241 
anatomy of the mole-cricket, 
largest, and which I suppose to be impregnated, are of a 
brownish yellow colour; they resist' a considerable degree 
of force before they burst, and the contents when pressed 
out melt as it were into a soft jelly, leaving a tough mem- 
brane which enveloped them. The smaller ova are of various 
sizes and of nearly a white colour, and of a much more 
slender and compressed form than those which I have sup- 
posed to be impregnated. This difference in the degree of 
maturation corresponds with a fact stated by Rosel, that the 
mole-cricket does not deposit all the eggs of the season at 
one time. In a few instances I found two or three ova which 
had entered the narrowest part of the duct and were very 
near the uterus ; and from the appearance of these, which 
may fairly be supposed to be, if not impregnated, at least 
in a state fit for impregnation, I have ventured to derive the 
character of the impregnated ovum. 
The sexual organs oj the male* I had dissected several male 
gryllotalpge before I was fortunate enough to meet with the 
sexual organs fully developed ; and while I had as yet met 
with only one animal bearing the character of full develope- 
ment, I was not certain whether I judged rightly of the 
natural state of those parts ; or whether their uncommon 
degree of enlargement were not the effect of disease the 
disproportion in size between the state in which they had 
hitherto occurred, and that to which I now allude is so enor- 
mous. However, subsequent dissections presenting the same 
phenomena, I have no scruple in considering them as indi- 
cating full developement. 
The testicles of the male are situated similarly to the 
• Vide fig. 14. 
