362 MISSES K. FOOT AND E. C. STROBELL : EESULTS OF 



APPENDIX II. 



Records of Eleven Pairs of Bugs that were Isolated 



THROUGH THEIR BREEDING PeRIOD. 



As details of breeding experiments can be of value or interest only to 

 those who may care to repeat such experiments with the same or allied 

 species, we have not published the following details in the text, but have 

 added them here in a convenient form for reference. 



The following records are extracts from our notes. We have selected 

 only the main points essential for comparison, omitting such details as the 

 dates of hatching, the dates of the five moults, and the number of nymphs 

 that survived each moult, &c., &c. Tlie length of time given for each 

 mating is the minimum, as it is estim:).ted from the time the pair was 

 found mating until the last record before they were found apart. The 

 bugs were closely watched during the day, and observations made two 

 or three times during the night. The number of eggs that hatched is 

 also the minimum, for in some cases we counted only those nymphs that 

 survived the first moult. Before the first moult these small bugs generally 

 keep closely segregated in a compact mass, and it is impossible to count 

 them accurately when a large number is hatched. 



Record I. Cage 2.— 1011. 



One Pair of E. variolarius. 



(Collected April 16tb, at White Plains, New York, by J. II. de la torre Bueiio.) 



April 



20tli. 6.30 A.M. mating- : continued to mate 9^ hours. 



28th. 5.00 p.m. ditto ditto 19 hours. 

 May 



3nd. 1.30 P.M. ditto ditto 17^ hours. 



7th. 6.00 A.M. ditto ditto 9 hours. 



10th. 6.00 a.m. ditto ditto 15 hours. 



22nd, 4 eggs, all hatched : 3 reared to winged stage — (2 J & 1 2 )• 



June 



9th. 29 eggs, 20 hatched. (Found the S sucking these eggs : had sucked the 

 entire contents from two.) 16 reared to winged stage — (7 c? & 9 5). 

 26th. 5.30 A.M. mating : continued to mate 3^ hours. 



July 



1st. 28 eggs, all hatched : 15 reared to winged stage — (9 S & 6 $ ). 



7th. 28 eggs, all hatched. Killed all after 3rd moult to preserve as njmphs. 



13th. 6.30 A.M. mating : continued to mate 61 hours, 



14th. 5.30 A.M. ditto ditto 4^ hours. 



