208 Psyche [December 



Head suddenly constricted behind, without a neck or with a short 



neck, the posterior edge of which is not reflected or expanded 4 



2. Petiole scarcely more than twice as long as broad; joints 2-9 of the 



funiculus not or very slightly longer than broad 3 



Petiole three times as long as broad; all the funicular joints distinctly 



longer than broad. Length 6-6.5 mm. Trinidad urichi Forel. 



3. Neck rather short and but slightly reflected at its posterior edge; 



funicular joints 2-7 not longer than broad. Length 3.5-4 mm. 



Brazil pilosum Mayr. 



Neck longer and more distinctly reflected at its posterior edge; funi- 

 cular joints 2-Tlonger than broad; antennge and petiole more slender; 

 hairs on body and^legs longer and less appressed. Length 4.6 mm. 

 Costa Rica collare Emery. 



4. Head without a neck. Length 3.5 mm. Buenos Aires steigeri Santsche. 



Head with a short but distinct neck 5 



5. Postpetiole longer than broad; body slightly shining, dirty brown, 



with ochre yellow antennae, mandibles and legs. Length 3.2-3.5 



mm. Brazil moelleri Forel. 



Postpetiole broader than long, body opaque 6 



6. Ridges on meso- and epinotum feebly developed 7 



Ridges on meso- and epinotum strongly developed 8 



7. Funicular joints 3-7 a little longer than broad. Length 6 mm. Costa 



Rica robustum Emery. 



Funicular joints 3-7 broader than long. Length 3.4-3.5 mm. 

 Trinidad mayri Forel. 



8. Ferruginous; body indistinctly reticulate-rogose; first gastric seg- 



ment with well developed lateral ridges; posterior diverging 

 portions of frontal carinse longer than the lobes; hairs on an- 

 tennal scapes and tibiae curved at the base. Length 3.5-4 mm. 



Brazil wasmanni Forel. 



Black or dark brown; body more distinctly reticulate-rugose; first 

 gastric segment without lateral ridges; posterior diverging por- 

 tions of frontal carinse shorter than the lobes; hairs on antennal 

 scapes and tibiae not curved at the base. Length 3.5-4 mm. Costa 

 Rica calverti sp. nov. 



