426 bulletin: museum of comparative zoology. 



Color as in worker, but the head is more infuscated. 

 Described from a female and several workers found in a twig lying 

 on the ground at Para. 



69. Pseudomyrma gracilis (Fabricius). 



Many colonies of what seems to be the typical form of this species 

 were taken from twigs at Manaos. The workers (7.5 mm. in length) 

 are colored black, excepting a narrow border at the anterior of head, 

 the clypeus, mandibles, the tips of the front, and intermediate femora 

 and the tarsi, which are ferruginous. 



70. Pseudomyrma excavata Ma^T. 



Three workers from Manaos agree with specimens from Costa Rica 

 received from Dr. Forel. 



71. Pseudomyrma laevigata F. Smith. 



One small colony found in a twig at Manaos. The specimens are 

 yellow in color, without trace of maculation. 



72. Pseudomyrma mutilloides Emery. 



A worker each from Itacoatiara and Camp 39 Madeira-Mamore 

 Railroad. 



73. Pseudomyrma subtilissima Emery subsp. tenuissima Emery, 



Taken at Natal and Maranhao. The colony from the latter locality 

 was taken from beneath a loose piece of bark, quite an unusual situ- 

 ation for Pseudomyrma. The type of P. tenuissima is from Matto 

 Grosso. Emery records a specimen also from Cayenne. 



74. Pseudomyrma maculata F. Smith. 



One colony from Natal is very doubtfully referred to this species. 

 The worker is 4 mm. in length. 



Head large, broadest in front, sides convex, posterior margin trun- 

 cate, much broader than pronotum; antennae thickened at apex. 



