154 The University Science Bulletin. 



Rearing Number 1, Series n. 

 The pair was transferred from Im to this stender, containing 

 sand, on July 8 ; observed mating on the 11th and removed on the 

 12th. Could find no eggs, and though this stender was studied till 

 July 29, no nymphs appeared. 



Rearing Number 1, Series o. 

 Transferred the pair from number In to this stender, containing 

 sand, July 12. On July 24, 4 nymphs hatched, and so I removed the 

 adults to another stender and transferred the nymphs to jars as they 

 hatched. The rearing table marked lo series indicates the dates of 

 hatching. But to this list of 49 must be added the following: July 

 27, 6 first instars in large stender, labeled lOh. August 6, 4 dead 

 instars; and August 8, 2 more. A total, therefore, of 61 hatched 

 from eggs deposited between July 12 and 24, an average of 5 per 

 day, with a record of 13 for August 6. Incubation period, 12 days. 



Pair Number Ip. 



This pair of adults was transferred from lo on July 24. They 

 were observed mating on this date and again on August 8, when 2 

 first-instar forms hatched. Removed the male on August 10 and 

 returned on the 18th, This female was caught twice feeding upon 

 her own offspring. Besides the 65 nymphs hatched from August 8 

 to September 27 and used in rearings, 28 dead ones were taken out 

 of this stender in which the pair was confined — a total of 93 off- 

 spring between July 24 and September 27. The observed matings 

 were on July 24, August 8, August 21 and September 20. One adult 

 died October 4 and the other October 23. The rearing data are pre- 

 sented on that portion of the table marked IP series. 



Summing up for this pair of bugs taken from the wild on July 3 

 and entered for observation on July 6, we get a total progeny of 170 

 hatched, and of this number we were able to rear to the adult stage 

 4 insects. 



