-XXI, 20] ENTOMOLOGICAL NEWS 225 
from the slightly rougher lateral areas by a margined sulcus which begins 
at the basal angle and follows the basal margin for about one-fifth the 
width of an elytron, then, turning at nearly a right angle. crosses the 
prothorax diagonally with a slightly sinuate course to its inflexed tip, 
where it dies out before reaching the apical margin; parallel to this sulcus 
and on the lateral margin of the disc is a broad shallow groove which at 
its basal end forms a broad foveate depression, is constricted at its middle, 
and broadens again at its shallow apical end; lateral area narrowest at 
base, widening to apex and divided at basal third by a broad foveate 
depression which is not a distinct groove as in other species of the genus 
examined by me; apical portion of lateral area has about eight setigerous 
punctures irregularly placed, the included setae reddish yellow and de- 
pressed; the basal portion of this lateral area is moderately tuberculate 
and has about six setigerous punctures; thoracic lateral margin bordered 
with six to eight black setae unequally spaced. 
Elytra smooth, shining, slightly wider than thorax, about as wide as 
long, sides slightly arcuate, distinctly rounded posteriorly; first stria 
_from the elytral suture reaching three-fourths of length of elytra, with 
two setae at basal end, none at tip; second stria nearly reaching apex, 
two setae at base and five along apical end; third stria not quite reaching 
apex, with an increasing number of setae from base to tip; subhumeral 
stria not quite reaching apex, with fairly evenly spaced hairs throughout 
its length; interspaces and disc smooth, shining; a row of setae on apical 
margin. 
Pygidium and propygidium smooth, shining, moderately, evenly punc- 
tured, each puncture bearing a subulate seta. 
Prosternum rugose, flattened, margined area on caudal end reaching to 
one-half its length, margin sinuate between the coxae, beyond arcuately_ 
convergent and meeting, completely enclosing the cephalic end of mar- 
gined area which is smooth and shining. 
Legs smooth, shining, sparsely punctured, punctures with setae, hind 
tibia not much wider than femur. 
Meso- and metathoracic segments and abdomen smooth, shining with- 
out punctures. Length 1.5 mm. 
Described from four examples; type in my own collection, 
from Mill Valley, Marin County, California; paratypes in 
the collection of Dr. E. C. Van Dyke, who kindly loaned 
them to me for comparison. 
My specimen was taken from the nest of a small grey ant 
while those of Dr. Van Dyke came from the nest of a much 
‘larger species. 
(To be Continued) 
