130 Psyche [October 



Colombia: Santa Marta (A. Forel). 

 Panama : (Stretch) ; Bugaba and Caldera (Champion) , 

 Costa Rica (Tonduz) . 



Guatemala: (Stoll); Pantaleon (Champion); Zacapa and 

 Patulul (Wheeler). 



According to Frederick Smith "all the sexes of this species were 

 found by Mr. H. W. Bates in their formicarium, the chambers of 

 which were excavated in dead twigs." The colonies which I found 

 at Zacapa and Patulul were nesting in dead branches lying on the 

 ground in shady places. These branches, 5 to 7 feet long and 1 to 

 1| inches in diameter, together with their twigs, had been tunnelled 

 throughout by the ants. The colonies were very populous, com- 

 prising hundreds of individuals and therefore larger than those of 

 most species of Pseudomyrma. Ps. filiformis seems also to differ 

 from many species of the genus {sericea, triplaridis, arboris-santce, 

 belti, spinicola,flavidula, etc.) in preferring to live in the cavities 

 of dead instead of living plants. There can be little doubt that 

 filiformis is a rare or sporadic species. Dr. W. M. Mann, who 

 collected ants assiduously in Brazil in the region explored by Bates, 

 failed to find it, and although I found numerous colonies of many 

 species of Pseudomyrma in Central Ameria I saw only two oi fili- 

 formis. It seems to me not improbable that the slender, smooth, 

 aberrant female of this ant may start her colony as a temporary 

 parasite on some other species of Pseudomyrma, presumably Ps. 

 fiavidula, which she so strangely resembles in color. 



In his paper on the classification of the Myrmicinse (Intorno alia 

 classificazione dei Myrmicinse, Rend. R. Accad. Sc. Bologna, 1914, 

 p. 34) Emery states that the males of the tribe Pseudomyrmini have 

 13-jointed antennae. This is certainly an error. All the numerous 

 males I have examined of the various genera of the tribe, Pseu- 

 domyrma, Tetraponera ( = Sima auct.), Pachysima and Viticicola 

 gen. nov. (genotype Sima tessmanni Stitz of West Africa) have 12- 

 jointed antennae like the workers and females. 



Forel has described the following variety, which I have not seen, 

 as a variety of Ps. biconvexa: 



