ENTOMOLOGICAL NEWS. 



[Jan., '06 



Standards of the Number of Eggs Laid by Insects — IV* 



Being averages obtained by actual count of the combined 

 eggs from twenty (20) depositions or masses. 



By A. Arsene Girault. 



5. Arilus cristatus Linnaeus. 



No. 



Date, 1903 



Mar. 20 



No. counted 

 per mass 



160 

 136 

 136 

 138 

 114 

 Il8 

 90 

 167 



126 

 125 

 133 

 119 



'53 

 105 

 151 

 in 

 42 

 172 

 112 



Max. Min. 



Range 



172 



42 



172 



172 



42 



42 130 Finals 



The egg-masses were collected at Annapolis, Md., in a small 

 peach orchard, where they have been unusually abundant for 

 the past three or four years. In other orchards, in the imme- 

 diate vicinity, none could be found, nor on trees other than 

 fruit trees, except rarely. The insect apparently shows quite 

 a preference for peach, as a place of deposit for eggs, and it 

 seems to have a tendency to exist in isolated colonies. 



Most of the estimates of the number of eggs deposited by 

 this insect fall below the average obtained. 



* For the first three of this series see Ent. News, 1901, p. 305; 1904, pp. 2-3, and 1905, 

 p. 167. 



M. Witte says the peace of Portsmouth was signed in order to get rid 

 of the mosquitoes. 



