of Exotic Hymenoptera. 09 



clear cliestnut-red ; the scale of the peduncle incrassate at the base, its 

 superior margin sharp and rounded ; the body, antennae, and legs with 

 a scattered, thin, pale pubescence. 



Male. Length 3^ lines. Brownish-black, shining; the legs very 

 slender, elongate, and, as well as the apex of the abdomen, pale rufo- 

 testaceous. The head narrower than the thorax ; the antennae a little 

 longer than the thorax, very slender, the scape as long as the fiagellum. 

 The abdomen ovate-lanceolate, the scale of the peduncle subglobose. 

 Hub. Ega (Brazil). In the Collection of the British Museum. 



This ant constructs a papery nest, in texture and appearance like 

 thin coarse brown paper ; it is usually attached to the underside of a 

 leaf, and about 2 inches long by 1 inch broad ; the inner chambers 

 are intricate and irregular : when alarmed, the workers issue forth 

 in great commotion, making a curious rattling noise by vibrating 

 their abdomens over the papery nest, apparently for the purpose of 

 intimidating their enemies. 



2. Formica nidulans. 



F. fusco-nigra, pilis flavo-cinereis hirtula; abdomine ferrugineo ( $ ); alis 

 pellucidis, venis fusco quasi marginatis ( tf $ ). 



Female. Length 2>\ lines. The head, antennae, thorax, and legs 

 dark brown ; the head finely shagreened ; the front, as well as the eyes, 

 prominent, the latter ovate ; the ocelli minute ; the mandibles ferrugi- 

 nous, and furnished with a number of acute black teeth ; the tips of the 

 antennae rufo-testaceous ; the head and scape with a thin yellowish- 

 white pubescence. Thorax black, with the intermediate and posterior 

 coxa?, the base of their femora, the anterior femora beneath, and the 

 apical joints of all the tarsi rufo-testaceous ; the thorax is finely 

 shagreened, and has a thin, scattered, pale pubescence; the legs are 

 also pubescent ; wings subhyaline, the nervures fuscous, with a brown 

 stain along their course. Abdomen ferruginous and pubescent; the 

 scale of the peduncle black, incrassate, its superior margin rounded. 



Worker. This is rather smaller than the female, the thorax more 

 elongate, the sides straighter and narrowed posteriorly ; the legs paler 

 and rather more elongate. 



Hah. St. Paid: (Brazil). Taken from the nest by Mr. H. W. Bates. In 

 the Collection of the British Museum. 



Subfamily Myrmicid^:, Smith. 

 Genus Pseudomybma, Gner. 

 1 . Pseudomyrm a perforator. 

 F. capite thoraceque nigro-fuscis ; abdomine rufo-testaceo. 



Worker. Length 3J lines. The head, thorax, and femora dark 



