Vol. XXvii] ENTOMOLOGICAL NEWS. 8l 



THE EGGS. 



The eggs of this species are distinctly compressed and oval 

 in form, with one side strongly arcuate, and the other much 

 more flattened. They are rather large for the size of the in- 

 sect, as they are slightly more than five millimeters in length, 

 and average two and a half millimeters across the middle. 

 When the young hatch they make a vertical rent at the larger 

 pole of the egg, the vertical slit turning transversely part way 

 across on one side near the middle of the egg. About thirty- 

 two eggs may be laid by a single female. 



Contrasting with the habit of laying the eggs in the ground 

 by Amblycorypha, we find in the genus Scudderia that mem- 

 bers lay their eggs under the epidermis of a green leaf. The 

 insect seizes the leaf with her legs and using her ovipositor as 

 a lance at the edge, she slits a pocket receptacle for holding 

 each egg. The leaf containing the eggs usually falls to the 

 ground later, and there remains through the winter. In Micro- 

 centrum, the eggs are fastened to a twig in two rows, the fe- 

 male preparing the place where they are to be deposited by 

 roughening the surface with her jaws. In the process of lay- 

 ing her eggs, one egg is laid under the other in forming the 

 rows by the use of the saw-like end of the ovipositor. 



In the late afternoon of September 27, 1914, I heard a 

 male pink katy-did stridulating. In the sounds made by this 

 insect and two others I heard, I could not detect any differ- 

 ences in the notes from those made by the ordinary green 

 form. Stridulation was indulged in more vigorously on hot 



nights. 



CONCLUSIONS. 



i. I have shown that the pink katy-did crosses freely with 

 the normal green form. 



2. A virgin pink female was mated with a normal green 

 male. Some of the hybrid progeny Fr which hatched two 

 years and others three years later, respectively, showed in the 

 total progeny two types as follows : Nine bearing the pink 

 coloration like the mother, and four green like the male- par- 

 ent. The sexes were about evenly divided in both the pink 



