Sept., 1908.] Adams: Notes on Crassiseta. 151 



It was rushed right down the nest hole, over amazons, slaves and sexed 

 ants. One arrival was a fly ; another a round, green bug about three 

 eighths of an inch long, being convoyed by four slaves; and another 

 a worm an inch and a half long under control of three others. < H 

 the latter three, each seemed to be desirous to bring it in alone as her 

 particular booty. At one moment, one slave suddenly and swiftly 

 backed up a grass stem with the worm dangling in mid-air with her 

 chief competitor dangling from the worm, while the third ant was left 

 on the ground till the others came down again. But the second had 

 not been gotten rid of so easily by this act, for she continued to hold 

 on desperately. 



August 11. Up to this date, when camp was broken, the ants did 

 not go out on another slave raid so far as I could discover, although 

 I kept daily watch on them except in stormy weather. However, a 

 few amazons were seen outside of the nest on a few occasions. A few 

 more fitful indications of swarming took place, two or more winged ants 

 being out this day, but none were seen to fly away. The swarming 

 above noticed (July 22) followed so soon on the heels ol the slave raid 

 (July 21) that I am inclined to ask if the time of swarming can be 

 conditioned by a slave raid, or attendant to it ? Further, what has the 

 sudden foray to do with the swarming instinct ? One thing seemed to 

 me fairly clear — that after as successful an expedition as the one here 

 described this species of ants does not foray as frequently as the sangui- 

 neus, which would seem to indicate a quicker satisfying of this interest- 

 ing instinct. 



NOTES ON NORTH AMERICAN SPECIES OF 

 CRASSISETA V. ROS. 



By C. F. Adams, 



Fayettevillk, Ark. 



At various times the species of this genus have been catalogued 

 and listed under either Crassiseta or Elachiptera, and of late Ameri- 

 can students have considered these two generic terms synonymous, 

 giving the latter priority. Bezzi (Contribuzione alia Fauna Dittero- 

 logica Italiana, I, pp. 33-34, 1895) reserves the name Eladiiptera for 

 brevipennis Mg., and Crassiseta for the remaining species. The Ital- 



