66 Mr. F. Smith's descriptions of new species 



hyaline and iridescent, the nervures testaceous, the stigma 

 large and black. The two nodes of the abdomen elongate 

 and petiolated, the basal one longest; the abdomen oblong 

 and shining. 

 Hab. — Mexico. 



54. Pseudomyrma rufomedia. 



Female. — Length 4| lines. Head and abdomen black ; 

 thorax ferruginous. Head oblong, slightly narrowed 

 anteriorly and posteriorly, semi-opaque, with longitudinal 

 irregular striation ; eyes oblong-ovate ; the mandibles rufo- 

 piceous. Thorax flattened at the sides; the mesothorax 

 and scutellum black : wings hyaline, the nervures testa- 

 ceous, the stigma fuscous ; legs black, with the apical 

 joints of the tarsi rufo-testaceous, as well as the trochanters 

 of the intermediate and posterior legs. The first node of 

 the abdomen ferruginous, compressed, and arched above ; 

 the second node and the abdomen shining black, with a 

 thin hoary pile and a few pale hairs towards the apex. 



Hab. — Guatemala. Type in British Museum. 



55. Pseudomyrma ca.nescens. 



Female. — Length 4^ lines. Black, and densely covered 

 with a fine hoary pile. Head oblong, widest anteriorly ; 

 eyes large and oblong-ovate, anterior margin of the head, 

 before the insertion of the antenna, and the mandibles, 

 pale yellow. Thorax : the anterior tibise and tarsi, and 

 the tips of the femora, yellow ; the intermediate tibi» 

 behind, also the apex of the femora and the posterior tibise 

 behind, obscurely pale testaceous ; the wings hyaline, the 

 nervures testaceous. Abdomen : the first node clavate, 

 narroAved into a petiole at the base ; the second node sub- 

 globose. 



Hab. — Abydos (Brazil). Type in British Museum. 



66. Pseudomyrma penetrator. 



Female. — Length 4;^^ lines. Rufo-fulvous ; head oblong, 

 slightly narrowed anteriorly, with the sides nearly parallel, 

 smooth and shining ; a black spot between the ocelli. 

 Thorax oblong-ovate, shining ; the scutellum and disk of 

 the mesothorax slightly rufo-fuscous, the femora also 

 darker than the tibiae and tarsi ; wings subhyaline, the 

 anterior pair slightly clouded at their apex, the nervures 



