346 bulletin: museum of comparative zoology. 



ocelli large, the former nearly half as long as the head; cheeks long 

 and straight. Antennae 13-jointed, scapes fully f as long as the 

 funiculi; first joint of the latter cylindrical, scarcely longer but dis- 

 tinctly thicker than the second. Thorax, petiole, and gaster much as 

 in Camponotus; the external genitalia also very similar, their valves 

 slender and exserted. Wings with the discal cell very small and 

 triangular, sometimes wanting. 



Table for the identification of the workers. 



1. Head largely black or dark brown 2 



Head entirely yellow or with only the vertex and occiput black . 10 



2. Thorax black or dark brown, without yellow markings 3 



Thorax wholly or in part yellow 5 



3. Head and body very slender, subopaque, and sharply shagreened. 



Length 6 mm maurus, sp. nov. 



Head and body shorter, shining. Length 3-5 mm 4 



4. Thorax and first gastric segment brown lienosus, sp. nov. 



Upper portion of first gastric segment ivory yellow. 



respiciens Sm. var. moestus, sp. nov. 



5. Thorax and legs partly black 6 



Thorax and legs entirely yellow rvfithorax Emery. 



6. Yellow of thorax of a whitish or ivory tint. . . . respiciens Smith. 

 Pale portions of thorax orange-yellow 7 



7. Epinotum more or less yellow above 8 



Epinotum black 9 



8. Pro- and mesoepinotum yellow above an oblique line running 



from the ventral border of the pronotum to the epinotal angle. 



pictns Emery. 

 Only the ventral portion of the meso- and epinotum black. 



pictns var. palliatus, var. nov. 



9. Only the pronotum yellow. . . .pictns var. himacnlaius, var. nov.' 

 Both the pro- and mesonotum yellow above. 



pictns var. lepidus, var. nov. 



10. Pronotum with a conspicuous arc of erect hairs; epinotum low 



and bluntly angular major Forel. 



Pronotum without erect hairs; epinotum higher and more 

 sharply angular 11 



11. Gaster entirely black haddoni subsp. rufoniger Forel. 



Gaster more or less yellow 12 



