ANTS FROM HONDURAS AND GUATEMALA. 



By William M, Mann, 



Of the Bureau of Entomology, United States Department of Agricxilture. 



INTRODUCTION. 



Most of the ants listed and described in this paper were collected by 

 the writer during February and March, 1920, in Honduras, chiefly 

 along the coast and in the near-by mountains between Ceiba and Tela. 

 A few species from Guatemala, given to me by Prof. AV, M. Wheeler, 

 are included. 



With the exception of Eciton morosus^ var. ixLyaruni Forel, there 

 are, as far as I can find, no previous records of ants from Honduras. 

 The object of my visit was chiefly economic ; not a great deal of time 

 could be devoted to ant collecting and most of such time was spent in 

 the deep woods overturning stones and logs, so the majority of the 

 species noted are from these situations, and the collection therefore 

 lacks many forms which would have been taken had more attention 

 been paid to twig-dwellers and other tree-inhabiting ants. 



Among the more interesting species described are a new Thauma- 

 tomyrmex and an Acarithognathus, both genera new to the Central 

 American fauna and known before only by one South American 

 species each, a new genus {0 pisthoscyjjhus) ^ related to Alfana, and 

 two aberrant myrmecines which I place, provisionally, in the genus 

 Ste7iam7Jia. 



I am much indebted to the Vacarro Brothers of New Orleans and 

 Ceiba, who furnished steamship passage from New Orleans to Ceiba 

 and return, as well as transportation on their railroad in Honduras 

 and accommodations at several of their plantations and to the officials 

 of the United Fruit Company for similar courtesies and assistance on 

 their estates. 



Professor Wheeler kindly gave me the freedom of his collection for 

 comparison and Professor Emery examined and compared with types 

 in his collection several species of which I was doubtful. 



DESCRIPTION OF SPECIES. 

 Subfamily Cerapachinae. 



CERAPACHYS (PARASYSCIA) HONDURIANUS. new species. 



Worker. — Length 2.75-3 mm. 



Head one-fourth longer than broad, a little broader behind than in 

 front, with slightly convex sides and broadly and shallowly concave 



No. 2434.-PROCEEDINGS U. S. NATIONAL MUSEUM. VOL. 61. ART. 13. 



