No. i.] A STUDY OF SOME TEXAN PONERINAE. 31 



congener. Two specimens of the very singular little ant, 

 Strumigenys louisianae Rog., were also taken from the earth of 

 this same nest. Their relations with the Pachycondyla were 

 probably of a more accidental nature. The other forms taken 

 are pleomyrmecophilous, i.e., they occur in the nests of several 

 other species of ants in the vicinity of Austin. These are, 

 first, a yellowish white species of Lepismina, quite common in 

 the nests of Pachycondyla, but even more abundant in the 

 nests of Camponotus castancns Latr., in the same localities. 

 This Thysanuran was also taken in the nests of Eciton coecum 

 Latr. Second, a white Collembolan, similar to, if not the same 

 as, Cyphodeira (Beckia) albinos Nicol. of Europe. This insect 

 is panmyrmecophilous, occurring in the nests of nearly all the 

 ants of Travis County. Third, Myrmecophila ncbrascensis 

 Bruner, rare in the nests of Pachycondyla, but very common 

 in the nests of Formica fusca, var. neorufibarbis Mayr. I have 

 no doubt that this singular little cricket had strayed from the 

 Formica to the Ponerine nests. Fourth, a small Trichoptery- 

 gid beetle was sometimes found in the nests of Pachycondyla. 

 As this same species was very common in the nests of Campo- 

 notus castaneus, in the same localities, I believe that it, too, 

 may have strayed from the nests of its typical host. 



UNIVERSITY OF TEXAS MEDICAL SCHOOL, 

 GALVESTON, June 10, 1900. 



