32 Mr. F. Smith's Descriptions of new 



dibles and antennae bright, the flagellum more oi- less obscure; 

 the head and thorax very coarsely rugose, the basal segment of the 

 abdomen less coarsely sculptured ; the sculpture running into 

 striee above the insertion of the antennae ; the eyes round and pro- 

 minent ; the mandibles finely aciculate, their inner edge smooth, 

 edentate, with their apex acute. The thorax with an acute tooth 

 on each side of the prothorax and raetathorax j the scale of 

 the peduncle rugose, erect and oblong, slightly rounded above ; 

 the second segment of the abdomen delicately striated, transversely 

 giving it a silky appearance ; the apical segments pale testaceous. 



Genus Pseudomyrma, Guer. 



1, Pseudomyrma cephalica, Smith, Trans. Ent. Soc. (N. S.) iii. 1G8, 



11, ^ ? ^• 

 Hab. Villa Nova (Brazil). 



2. Pseudomyrma Jlavidula, Smith, Cat. Hym. pt. vi. {Formicidce), 



p. 157, 15. 



Hab. Santarem (Brazil). 



3. Pseudomyrma bicolor, Guer. Icon. R^g. Anim. p. 427. 



Hab. Columbia. 



This species is very variable in colour ; the typical form is 

 " dull black, smooth ; the mouth, mandibles, anterior border of 

 the head and carina between the antennae fulvous-red; the first 

 node of the peduncle of the same coloui', with a little spot of the 

 same on each side of the second node." Amongst a series from 

 Panama are individuals, black, with only the mandibles and an- 

 terior margin of the face fulvous-red ; others have the mandibles, 

 anterior margin of the face, thorax above and the peduncle and 

 first node fulvous-red, with a dark stain at the base of the me- 

 tathorax, extending more or less over the prothorax. 



Pseudomyrma modesla. 



P. pallide rufo-testacea, Isevis ; capite fusco ; oculis nigris. 



Worker. Length 3 lines. Pale rufo-testaceous, the head wider 

 than the thorax ; eyes very large, occupying nearly the entire side 

 of the head, ocelli small, glassy-bright, and placed in a triangle 

 on the vertex behind the eyes ; the mandibles, anterior margin of 

 the face and the antennae pale rufo-testaceous. Thorax flattened 

 above anteriorly, the front margin transverse, the lateral margins 



