Anfs from British Gui'ona. 367 



Ectatomma (s. str.) tuberculatum, Oil v., '^ . 



Rockstone, 27. 12. 14. 



" An uncommon species, and apparently only met with in 

 the interior districts." 



Tribe Ponekini (Forel). 



Subtribe Pachycondylini, Ashmead. 



Neoponexa (s. str.) villosa, F., subsp. inversa, Sm., ^ . 

 " Not a common species. Formicary observed on two 

 occasions in a hole in the trunk of a Cacao-tree. The 

 communities were not large, consisting of about 500-600 

 individuals. The species seems to occur more commonly in 

 the interior districts.^' 



Pachycondyla (s. str.) crassinoda, htr., '$ . 

 Botanic Gardens, Georgetown, 27. 5. 15. 



Pachycondyla (s. str.) harpax^ F., ^ . 

 Issororo, N.W. District, 12.6.15. 



Tribe Odontomachini (Mayr.). 

 Anochetus (^Stenomyrmex) emargiiiatus, F., ^ . 



" A fairly cotnmon species. Formicarium, which seldom 

 consists of more than 100 individuals, is frequently found in 

 decayin<^' vegetable matter beneath the dead sheathing leaf- 

 bases of several species of indigenous palms." 



Issororo, 3. 6. 15. 



Odontomachus hcematoda, L., $ . 



The single specimen has the node evenly striate all round, 

 as in the var. rugisquama, For., from Costa Rica and 

 Columbia, but not so coarsely. 



Georgetown, 11. 5. 15. 



0. hcematoda, L., var. laticeps, Rog. ?, ^ . 



A single specimen in a tube containing Pachycondyla 

 harpax, F. It answers very well to the description of 

 Roger, but in the absence of more material I place it with 

 hesitation under var. laticeps. 



Issororo, 12. 6. 15. 



25* 



