No. 411.] MALES OF SOME TEXAN ECITONS. 159 
$ Labidus. sayi Hald. Stansbury’s EZxplor. of Utah (1852), p. 367, Pl. IX, 
‘igs. 1-3. Emery, Zec. cif. (1900), p. 9. 
P. Labidus servillei Nestw. Arcana. Ent., vol. i (1842), p. 75 tome xx, Figs. 2, 
2a; Emery, Bull. Soc. Ent. Ital., vol. xxii (1890), p. 39; Emery, Nuovi 
Studi, etc., Joc. cît. (1900), p. 9. 
& Labidus jurinei Shuck. Emery, doc. cit. (1900), p. 9. 
$ Labidus smithi Dalla Torre. Emery, loc. cit. (1900), p. 10. 
4 Labidus pilosus F. Sm. Emery, oc. cit. (1900), p. 10. 
$ Labidus fulvescens Blanch. Emery, loc. cit. (1900), p. I0. 
4 Labidus atriceps F. Smith. Emery, loc. cit. (1900), p- 16. 
Both before and since learning of André’s conclusion we 
have sought diligently but in vain for the female of Eciton 
cæcum in-the vicinity of Austin, notwithstanding the species 
is so common that we rarely spend a few hours collecting 
and observing ants without happening on two or three of its 
colonies, These are found, as a rule, under clusters of stones 
which lie with their edges in mutual contact. But as the 
species is entirely subterranean it is not an easy matter to 
find the breeding chambers. The narrow burrows run along 
under the stones for some distance and then dip down into the 
soil. Frequently the galleries are found under large stones 
that have fallen from stone walls, and in these cases the bur- 
rows almost invariably extend under the wall where they are 
inaccessible to the observer. For several days after a rain 
E. cecum may often be found under the stones in open fields, 
but during dry weather it seems to prefer the more sheltered 
and therefore moister localities. The males of E. caecum, 
which may be readily identified by the aid of the table in. 
Emery's latest paper, are common about the electric lights 
at certain times of the year. Messrs. Melander and Brues 
took them in considerable numbers on March 27, less fre- 
quently on April ro and 20 of the past year. All of these 
specimens are referable to Labidus sayt, although somewhat 
exceeding the dimensions of the specimens described by 
Haldemann. : 
Eciton cecum, which may be regarded as the typical species 
of the genus sensu stricto (workers with denticulate claws), 1s, 
as we have said, the only Eciton of which the male, female, 
and worker phases are all described. In the present paper 
