284 ENTOMOLOGICAL NEWS. [June, '09 



June 30, 1908, Ft. Collins, can find no lice on any of the 

 bushes where they were so abundant in May. 



September 10, 1907, alate males, viviparous females and the 

 white oviparous females all present on leaves of snowball now. 

 Some of the oviparous females are nearly full grown. 



September 15, 1908, Ft. Collins. Mr. L- C. Bragg tells me 

 he found the first return migrants upon snowball leaves today. 



September 22, 1900, alate females are giving birth to white 

 larvae upon snowball leaves. 



September 27, 1908, Ft. Collins. Mr. Bragg brought snow- 

 ball leaves in the laboratory today, having males, viviparous 

 females and the little white oviparous females upon them. 



October 8, 1908, Denver, Colo., alate males and females and 

 oviparous females are plentiful upon leaves of snowball in city 

 park. 



October 15, 1908, Ft. Collins, some of the oviparous females 

 are now fully grown and laying eggs. 



October 17, 1899, scattering specimens of alate viviparous 

 females on snowball leaves now. 



October 25, 1900, both males and oviparous females are upon 

 the leaves and adult oviparous females are laying eggs. 



Mr. J. T. Monell, to whom I am indebted for many valuable 

 notes and suggestions in relation to plant louse studies, per- 

 mits me to make the following extract from his letter to me 

 dated February 3, 1909. 



"I have examined the slide of the Viburnum aphis with 

 much interest and thank you for it. I think you will be inter- 

 ested to know that I have found the same species here and 

 that it shows the same tibial sensoria. * * I enclose brief 

 notes which agree with your observations. 



"Aphis, n. sp., 532, Apr. 24, '07. 



"Cold backward spring. Stem-mothers with minute young, 

 curling leaves into pseudo galls on snowball bush in my yard. 



"Apr. 28, '07, green pulverulent stem-mother still present. 



"May 10, '07, pupae and some winged lice in rolled leaves. 



"May ii, '07, winged lice found but no apterous ones. 



"Nothing further seen of the species though the bushes 

 were frequently examined afterwards." 



