1915] Turner: Breeding Habits of Ceuthophilus latens 
39 
usual conditions. Lights of low intensity, slight jars, and air 
currents induced no response. Strong stimuli, however, caused 
them to react in the usual way during the movements preliminary 
to copulation. While in the act of copulation, a 60 W Tungsten 
lamp held four inches from the pair produced no response and the 
full force of the breath blown upon them from the distance of a 
foot likewise caused no reaction. 
Certain mutilations did not have the effect of reducing sexual 
excitement when once it was aroused. A previously excited male 
with antennae and palps removed and with only the middle and 
forelegs remaining still attempted to place himself in a position 
to copulate. 
Fig. 5. Position of Female during Oviposition. 
IV. OVIPOSITION 
Egg-laying was observed in only four females. In no case 
was the beginning of the operation seen; but they were disturbed 
frequently standing in a shallow pit with the posterior end of the 
abdomen buried in the sand at a sharp angle to the long axis of 
the body. 
When these pits were searched after being left by the animal 
from two to five eggs were found in each place. The eggs were 
2.3 mm. in length, oval, semitranslucent and soft at first but 
became hard-shelled and white after a short exposure to the air. 
It was impossible to determine the total number of eggs laid 
by one female, but twenty-eight mature eggs were dissected from 
the ovarian tubules of one individual and other eggs were present 
in the tubules in various stages of growth. Two males were 
