192 
Journal of Agricultural Research 
Vol. XXIX, No. 4 
Legs with tinge of yellow, fairly 
elongate, slender, and with long hairs. 
Abdomen dirty grav-white with tinge 
of yellow, tergites with short hairs and 
a row of long hairs at base of each ter- 
gite; cerci fairly prominent. 
Measurements (major soldier).— 
Length of entire soldier: 3.1-3.3 mm. 
Length of head with nasus: 1.40-1.50 
mm. Length of head to anterior mar¬ 
gin: 0.90-1.00 mm. Length of nasus: 
0.50-0.55 mm. Length of pronotum: 
0.20 mm. Length of hind tibia: 1.10 
mm. Width of head (where widest 
posteriorly): 0.70-0.80 mm. Width 
of head anteriorly: 0.40 mm. Width 
of pronotum: 0.40 mm. 
Minor soldier (fig. 8, c, d). —Head 
pale yellowish, darker at margins and 
at base of nasus, nasus reddish, head 
somewhat pyriform, broadest poster¬ 
iorly, gradually converging toward an¬ 
terior margin, not as great a difference 
in breadth posteriorly and anteriorly 
as in major soldier, somewhat dumb¬ 
bell shaped, markedly but not sharply 
constricted anteriorly, convex in profile 
except for slight depression about cen¬ 
ter of head, with numerous short hairs, 
but with few^ long hairs anteriorly and 
posteriorly. Nasus elongate, slender, 
cylindrical, slightly upturned at apex, 
with short hairs, a few long hairs at 
apex. Mandibles fairly short, sharp 
pointed, with points turned outward. 
Antennae light yellow-brown, elon¬ 
gate, of tw r elve segments, with long 
hairs; third segment subclavate, longer 
than second but shorter than fourth; 
fifth about as long as fourth but broader; 
sixth longer than fifth; seventh slightly 
shorter than sixth; segments becoming 
shorter but broader toward apex; last 
segment more slender, subelliptical. 
Pronotum pale yellow", anterior mar¬ 
gin darker, saddle-shaped, with short 
hairs, margins broadly rounded anter¬ 
iorly and posteriorly, sides slightly de¬ 
pressed posteriorly. 
Legs w"ith tinge of yellow", fairly elon¬ 
gate, slender and with long hairs. 
Abdomen dirty gray-white with tinge 
of yellowy with short hairs on tergites 
and one row of long hairs at base of 
each tergite. 
Measurements (minor soldier).— 
Length of entire soldier: 2.75-3.00 
mm. (aver. 2.90 mm.). Length of head 
with nasus: 1.10-1.175 mm. Length 
of head to anterior margin: 0.75 mm. 
Length of nasus: 0.41-0.45 mm. 
Length of pronotum: 0.15 mm. Length 
of hind tibia: 0.90 mm. Width of 
head (where widest posteriorly): 0.50 
mm. Width of head anteriorly: 0.40 
mm. Width of pronotum: 0.25 mm. 
Winged adult unknown. 
Type locality. — Barro Colorado 
Island, Canal Zone, Panama. 
Described from a large series of major 
and minor soldiers collected by T. E. 
Snyder with workers in a large colony 
at the type locality on February 26, 
1924. Several colonies were found in 
decaying logs, with bark on, near the 
site of the new Tropical Research Sta¬ 
tion building. 
Type, major soldier. —Cat. No. 
27270, U. S. National Museum; mor- 
photype, minor soldier. 
v Mirotermes (Mirotermes) panamaen- 
sis Snyder. 
Dealated adult (male or king).— 
Head light yellow-brown, lighter pos¬ 
teriorly, suboval, longer than broad, 
not as broad as pronotum, with scat¬ 
tered long hairs, more numerous ante¬ 
riorly, postclypeus light yellow, slightly 
bulging, twice as broad as long, promi¬ 
nently bilobed. Eyes black, fairly 
prominent, nearly round, separated 
from lateral margin of head by a dis¬ 
tance less than their long diameter. 
Ocelli hyaline, suboval, separated from 
eyes by a distance hardly equal to the 
long diameter of an ocellus. Fonta- 
nelle, a hyaline narrow elliptical slit 
between middle of eyes. 
Antennae light yellow-brown, of 
fifteen segments, with long hairs, be¬ 
coming longer and broader toward apex; 
third segment very small, shorter than 
second or fourth segments, ringlike; 
fourth shorter than second segment; 
fifth ringlike, shorter than fourth; last 
segment elongate, slender, subelliptical. 
Pronotum light yellow-brown, darker 
posteriorly, anterior and posterior mar¬ 
gins nearly straight, slightly concave 
anteriorly and slightly emarginate pos¬ 
teriorly, sides rounded, sloping slightly 
to posterior margin, with long hairs. 
Wing scale much shorter than pro¬ 
notum. 
Legs light yellow-brown, slender, 
with long hairs. 
Abdomen with tergites brown, darker 
colored than head and pronotum, with 
fairly long hairs, lighter anteriorly; 
cerci prominent. 
Measurements. —Length of entire 
dealated adult (mature first-form male 
or king): 4.00 mm. Length of ma¬ 
ture, dealated queens of the first form 
(with distended abdomens): 5.5-7.0 
mm.; average, 6.76 mm. Length of 
head: 1.00 mm. Length of pronotum: 
0.55 mm. Length of hind tibia: 0.70 
mm. Diameter of eye: 0.16 mm. 
Width of head (at eyes): 0.85 mm. 
Width of pronotum: 0.95 mm. Width 
of abdomen of male: 1.40 mm. Width 
of abdomen of queens: 2.5-2.8 mm.; 
average, 2.65 mm. 
