.iiS" 



Q NORTON, 



Pachyeondyla Orizabana Norton (nov. sp.)- 



Woi'Jcer. Length, 0.37. Color dull black, with the 

 radicle and apex of antennee, mandibles, and legs below 

 tips of knees, ferruginous. Head subquadrate, long, emar- 

 ginate behind; eyes small, round, placed below the 

 middle of face. Antennae inserted below the line of eyes, 

 their basin small. Mandibles polished, with a few punc- 

 tures near the teeth ; teeth numerous. Head and thorax 

 with somewhat confluent longitudinal striae. Thorax 

 compressed behind, the sides of mesothorax abrupt and 

 margin angulate ; separation of scutel and mesothorax 

 obsolete. Node subquadrate, abrupt before, as high as 

 next segment, not as wide ; first segment as large as the 

 second, margin of all the segments indistinctly ferrugin- 

 ous. Tergum dull, shining, without punctures or striae. 

 Spines of four hinder tibia simple, those of the anterior 

 pair pectinate. Claws simple. (One specimen.) This 

 may prove to be the worker of JF*. Montezumia Smith. 



Pseudomyrma thoracica Norton (nov, sp.). 



Worlcer. Length, 0.25 in. Color, ochre-yellow, with 

 the final segments of abdomen banded with fuscous, and 

 the femora and tibiae blackish in the middle. Eyes large ; 

 ocelli fuscous, mandibles tipped with black, strongly den- 

 ticulate within, the first largest. Head once and a half 

 times wider than thorax, slightly emarginate behind. 

 Thorax flattened above ; metathorax subquadrate, declivity 

 abrupt, margins of sides almost angulate, a slight tubercle 

 on each side near the front. A blunt tooth near the apex 

 of first node beneath and near the base of the same. 

 Abdomen with fuscous spots, on the hinder segments with 

 blackish bands. The femora and tibia, except at base 

 and apex, blackish. Claws bifid. (Ten specimens.) 



Pseudomyrma bicolor Guerin. 



GuiiRiN, Icon. Reg. anim. Ill, 427. Brazil, Panama, 

 Mexico. 



Worker. Length, 0,30 in. This is quite va- 

 riable in color.- The specimens examined are 

 black, with the antenuEe except lower half of 

 scape, the prothorax, first node, and legs below 

 the knees yellow-red. 



