows a threefold increase during the 
larval development. The average of the largest oenocytes was 
64u.x40u., nucleus 32u. while the smailest was 40y.x40u. 
nucleus 24u. 
