172 TETTIGlDyE OF NORTH AMERICA 



has taken place at seventeen minutes of eleven, or a little more than half 

 an hour, their bodies being protectively colored like the ground. This 

 brood was not complete until twelve o'clock, when another tardy specimen 

 was born, increasing the number to thirteen. May 7, i8g8. 



SUMMARY OF HOW THE EGGS ARE LAID IN TETTIX ORNA- 

 TUS — PROTECTIVE RESEMBLANCE IN THE EGGS, SIMU- 

 LATING LICHENS OR MOSS. 



The process of egg-laying, summed up in brief, is as follows: The female 

 selects a desirable spot and, curving the abdomen under the body, she pro- 

 ceeds to drill a hole by repeated spreading and shutting the blades of her 

 ovipositor. When the hole is of sufficient depth she lays one egg at a time, 

 to which she affixes a transparent glutinous substance so they will adhere. 

 I have seen this on freshly laid eggs.* Then as the full complement 

 is deposited, without moving her body she removes the abdomen having 

 the ovipositor attached, and with her hind legs commences to cover up the 

 hole; if the eggs are in a soil on wliich there are loose panicles with which 

 she may cover her eggs, using the tarsi to handle the fragments. On the 

 other hand , when she places her eggs in a carpet of moss or lichens she does 

 not attempt to cover them over. This would indicate she realized that 

 the pointed extremities so much resembled the lichens that there need be 

 no fear for their future. The depth to which she buries her eggs varies; 

 sometimes they can be seen in lichens, but in other soils they are laid about 

 four or five millimeters deep. 



I was impressed while making an examination of the eggs in their 

 natural environment with the evident object of the tail-like jirojection at the 

 end of each egg. Snugly laid as they are with their sides together in a cluster, 

 these little points stick up, presenting a resemblance to the pointed lichens. 

 The pointed ends offer a safe contrivance against the eggs being eaten by 

 insect enemies. May 31, iSq8. 



E.XPULSION OF F^CES BY MEANS OF THE HINIJ TIBIA. 



I have noticed in Tettix a peculiar habit of aiding the expulsion of 



fiscal matter by a quick backward kick of the hind tibia. The fffical mass, 



consisting of an oval body, is sent away from the body with some force. 

 May 7, 1898. 



OBSERVATION ON THE HATCHING OF TETTI.X ORNATUS— 

 TIME ELEMENT PERFECTLY MAINTAINED IN DEVEL- 

 OPMENT OF EMBRYOS — HATCHING SIMULTANEOUSLY 

 AFTER TWENTY-THREE DAYS — HANDLING THE YOUNG 

 IN TRANSFERRING TO NEW VIVARIUM. 



At 2:30 p. m., while looking in the vivarium, a new brood of Tettix 

 emerged. In fifteen minutes they were scattered over the ground. They 

 presented a pale, translucent, whitish color, with dark eyes, and the brood 



*See Plate XI.. Fig. 2a. 



