44 



the tibia. It was thought that they might be the same species which 

 Mr. Van Duzee has reported having taken in New York State in the 

 immature form in the autumn and which he thought might prove to be 

 Acliorotile albosignata, a European species. A character tending to 

 give one this opinion is that the nymphs have two median carina? on 

 the face. 



In the spring of 1903 this nymph was quite abundant on the campus 

 of Ohio State University. By caging some of them they transformed 

 to the adult stage, and it was proved that they were Liburnia cam- 

 pestris. In the final molt the two facial carina? of the nymph have 

 fused into one median one, forked at the vertex. I am inclined to 

 the opinion that this character of two median facial carina? will be 

 found to hold for the nymphs of the other species of Liburnia, when 

 they have been discovered. 



Nymphs of L. campestris were very abundant during the middle of 

 March, and by the last week of the month adults began to appear in 

 places where nymphs had been taken in abundance. April 11 I wit- 

 nessed the transformation of three specimens from nymph to adult; 

 at this time the adults were becoming quite abundant, increasing 

 from that time on while the nymphs were decreasing, till by the last 

 week in April none were taken. 



May 1 a breeding jar was prepared with growing blue grass, and a 

 dozen each of males and females placed therein. Egg deposition was 

 never observed, but it must have occurred soon, for larvae were 

 noticed in abundance May 17, or in about two weeks. Examinations 

 of the grass in the jar showed the manner in which eggs were depos- 

 ited. The sheath of a grass leaf is punctured at one angle of the 

 stem, and eggs are placed inside the substance of the leaf sheath, 

 about four to eight in a row, up and down. Often several of these 

 groups occur above one another in the same leaf sheath. The eggs 

 slant downward from the place of insertion. The head end of the 

 larva is uppermost, so that it may readily crawl out when hatched. 

 After learning the place of deposition of eggs, search was made in the 

 field and many grass stems found containing eggs, which were in all 

 cases in the leaf sheath, as above described, and at a distance of 2 to 

 4 inches from the ground. Not a large number of eggs are dej)Osited 

 by each individual. By dissecting and counting eggs of several 

 females, the number contained varied from 17 to 30. The period of 

 egg-deposition undoubtedly extends throughout May, as the time of 

 maturing of the hibernating nymphs extended over a period of about 

 four Aveeks, beginning the latter part of March. 



The young nymphs in the breeding jar reached their full growth in 

 about six weeks, or the last week in June. At this time the observa- 

 tions were interrupted, so that the exact length of time to reach matu- 

 rity was not ascertained, but freshly transformed adults were taken 

 quite plentifully the first week in July. All through July and August 



