216 MAIN£ STATE COLLEGE 



pair separated behind by a narrow, black line, confluent in 

 front, the inner stripes shorter. Scutellum, elevated, flat, white 

 above with black sides and base. Bristles of the thorax and 

 scutellum black. Balancers three jointed, outer joint black, prom- 

 inent, irregularly triangular, basal joints brownish. 



Abdomen a little longer than broad. Length, 2.22 to 2.3 mm. 

 (.088 to .092 in.) without the ovipositor. Black, ovate, composed 

 of seven segments. First and second segments rapidly widening. 

 Second segment widest. Sixth segment abruptly narrowed, 

 shorter than the fifth, and apparently rudimentary and represented 

 below only by a narrow sternite. Seventh segment truncate at the 

 end, when the sheath and ovipositor are retracted, but sloping into 

 the sheath when it is protruded. Posterior portion of the second, 

 third, fourth and fifth segments (occasionally the sixth) broadly 

 banded with white. 



Ovipositor — Length, 1.33 mm. (.053 in.) ; breadth .33 mm. 

 (.0133 in.) at the middle where it enters the sheath, broadest at 

 the base, tapering from where it leaves the sheath to a sharp point 

 somewhat curved (usually upward) at the end. (See Plate II, 

 Figure 1.) Brownish, hornlike, bearing a median groove below, 

 which is covered by two flaps which extend half way from the 

 sheath to the point. These flaps are covered by a shorter median 

 one. From beneath the flaps the eggs escape. In specimens 

 mounted in balsam the oviduct and ovipositor show within the 

 sheath to its base. 



Sheath of the ovipositor .67 mm, by .233 mm. ( 027 in. by .009 

 in.) ; oblong, largest at the base, then narrowing, widening again 

 in the middle, narrowing again and at the lower end widening into 

 a terminal ring. Truncate at the end. Beautifully marked above 

 and below by oblong tubercles arranged in about fifteen oblique 

 rows, beginning at the base of the sheath and sloping backward 

 each way from the median line above and below. The rows from 

 above and below meet each way on the sides at an angle. A tri- 

 angular space on the sides at the base and above not tuberculate. 

 The tubercles become smaller and less conspicuous toward the 

 sides. (See Plate II, Figure 1 ) 



Legs about 3.75 mm. long (.15 in.) Femora and tibise about 

 equal, 1.5 mm. (.06 in.) Tarsi shorter, .75 mm. (.03 in.) Femora 

 black with yellowish distal and proximal ends. Front pair lighter, 

 with hind sides more or less dark. Proximal joints of all the tarsi 

 ar^d tibise clay yellow. Distal joints of tarsi all clothed with c|arH 



