390 Bulletin American Museum of Natural History. [Vol. XXXIV, 
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3. Proceratium silaceum rugulosum subsp. nov. 
Worker. Body more heavily rugulose and therefore more opaque than in the 
typical form and darker and more brownish in color. 
Female. (deilated.) Closely resembling the worker and differing from the 
female of the typical form in the same particulars. 
Described from a single female and four workers taken by Mr. Wm. 
Blatchley at Wyandotte, Indiana. The specimens have been compared 
with four cotypes of szlaceum collected by Rev. P. J. Schmitt at Beatty, 
Pennsylvania. 
4. Ectatomma (Parectatomma) hartmani sp. nov. 
Worker. Length nearly 3 mm. 
Head distinctly longer than broad, subrectangular, with rounded posterior 
corners, convex above, a little broader behind than in front, with rather straight sides 
and feebly excavated posterior margin. Eyes a little behind the middle of the sides 
of the head. Clypeus short, rather convex, with its anterior border straight and 
entire in the middle. Mandibles rather long, distinctly triangular, the apical margin 
longer than the basal, not denticulate, meeting the basal margin at an obtuse angle 
which is neither membranous nor translucent. Antennz moderately robust; scapes 
reaching nearly to the posterior corners of the head; first funicular joint as long as 
the two succeeding joints together; second joint as long as broad; remaining joints, 
except the last, broader than long. Thorax above feebly convex, slightly trans- 
versely impressed between the pro- and mesonotum, but without a suture; base and 
declivity of epinotum subequal, the latter concave and sloping, on each side above 
with a small protuberance but neither dentate nor tuberculate. Petiole shorter than 
high, convex and rounded dorsally, a little broader than long, its ventral surface with 
a blunt, compressed projection directed downward and forward. First gastric 
segment narrower and a little longer than the second, with a small, truncated tubercle 
on its anteroventral surface. Legs rather long; hind cox spined. 
Somewhat shining, especially the mandibles, which are covered with shallow 
foveole and striated at the base. Clypeus, frontal area, head, thorax, including the 
epinotal declivity, and the gaster rather finely and regularly, longitudinally rugose. 
Antennal scapes and legs with minute, scattered, piligerous punctures. 
Hairs white, erect, coarse, long and “liuadane covering the body, legs and 
antennal scapes; funiculi with shorter, suberect hairs. 
Body, mandibles and antenne ferruginous red; legs somewhat paler and more 
yellowish. 
Described from a single specimen taken by Mr. Carl Hartman at Hunts- 
ville, Texas. This is the first species of Ectatomma to be taken within the 
boundaries of the United States. Though similar in color and structure to 
the three known species of the subgenus Parectatomma (rastratum Mayr 
