No.411.] MALES OF SOME TEXAN ECITONS. 163 
this region ; posterior angles only moderately projecting ; ante- 
rior portion with sparse pile, posterior edges, and especially the 
posterior angles, with rather long, dense, and appressed ful- 
vous pile; ventrally the pile is thin and more erect. Abdo- 
men cylindrical, subopaque above (except at the subconstricted 
posterior edges of the segments which, like the venter, are 
glabrous), covered with minute piligerous punctures ; pile on the 
dorsal surface of the segments short and appressed, especially 
towards the base of the abdomen, posteriorly and on the ven- 
ter, especially in the region of the hypopygium, it is longer and 
more erect. Hypopygial plate shining with two short, slightly 
recurved teeth at its tip. Legs rather small and feeble, pos- 
terior pair not reaching to the end of the abdomen. Middle 
metatarsus a little more than half as long as the middle tibia. 
Coxze, femora, and tibize shining, with rather erect fulvous pile, 
pile on the tarsi short and appressed. Tibial spurs red, claws 
with extremely rudimental denticles. Wings clothed with 
minute black pile, anterior pair reaching to the tip of the 
abdomen. For venation see Fig. I. 
On October 27 the junior author was so fortunate as to dis- 
cover a flourishing colony of E. ofacithorax Emery under a 
large stone in a dilapidated wall at the edge of some woods, on 
the sloping banks of Shoal Creek at Austin. This colony also 
contained a great number of males but was ransacked in vain 
for a queen. The workers had stored their nest with a 
considerable number of small carabid beetles that had evi- 
dently been captured on one of their marauding expeditions. 
E. opacithorax is considerably smaller and appears to be some- 
what rarer in this locality than E. schmitti. We insert a 
description of the male, which, like the male of schmitti, 
as a species of Labidus. 
appears to have escaped description 
i : Length of body, 
Eciton opacithorax Emery (Fig. 2, €) male. 
10-11 mm. ; length of fore-wing, 8-9 mm. "oh 
Body glabrous throughout ; head, thorax, petiole, first abdom- 
and tibiae, black; lateral and 
inal segment, venter, femora, Sons 
dorsal regions of abdomen, including the posterior edge ot the 
inner edges of mandi- 
first abdominal segment, hypopygium, | 
bles, knees, and tarsi, dull red. Antenna usually black, but 
