484 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
The subgenus Myrmeuryota includes*the species which have the 
meso- and epinotum armed with spines. Of the nine known species, 
all excepting C. (M.) heathi and C. (M.) eurynotus Forel are West 
Indian. The latter species, described from a worker minor from 
Tonantins in Brazil has the pronotum much broader than in C. (M.) 
heathi, the epinotum is different and the petiolar node is not spinose. 
Like C. (M.) cristophet and C. (M.) toussainti, which I found on leaves 
and tree trunks in Hayti, C. (M.) heatht is probably an arboreal 
species. 
I have much pleasure in dedicating this extraordinary species to 
my former professor, Dr. Harold Heath, a member of the Stanford 
Expedition and my companion on many collecting trips. ' 
216. Dendromyrmex traili May. rufogaster, var. nov. 
Several specimens in the Wheeler collection from Bolivia (Stau- 
dinger) differ from Mayr’s description in having the gaster chestnut 
red, instead of black. In other characters these agree well with the 
description, and should, I think be considered a distinct variety of 
D. trailr. 
217. Dendromyrmex nidulans Smith. 
One specimen, referable to this species, taken at Camp 39, Madeira- 
Mamoré R. R. Dendromyrmex nidulans most closely approaches 
D. fabrictti Roger but has not a dense mat of pubescence on the gaster. 
218. Dendromyrmex fabric Roger. 
One worker from Para. 
219. Dendromyrmex chartifex Smith var. felis, var. nov. 
The worker of this variety differs from the typical form in being 
subopaque instead of shining. The whole body is more hairy. The 
dense pubescence on the gaster gives it a velvety appearance. The 
color is yellowish brown. 
Female (deailated). Length 10.5 mm. 
Head small, sides in front of eyes almost straight, curving slightly 
towards base of clypeus; sides behind eyes convex to posterior margin, 
which is slightly concave. Clypeus broad, carinate, the anterior 
