1921] Wheeler: Tachigalia Ants 167 



A single small colony with brood inhabiting the petiole of a 

 small Tachigalia on the Puruni trail at Kartabo. 



26. — Camponotus (M ijrmothrix) femoratus Fabr. 



On several occasions I found this very pugnacious ant attend- 

 ing Membracids on the young terminal shoots of small Tachigalias 

 along the Puruni trail at Kartabo. As a rule the femoratus 

 workers were accompanied by the workers of Crematogaster 

 limata subsp. parahiotica. These two ants regularly live in para- 

 biosis in the ant-gardens on the trees of the jungle, as I have 

 shown in a previous paper (1921). 



27. — Camponotus (Myrmobrachys) zoc Forel 



This very active but timid species occasionally nests in the 

 petioles of young Tachigalias but is more frequently found in 

 the cavities of the dead twigs of other trees. 



28. — Componotus (Myr-mobrachys) pittieri Forel var. 

 poenalis var. nov. 



Worker. Of a darker, more piceous brown color than the 

 type from Costa Rica, the gaster being concolorous with the 

 thorax and legs and not paler and more yellowish; the darker 

 brown area on the top of the head is deeper and more extensive. 

 The erect pilosity on the upper surface is distinctly sparser and 

 the hairs on the legs and especially on the scapes are much more 

 oblique, or reclinate. The base of the epinotum is more sloping 

 so that the thorax is distinctly lower behind than in the type. 



Female. Length about 6.5 mm. 



Darker than the worker; front as well as the vertex of the 

 head and also the scutellum, pleurse and posterior portion of 

 epinotum, dark chocolate brown ; mandibles red, with black apical 

 borders. Antennal funiculi not infuscated at the tip. Mesonotum 



« 



rather flat above. Head, pro- and mesonotum subopaque, more 

 strongly punctate than in the worker; scutellum, postscutellum 

 and epinotum distinctly shining. Petiole with broader, more trans- 



