152 The University Science Bulletin. 



to be teeming with nematodes tliat were intent upon consuming 

 the fly carcasses supplied as food for the bugs: No careful examina- 

 tion was made of this jar until July 1, when four white eggs were 

 found on top of the cork, placed there in an endeavor, apparently, 

 to keep them out of the wet, soggy sand. I then supplied dry sand 

 to reduce the moisture, and on July 6 found eggs in tlie sand; 

 observed mating on that date also. July 12 two nymphs hatched. 

 July 20, there were several active first-instar nymphs. July 24, 

 removed 18 dead first-instar forms and observed nine live ones. 

 There were several eggs yet to hatch and some fresh eggs. July 27, 

 removed two second-instar forms and took out 18 dead first-instar 

 bugs. Seven live ones were observed at this time. July 30, observed 

 a couple hatch and counted 10 active first-instar nymphs; also re- 

 moved 7 dead ones. On August 1 there were nine live first-stage 

 forms; removed 2 dead ones. August 2, counted 11 live first-stage 

 bugs and removed 6 dead ones. On the 3d removed 2 dead ones. On 

 the 4th there were 3 newly hatched bugs, and I removed 5 dead 

 ones. On August 5 one first-instar bug was observed feeding upon 

 another. August 7 there were at least 18 nymphs, three of them 

 white, denoting recent hatching. August 8, 7 dead firsts were re- 

 moved, but a dozen were still lively. August 9 another freshly 

 emerged nymph was noted, and on the 10th 2 more. August 13, 

 removed a second-instar form, and on August 15 another newly 

 hatched was noted. August 16, a dark nymph was caught in the 

 act of killing a white newly emerged brother. He was upon the 

 back of his victim with beak inserted just back of the unfortunate's 

 head. The latter was struggling, but to no avail. On August 18 

 one second-instar form w'as isolated and 34 dead first-stage bugs 

 removed. Mr. Hoffman found three nymphs feeding upon their 

 fellows, and all three victims were alive and kicking. There were 

 about a dozen live bugs of this stage. August 21' brought forth 

 3 second-stage bugs, which were taken out. August 22, 11 dead 

 firsts were moved, and on the 23d 3 dead firsts and 1 live second 

 removed. August 24, 2 dead firsts were taken out. August 29, 5 

 dead first were removed, and on August 31 the female was found 

 dead. Twenty-three dead nymphs were counted out and 8 eggs 

 transferred to another stender. No live nymphs were present, and 

 the jar was set aside till September 20, when a careful count was 

 made of remains — 10 eggs and 16 nymphs completed the record for 

 this pair. The above notes have been given to show the result of 

 trying to rear the bugs together. 



