50 ME. smith's catalogue of htmenopterotjs insects 



with a few fuscous hairs on the disk of the mesothorax ; the wings 

 hyaline, with the nervures pale testaceous. Abdomen : pale testaceous 

 and densely clothed with short yellowish-white pubescence. 



Hab. Borneo. 



A very distinct species from any hitherto described : its densely pubescent 

 body is a distinguishing characteristic. 



G-enus TmaoNA, Jurine, 



1. Trigona ventralis. T. nigra; abdomine nigro-piceoj segmento 

 basali supra, abdomine subtus albis. 



WorTcer. Length If line. Head and thorax black ; the extreme base 

 of the scape, and the flagellum rufo-fuscous ; the tips of the mandibles 

 ferruginous ; the clypeus and lower part of the face with a cinereous 

 pile. Thorax: narrower than the head; the mesothorax margined 

 with short whitish pubescence, the outer margin of the tegulae rufo- 

 piceous ; the wings hyaline and iridescent, the nervures dark ferru- 

 ginous ; the apical joints of the tarsi pale ; the posterior tibiae broadly 

 expanded towards their apex, their upper margin thinly fringed 

 with pale hairs, the basal joint of the tarsi clothed with golden 

 pubescence within. Abdomen dark rufo-piceous ; the basal segment 

 white, beneath entirely so. 



Hab. Borneo (Sarawak). Malacca (Mount Ophir). 



2. Trigona atripes. T. flavescenti-rufa ; alis dimidio basali fuscis, 

 apieali lacteis, tibiis tarsisque intermediis et posticis nigris. 



Worker. Length 2\ lines. Pale reddish-yellow ; the flagellum fuscous 

 above ; wings reddish-brown, with their apex beyond the stigma 

 milky-white ; the intermediate and posterior tibiae and tarsi black, 

 the apical joints of their tarsi ferruginous ; the anterior legs entirely 

 reddish-yellow ; the scutellum fringed with fuscous hairs. 



Hab. Malacca (Mount Ophir). 



3. Trigona thoracica. T. nigra; thorace obscure ferrugineo, alis 

 flavo-hyalinis, abdomine basi pallide testaceo. 



Worker. Length 3i lines. Black : the scape of the antennae at the 

 base, the clypeus and mandibles at their base, ferruginous. Thorax : 

 obscurely ferruginous, the legs more or less ferruginous towards their 

 base ; the wings flavo-hyaline. Abdomen smooth aud shining, pale 

 testaceous at the base. 



Hab. Singapore. ^ ^ ^ ^> • r? . ' ' . 



4. Trigona nitidiventris. T. nigra; alis subhyalinis, coxis et 

 unguibus pallide ferrugineis ; abdomine supra nitido, nigro, subtus 

 pallide testaceo. 



Worker, Length 3^ lines. Black : the extreme base of the scape 

 ferruginous ; the wings subhyaline and iridescent, slightly fuscous 

 towards their base, the nervures testaceous ; the margins of the thorax 



