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.) hcathi and C. (J/.) curynohis Forel are West 

 Indian. The latter species, described from a worker minor from 

 Tonantins in Brazil has the pronotum much broader than in C. (J/.) 

 heal hi, the epinotum is different and the petiolar node is not spinose. 

 Like C. (M.) cristophei and C. (i/.) toussainti, which I found on leaves 

 and tree trunks in Hayti, C. (M.) hcathi 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. rufogastcr, 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. traili. 



217. Dendromyrmex nididans Smith. 



One specimen, referable to this species, taken at Camp 39, Madeira- 

 Mamore R. R. Dendromyrmex nididans most closely approaches 

 D.fahricii Roger but has not a dense mat of pubescence on the gaster. 



218. Dendromyrmex fabricii 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 (dealated). 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 



