88 ENTOMOLOGICAL SOCIETY 



ponds. Mr. Schwarz further asked whether any one had ever 

 seen one of these bugs rise again after falling to the pavement, 

 and whether any one had noticed them in the morning in the same 

 numbers in which they occurred at night. In other words, what 

 becomes of those individuals which fall to the pavement? Dr. 

 Gill said he had noticed the insects most abundant at the lights 

 nearest the fish' ponds and gradually diminishing about lights 

 further away. Mr. Schwarz said that in his experience electric 

 lights are much less attractive to insects now than when they 

 were first introduced. He believes that the insects are gradually 

 becoming accustomed to the lights. Prof. Riley said that this 

 statement, if true, is of extreme interest, as it involves the ques 

 tion of the heredity of the knowledge that it is injurious to the 

 species to fly to the light. In reference to the flight, it was ex 

 traordinary only because of the size of the species, since all the 

 Heteroptera use their hemelytra in flight. 



Prof. Riley also read the following paper : 



THE EGGS OF CERESA BUBALUS Fab. AND THOSE OF C. 

 TAURINA Fitch. 



BY C. V. RILEY. 



In the fifth report on the insects of Missouri, page 121, I have 

 described and figured the eggs and egg-punctures of what was 

 then considered to be the Buffalo Tree-hopper, Ceresa bubahis 

 Fab. The egg-punctures there described consisted of a row of 

 more or less straight, slightly raised slits in the bark, in each of 

 which is an oval, dark-colored egg. I described and figured 

 various stages of the insect which was reared from these eggs, 

 and which was determined from the only bred and somewhat 

 undeveloped individual as belonging to this species. Of late years 

 the eggs of this species have been described and referred to by 

 several Western writers, especially by our fellow-member, Mr. 

 Marlatt, who published a full and illustrated account of them as 

 observed by him in Kansas, and calls attention to the error in 

 my own account above referred to (Trans. Kans. Ac. Sc., Vol. 

 x, pp. 84-5, 1885-6). The eggs and egg-punctures as there 

 figured are quite different from those which I illustrated and 

 described, and agree with others which I have been familiar with 

 for many years but never reared. An explanation of this dis 

 crepancy is, therefore, very desirable. 



Careful comparison of my bred material with the material in 



