174 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 2 



parations for the woolly aphis. I have ahvaj's thought there might 

 be some field of usefulness for these preparations, as dips for this pest. 



A Member : JNIr. President, last year part of our trees were dipped 

 in a tobaeeo preparation for the woolly aphis and for the green aphis 

 on the tops. We expect to dip about 20,000 this year. I hope, that 

 Mr. Parrott will try it. We are not certain how effective it is. 



Mr. Hitchings: Last week a gentleman came to me and asked if 

 he would be allowed to bring scions from an infested district to Maine, 

 as he wished to use them to graft his trees. He wanted to secure sev- 

 eral thousand. Would it be safe to have these scions dipped or should 

 they be fumigated ? 



A Member : Fumigated every time, I should say. 



[The remainder of the Proceedings will appear in the next issue. — 

 Ed.1 



THE LIFE HISTORY OF THE ARGENTINE ANT 



Iridomyrmex huinilis Mayr 

 By WiLMOx Neweli, 



A general account of this species and its habits appeared in the 

 Journal of Economic Entomology, Vol. I, p. 21 to 34 and accounts 

 of two inquilines occurring in its nests were given in the same vol- 

 ume, p. 262. On p. 289-293, Mr. E. Foster published an interesting 

 account of the introduction of this ant into New Orleans. 



The present paper is intended to deal only with the more salient 

 features of this insect's life history which have been brought to light 

 in the course of the author's studies during the past two years. 



There are but three adult forms in the case of this ant, the queen, 

 male and worker. Of the immature forms there are three, egg, larva 

 and pupa, of each the queeii, male and worker. There is hardly 

 sufficient difference between the virgin queen and the dealated queen 

 after fertilization to justify considering them as distinct forms. A 

 possible fourth stage may be recognized in the "callow," which is 

 the term used by some writers in referring to the worker which has 

 completed its transformation from pupa to adult Init which has not 

 attained the normal worker color and activity. A complete colony 

 may therefore consist of queen and workers only, of queens and 

 workers or of queen (or queens), males and workers: with each of 

 these combinations may be associated any one or all of the three im- 

 mature stages corresponding to each of the three adult forms, or 



