190 
Journal of Agricultural Research 
Vol. XXIX, No. 4 
flying by August Busck at Paraiso, 
Canal Zone, Panama, on April 24, 1911, 
and is now in the collection of the 
United States National Museum. This 
may be Armitermes ( Rhynchotermes) 
perarmatus, as perarmatus is the only 
species so far collected in Panama. 
A. ( R .) nasutissimus Silvestri of South 
America appears to be different. It is 
not A. ( Armitermes) armigera Mots- 
chulsky, as it was tentatively and 
doubtfully determined by Nathan 
Banks in 1918. 
Winged male adult. —Head casta- 
neous brown, longer than broad, round¬ 
ed posteriorly, with a few scattered long 
hairs. Fontanelle hyaline, tinged with 
yellowish, a raised round spot in a de¬ 
pression, smaller than an ocellus. Eye 
black, large, projecting, not round; 
ocelli hyaline, elongate, projecting, 
close to eyes, on rim of frontal slope. 
Postclypeus lighter colored than head, 
bilobed, projecting. 
Antennae yellow-brown (broken), 
with long hairs; third segment longer 
than second or fourth; fourth slightly 
longer than second; fifth and fourth 
subequal. 
Pronotum yellow-brown, anterior 
margin slightly elevated, nearly 
straight, sides roundly sloping to pos¬ 
terior margin, which is broadly round¬ 
ed and emarginate. 
Wings smoky yellow, costal veins 
golden yellow, margins ciliate, wing sur¬ 
face hairy . Forewing with median vein 
nearer to cubitus than to subcosta, 
branching to apex of wing, cubitus 
nearly in center of wing, not reaching 
apex, with 11 branches or sub-branches 
to margin of wing. 
Legs yellow-brown, slender, elongate, 
pubescent. 
Abdomen light yellow-brown, with a 
row of dense long hairs at base of each 
tergite; cerci fairly prominent. 
Measurements. 3 —Length of entire 
winged adult: 15.00 mm. Length of 
entire dealated adult: 7.00 mm. Length 
of head: 1.90 mm. Length of prono¬ 
tum: 0.80 mm. Length of forewing: 
13.00 mm. Length of hind tibia: 2.00 
mm. Diameter of eye (long diameter): 
0.45 mm. Width of head (at eyes): 
1.60 mm. Width of pronotum: 1.40 
mm. Width of forewing: 4.80 mm. 
The wing is hairy, whereas that of 
A . (R.) nasutissimus Silvestri is not 
hairy. A. ( R .) perarmatus also has 
longer hind tibiae than nasutissimus. 
Comparison was made with a winged 
male adult of nasutissimus determined 
by F. Silvestri and donated by him to 
the United States National Museum, 
No. 47. 
Nasutitermes (Obtusitermes) biformis 
Snyder. 
Dealated adult. —Head dark 
brown, with a reddish tinge, suboval, 
fairly flat, a narrow slope toward 
anterior margin, with dense, long 
hairs. Fontanelle a hyaline, narrow 
slit in a depression on vertex at about 
middle of eyes. Eyes black, nearly 
round, prominent, very near lateral 
margin of head; ocelli hyaline, sub¬ 
oval, fairly large, inset, at an oblique 
angle to eyes and separated from eyes 
by a distance less than the small 
diameter of an ocellus. Left mandible 
reddish-brown, first and second teeth 
approximately subequal. Postclypeus 
yellow-brown, not prominently arched, 
length less than half the width. 
Antennae yellow-brown, of thirteen 
(-f ?) segments, with long hairs; third 
segment very short, ringlike; fourth 
shorter than second; segments becom¬ 
ing longer and broader toward apex, 
but all more or less wedge-shaped and 
fairly short. 
Pronotum of same color as head, 
very slightly saddle-shaped, almost 
subcordate, anterior margin almost 
straight, posterior margin emarginate, 
sides rounded and sloping roundly 
to posterior margin, with dense long 
hairs. 
Wing scale nearly as long as pro¬ 
notum. 
Legs light yellow-brown, fairly 
slender, pubescent. 
Abdomen with tergites slightly lighter 
colored than head, with dense long 
hairs; cerci fairly prominent. 
Measurements. —Length of entire 
dealated adult: 5.50 mm. Length of 
head: 1.00 mm. Length of pronotum: 
0.50. Length of hind tibia: 0.80 mm. 
Diameter of eye (long diameter): 0.25 
mm. Width of head (at eyes): 0.95 
mm. Width of pronotum: 0.70 mm. 
Described from two dealated coloniz¬ 
ing adults (male and female) collected 
in a small cavity in a decayed branch on 
the ground at Barro Colorado Island, 
Canal Zone, by J. Zetek and I. Molino 
on August 22, 1923; they are probably a 
young royal couple. 0 . biformis was 
described in 1924 from the soldier caste 
alone, the type locality being Quipo, 
Republic of Panama; these specimens 
were not found with soldiers, but sol¬ 
diers and workers were in the branch, 
3 They were made from a dry, pinned specimen. 
