6 
BULLETIN 333, U. 
DEPARTMENT OF AGRICULTURE. 
life history. Young are kept in a retarded, undifferentiated state 
and can be rapidly turned into supplementary or substitute repro- 
ductive forms of both 
sexes. 
THE SEVERAL TYPES OF RE- 
PRODUCTIVE FORMS. 
The nymphs of the 
first form, with long 
wing pads, develop to the 
winged sexed adults. 
which, after the swarm, 
lose the wings and be- 
c o m e the kings and 
queens of the normal re- 
productive form. These 
normal kings and queens 
are blackish or brown in 
color, have eyes, and re- 
tain the stumps of their 
disc a r d e d wings ( fig. 
4, a). 
From the nymphs of 
the second form, with 
short wing pads, are de- 
veloped, probably by the 
workers, individuals of 
the substitute nymphal 
reproductive form of 
both sexes (PL II. figs. 
3 and 4; text fig. 4, b). 
These nymphs of the 
second form are merely 
nymphs of the first form 
whose usual development 
to the pigmented, winged, 
sexed adults is retarded 
at a certain stage and 
never completed : the in- 
sects, instead, acquiring 
a pale yellowish or gray- 
ish color and becoming 
sexually mature normally after the sexed adults have swarmed. Indi- 
viduals of this neoteinic reproductive form are apparently blind, not 
being destined to leave the parent colony, unless by underground 
tunnels. 
Fig. 3. — Leueotermes fiavipes: Larval, worker-like re 
productive form ( " ergatoid queen," 9 mm. in length 
alcoholic specimens (Original.! 
