Catalogue of the hymenopterous insects in the collection of the British Museum. Part VI. Formicidae. Author Smith, F. text 1858 British Museum London http://antbase.org/ants/publications/8127/8127.pdf book 8127 C86CFDBF-61D9-48EE-9C2E-325FC0462B10 9 . Eciton pachycerus . B.M. Worker. Length 2 lines.-Chestnut-red: smooth and shining. Antennae short and very stout, shorter than the thorax. Thorax anteriorly shining, the metathorax opake 5 the nodes of the peduncle incrassate, subglobose; the femora very slender at the base, and incrassate towards their apex; entirely destitute of pubescence. Hab. South America? (Coll. Gen. Hardwick.) This species is the only one of the genus which is apparently quite destitute of eyes; in E. legionis and E. pilosa they are extremely minute, but we have failed, even with the aid of a powerful microscope, in our endeavours to discover them in this species.