86 
Psyche 
[April 
divergent anteriorly with the anterior area of the head very 
concave or hollowed out. This species seems to be somewhat 
variable in color. In some specimens the soldiers have abdomens 
with the basal segment yellowish, in others there is a faint yel- 
lowish band on the anterior portion of the second segment, in 
still others there is a combination of the two. There is variation 
in the color of the head and thorax, some specimens being much 
lighter than others. The writer hesitates to assign these speic- 
mens to varieties based on color, especially in view of the fact 
that he has not seen material from many localities. 
Colobopsis pylartes fraxinicola subsp. nov. 
Soldier. Length, 4.5-5 mm. 
Head subcylindrical, viewed from above only slightly 
longer than broad, noticeably wider in front than behind, with 
inflated cheeks; occipital border straight or faintly convex. 
Anterior truncated surface oblique, border blunt on sides of face 
and mandibles, on the clypeal and adjacent region the truncated 
passes into the dorsal surface thru a rounded angle. Mandibles 
with blunter ventral margins than those of mississippiensis, 
blade with 4 distinct teeth and a toothless proximal basal por- 
tion. Clypeus projecting above surface of truncated area, 
broader or more divergent above than below. Eyes, frontal 
carinse and antennae as in mississippiensis. Thorax short, 
robust. Meso-epinotal constriction distinct and pronounced. 
The angle formed by the junction of the basal surface of the 
epinotum and the declivity distinct. Petiole low, robust, with 
convex anterior and superior surfaces and flat posterior surface; 
the posterior margin of the superior surface deeply excised or 
emarginate. G aster and legs as in mississippiensis. 
Mandibles and anterior half of head subopaque, the former 
obscurely longitudinally rugose-punctate, the latter regularly 
and coarsely reticulate-rugose with punctate interrugal spaces. 
On the cheeks and front the sculpture gradually passes over 
into umbilicately punctate, shallow, scattered foveolse. Pos- 
terior half of the head and the remainder of body shining, finely 
shagreened. 
