HYMENOPTERA FROM SARAWAK. 129 



hair. Wings hyaline, with a slightly fuscous-eoppery irides- 

 cence ; the apex much darker coloured. 



The 5 has the upper part of the thorax covered with 

 yellowish pubescence except in the centre, where there is a 

 broad band of black pubescence of the same width as the lateral 

 bands ; and on the apex, where there is a thin band of pale yel- 

 low pubescence; the upper part of the pleurae is covered with 

 pale yellow pubescence ; the tarsi are thickly covered w\th long 

 black hair ; the black hair on the tarsi is mixed with rufous 

 beneath, on the tibiae with pale, hair. The hair on the sides of 

 the inner and outer orbits is pale. 



I believe I have correctly united the sexes of this species. 

 Both are in the Sarawak collection from Matang, where the 9 

 has also been taken by Mr. Shelford at an elevation of 3000 feet. 

 The 5 agrees, in the arrangement of the hair bands, with that 

 of X. perversa Weid. from Java, but the females are different. 



Trigona erythrogastra, sp. now 



Black ; the basal three segments of the abdomen rufo-testa- 

 ceous, the others black, suffused with rufo-testaceous, especially 

 at the sides ; the wings yellowish -hyaline to the stigma, the rest 

 hyaline ; the stigma and nervures rufo-testaceous. 9 • 



Long: 7 mm. 



Hab. Sarawak (R. Shelford). 



Antennee black, the flagellum brownish beneath, more 

 broadly and distinctly on the apical than on the basal half. The 

 occiput and the hinder part of the vertex are thickly covered 

 with long black, stiff hair ; the front is covered with a dark 

 fuscous, thick pubescence and above sparsely with black hair. 

 Clypeus thickly covered with fuscous down and smooth and 

 shining. Mandibles black, smooth and shining. Thorax black, 

 smooth and shining ; the base of the mesonotum and the hinder 

 part of the scutellum covered with long stiff black hair ; the 

 propleura? covered sparsely with long black hair ; the metapelurpe 

 thickly with a fulvous down. The first transverse cubital 

 nervure is faint above and almost obliterated in the middle ; the 

 second is very faint. Legs black ; their hair is also black. The 

 ventral surface is rufous. 



15 



