1901.] NATURAL SCIENCES OF PHILADELPHIA. 489 



at. her during the succeedipg three days. Of course, the sequences 

 noted may have been merely double coincidences in two unusual 

 proceedings of the ants. 



Both majors and minors among the Stenamma fulvum jiic&um 

 sometimes lay eggs, especially Avhen no queen is present in their 

 habitation. The number of eggs laid is sometimes considerable. 

 I have seen as many as three hundred at once in a nest of fifty 

 workers from which a queen had been for several months absent. 

 One of my Petri cells, in which the eggs of five isolated workers 

 came to the larval stage, indicated that the time of incubation 

 of these eggs may be the same as for queens' eggs, eighteen or 

 nineteen days. The first egg was laid on February 21, the second 

 on February 23, and the eggs were gradually increased to ten. 

 The first larva appeared on the 12th and the second on the 14th 

 of March. 



The larval period of workers' -egg-larvte under the care of 

 workers alone, appears to be much longer than for the queens' - 

 egg-larvre under the care of queens alone, or under the care of 

 queens and workers, or under the care of workers alone. Judging 

 from data recorded from five groups of isolated workers that have 

 been rearing their own progenv in ray nests during ten months, I 

 think these Jarvte sometimes take more thon two hundred days in 

 their growth from egg to pupa. 



The workers' eggs are about half as large as are the queens' 

 eggs; the larvre on issuing from the eggs are but half as large as 

 those issuing from queens' eggs; the pupte are also much smaller 

 than are those of males produced from queens' eggs, and the adult 

 males are dwarfs, being from four to five millimeters in length of 

 body, without the wings. 



A colony captured by me on July 13, 1900, lost its only queen 

 on August 25. It was transferred from a Janet to a new, clean 

 Fielde nest on September 6, and after that date had no communi- 

 cation with any other nest. Between the 17th of the following 

 February and the 7th of June, 1901, twelve dwarf males were 

 successively produced. No ants of any other sort were during 

 four months produced in this queenless colony. All twelve of 

 these dwarf males, with the utmost regularity, showed eyespots and 

 ocelli of pale gray on the third day of pupal existence, and the 

 color deepened to black on the fifth day. On the tenth day the 



