of Exotic Hymcnoi)tcra. 69 



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

 superior margin shai-p and rounded ; the body, antennje, and legs with 

 a scattered, thin, pale pubescence. 



3Iale. 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 nan-ower than the thorax ; the antennae a little 

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

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

 J£ab. Ega (Brazil). In the Collection of the British Museum. 



This ant constructs a papeiy 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 ii'regular : 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. fasco-nigra, pilis flavo-cinereis hirtula; abdomine ferrugineo ( $); alis 

 pellucidis, venis fusco quasi marginatis ( d" $ ). 



Female. Leng-th 3^^ lines. The head, antennae, thorax, and legs 

 dark brown ; the head finely shagi'eened ; 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 

 coxfe, the base of their femora, the anterior femora beneath, and the 

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

 shagi-eened, and has a thin, scattered, pale pubescence; the legs are 

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

 stain along their com'se. Abdomen ferruginous and pubescent; the 

 scale of the pedimcle 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. 



Hub. St. Paul" (Brazil). Taken from the nest by I\Ir. H. W. Bates, In 

 the Collection of the British Museum. 



Subfamily Mtbmicid^, Smith. 

 Genus Psetjdomykma, Gucr. 

 1. Pseudomyrma perforator. 



.P. capite thoraceque nigro-fuscis : abdomine rufo-testaceo. 



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



