42 INSECTS INJURIOUS TO FORESTS. 
to the first part of July, 1914, molting large-headed soldier larve 
and nymphs of Leucotermes flavipes were found in colonies in Vir- 
ginia. After the first part of July freshly molted, pigmentless 
nymphs of soldiers were common in colonies. On August 17, 1913, 
molting soldier larvee were found in the quiescent stage in a colony 
of virginicus at Chain Bridge, Va. During the quiescent stage differ- 
entiation took place. Larve to all external appearances undiffer- 
entiated or of the worker type (as shown by the head, mandibles 
with marginal teeth, and labrum of the still adhering larval skin), 
the individuals (virginicus) being over 3 millimeters in length, in 
the quiescent condition, develop at this molt to pigmentless nymphs 
of soldiers (Pl. IX, a), with more elongate, soldier-like head, and 
mandibles without marginal teeth. In this stage the head, mandibles, 
labrum, and ‘‘menton” (Bugnion) have not attained the shape or 
length of those of the mature soldier, there being at least one later 
molt to maturity. After the first radical change, the head is not 
pigmented (the only pigmentation being at the inner margin at the 
tips and base of the mandibles, and at the tips of the maxillx), not 
elongate, rounded, tapering toward the base (broad at apex), the 
mandibles shorter and broadening at base. The labrum is elongate, 
subelliptical, tapering at apex and slightly at base, wider than in 
the mature form; the ‘‘menton” is convex, tapering toward base, 
wider than in the mature form. The antenne have 14 segments. 
After the next molt the nymph is as yet shorter than at maturity, 
being from 4.5 to 5.5 millimeters in length in flavipes, and the head is 
more elongate but still broader at the apex, with the mandibles, 
labrum, and ‘‘menton’’ more elongate and slender. The antenne 
have from 14 to 15 segments. At this stage the mouthparts and 
borders of the antennal sockets are slightly pigmented. (PI. IX, 6.) 
After another molt the full size of the mature nymph is attained 
and there is pigmentation of the chitinized parts (Pl. IX, ¢), there 
being three molts from the large-headed, worker-like larva to the 
mature pigmented soldier. (Pl. IX, d.) 
It will be noted that there is a gradual elongation of the parts, as 
the mandibles, labrum, and ‘‘menton,” and that these parts become 
more slender and loose in width as the mature form is reached.? In 
this connection it might be of interest to state that in the neoteinic 
individuals (neoteinic reproductive forms with short wing pads) the 
head, thoracic segments, and abdominal tergites and sternites are 
both longer and broader than in the reproductive forms that develop 
from nymphs of the first form; that is, the structure at this younger 
retarded early stage is more gross. 


aSnyder, T. E. Changes during quiescent stages in the metamorphosis of termites. 
Proc. Ent. Soc. Wash., v. 15, no. 4, p. 162-165, pl. 6-7, Dec., 1913. 
