96 
April 10, on Capsella bursa-pastoris, attended by Formica fusca 
gagates; April 11, on roots of blue-grass in edge of corn field, 
with Lasius interjectus; April 23, from a nest of Lasius; April 
28, in blue-grass sod, attended by Lasius niger; April 30, in a 
pasture, with Lasius niger; May 7, in a corn field; May 31, on 
roots of corn, on sod ground, attended by Lasius. 
It will be seen that t^hese collections have all been made in 
early spring, and with but two exceptions in the month of April. 
The life history of this species is thus unknown. 
DESCRIPTION.* 
Wingless Viviparous Female. —Body oval or ovate, smooth, 
uniform light glaucous green, sutures not conspicuous, body 
and appendages sparsely covered with fine and rather short 
hair. 
Head rather broad and subtruncate in front, width at base 
about twice its length. Antennae distant, each in a short broad 
groove or impression, five-jointed in the mature individual, 
moderately long and slender, attaining the sides of the meta- 
thorax, slightly darker than the body, fifth joint and apex of 
fourth pale brownish; joint I about twice as thick as III, its 
posterior side about equaling its basal diameter; II a little 
longer and more slender, about twice as long as thick; III the 
most slender and much the longest joint, being nearly twice as 
long as I and II combined; IV and V about equal, each longer 
than II, and combined about three fourths as long as III, spur of 
Y tapering, short, extending beyond thesensorium about as far 
as the diameter of V at base. On the lower side of the apex of IV 
is a large round seusorium, and at the base of the spur of V is 
an extremely large one, semicircular or sublunate, fully as wide 
as the diameter of III, strongly convex, glassy and apparently 
transparent when looked through in profile. Two or three mi¬ 
nute sensoria adjoin it on the distal side, next the spur. On 
one antenna there is an additional sensorium on IV towards 
the base. Eyes moderately large, placed near the posterior 
angle of the head, ocular tubercle broad and rather high, show¬ 
ing in alcoholic specimens three oval lenses, their long axes radi¬ 
ating from the apex of the tubercle. 
Prothorax set off from remainder of body by a slight con¬ 
striction or deepening of the suture, and usually showing an 
oblique impression on each side above. Remaining body seg¬ 
ments without distinct markings or structures above, gradually 
shorter to posterior extremity. Eighth segment, cauda, and anal 
plate pale brownish, the former small and short, the cauda re¬ 
duced to a subtriangular plate on the upper surface of the anal 
plate, the latter one half longer than the cauda and as long as 
the seventh segment, semiglobular, minutely scabrous, clothed 
with fine short hair, a white line adjoining the apical margin of 
the cauda. 
