410 hymenoptera. 



18. Trigona luteipes. B.M. 



Worker. Length 2^ lines. — Pale testaceous ; the face having 

 on each side a large elongate ovate spot, extending from the 

 stemmata to the base of the mandibles ; the scape pale testa- 

 ceous, the flagellum fuscous ; the vertex and disk of the thorax 

 have a scattered black pubescence ; the wings fuscous ; legs 

 yellow, the apex of the basal joint of the posterior tarsi fuscous -, 

 the apex of the abdomen fuscous. 



Hab. Brazil. 



19. Trigona Ghiliani. 



Trigona Ghiliani, Spin. Mem. Accad. Torino, xiii. 92. 75 (1851). 

 Hab. Para. 



20. Trigona peltata. 



Trigona peltata. Spin. Mem. Accad. Torino, xiii. 93. 77- 

 Hab. Para. 



21. Trigona lurida. B.M. 



Trigona testacea. Spin. Mem. Accad. Torino, xiii. 93. 76 (1851), 

 (nee Klug). 



Hab. Para. 



22. Trigona stigma. 



Worker. Length 3 lines. — Jet-black ; head vnder than the 

 thorax, the face anteriorly having a silvery pile; the vertex, 

 thorax and legs covered with rigid black pubescence ; wings 

 hyaline, iridescent, nervures fuscous, the stigma yellow. Ab- 

 domen elongate, narrow, smooth and shining. 



Hab, Brazil (Amazons). 



23. Trigona femorata. 



Worker. Length 3i lines. — Head and thorax black ; head 

 wider than the thorax, the clypeus coarsely punctured, the scape 

 ferruginous in front towards the base ; the flagellum fulvous in 

 front. Thorax, a pale line passes over the tegulse, uniting with 

 a pale triangular spot on each side at the base of the scutellum ; 

 wings subhyaline, nervures and tegulse rufo-testaceous ; the 

 thorax at the sides and beneath obscurely testaceous and covered 

 with short cinereous pubescence ; the femora and abdomen be- 

 neath pale rufo-testaceous j abdomen above fuscous, pale testa- 



