158 Mr. Smith's Descriptions 



and the petiole of the abdomen, red ; the node elevated anteriorly ; 

 the second segment globular, the extreme apex testaceous. 



This species is from Columbia, and I think must be the same 

 as that described by Guerin. I have only seen the single specimen 

 which is in my own Collection. 



Sp, 2. Pseiidomyrma unicolor, n. s. 



Worker. — Length 5| lines. Black, smooth and shining, 

 covered with fine, short, pale, glittering pubescence, interspersed 

 with scattered, erect, long, pale hairs ; the upper surface of the 

 thorax flattened, having the sides sharp and angulated ; the man- 

 dibles rufo-testaceous ; the claws rufo-piceous, the calcaria pale 

 testaceous ; the metathorax slightly curved above, from the base 

 to the apex. 



This species is from Brazil. I believe this insect would fall 

 into the genus Condylodon of Lund. I have been unable to detect 

 anything beyond specific differences between that genus and 

 Pseudomyrma, as characterized by M. Guerin. In my own Collec- 

 tion. 



Sp. 3. Pseudomyrma termitaria. 



Female. — Length 3| lines. Head black; the anterior margin 

 of the face, the mandibles and scape ferruginous; the thorax and 

 legs ferruginous, the wings hyaline, the nervures pale testaceous, 

 the stigma fuscous ; the tibiae have the calcaria pale testaceous ; 

 the metathorax rounded posteriorly; the two nodes and basal 

 segment of the abdomen ferruginous ; the apical segments black ; 

 the entire insect is smooth and thinly covered with a very fine 

 sericeous pile ; the form of the thorax is an elongated oval, rather 

 widest in front. 



Worker. — Length 2| lines. Coloured the same as the female; 

 the thorax rather widest in front, the sides being compressed. 



Mr. Bates finds this species constructing its elliptical chamber, 

 or dwelling, in the walls of the tumulus of a species of white ant. 

 I have no doubt of this being a species of Pseudomyrma, as de- 

 scribed by Lund ; its head is rather larger, and the eyes larger 

 than in the other species. 



Sp. 4. Pseudomyrma macvlata. 

 Worker. — Length 3 lines. Head, antennae, thorax and legs pale 

 ferruginous ; a small fuscous spot on the vertex, enclosing the ocelli ; 

 the eyes, a stripe down the middle of the metathorax, not reach- 

 ing the apex, fuscous ; the femora above, and the posterior tibiae 



