Sexual and Parthenogenetic Forms 325 
or very few were produced. Some females gave birth only to 
parthenogenetic young, others first to parthenogenetic and after- 
ward to a mixture of parthenogenetic and sexual young. The 
following records give the kind and the number of offspring for 
ten isolated females. 
The parthenogenetic females are indicated by P, the males 
by M, and the sexual females by F. 
First female, Aug. 21 to Sept 5. 
3P, 3P, 2P, 4P, 5P, 3P, 4P, 6P, 3P, 3P, 2P, 3P, 3P,1P,1P. Total, 46P. 
Second female, Aug. 21 to 25. 
13F 3P, aM 2P, 3P. Total, 14P, 3M, and 2F. 
? ? 
Third female, Aug. 23 to 28. 
2F, 2F, 3F, 6F, 3F, 2F, 1F. Total, oF. 
Fourth female, Aug. 26 to Sept. 20. 
if M 
6P, sP, sP, 4P, 3F, 2F, 0, ie so 2 2M, 4F, { th. SP, 3F, 4F, oF, 
0, 0, 0, 2F, 1F, 1F, 2F, 0, 0, 0. Total, 20P, 6M, 44F. 
Fifth female, Aug. 3 to Sept. er 
(eM M M 
a {Se (ie, (2h (oe 
4F, IF, 6F, 4F. Total, 11M, 56F. 
Sixth female, Aug. 31 to Sept. 20. 
ea 5F, { _ ea \on {ie 3E, 7F, 2F, 4F, sF, 3F, 6F, rF, 
2F, 1F, 5F, 0, 0, 1F, 1F, 0,0. Total, 14M, 56F. 
Seventh female, Ria 16 to ee ca 
aF, 0, 2F, ae 7 {2M [2h SE, ak, aF, SF, aF, 4F, aF, 4F, sF. 
Total, oMt Oa 
Eighth female, Sept. 16 to Oct. 7. 5 aR EEE 
2M f 
{ a 1M, a ay 2F, 4M, ea es ie IF, 2F, 2F, 3F, 3F, 
o, 3F, 2F, 1F, 4F, 0, 2F, 2F, 0, 1F, 3F, 0, oF, IF, 2F, 0, 1F, 1F. 
Total, 12M, 55F. 
Ninth female, Sept. 16 to Sept.’ 26. 
4F, 1M, «F, {3m IM, 0, 3F, 0, 4F, 4F, 1F. Total, 5M, 18F. 
3F, 6F, 3F, 1F, 4F, 2F, 1F, 
Tenth female, Sept. 16 to Oct. 4. 
3M, i {ane IF, 4F, 3F, 3F, xF, 3F, aF, 2F, 1F, 2F, 2F, 1F, 0, 
o, IF, 1F. Total, 6M, 32F. 
