78 NINETEENTH REPORT STATE ENTOMOLOGIST OF MINNESOTA—I9Q22 
anterior half but smaller than the corresponding spots in the adult; 
basal margin of pronotum blackish but not extending to lateral angles, 
also broken at median line by pale. Wing pads greenish black, outer 
margins broadly pale; mesonotum with a large pale area which sep- 
arates the wing pads at base. (Plate I.) 
The males are usually smaller than the females and can be separated 
by differences found .in the genital segments. The greenish black 
chitinized areas along median line of the tergites, the mediodorsal plates 
of Hart (1919), each contain a transverse, curved suture connecting 
laterally with the orifice of a scent gland. The first suture, near the 
posterior margin of the third tergite, has at each lateral extremity 
a minute and perhaps nonfunctional orifice. The fourth and fifth 
tergites have more prominent sutures and the lateral extremity of each 
bears a well developed orifice, apparently connected with a functional 
scent gland. The fourth mediodorsal plate bears a suture but this is 
probably without functional glands. 
The adult. Male, length 8.6 to 10 mm., width at base of pronotum 
5 to5.5mm. Female, length 10.5 to 11.5 mm., width at base of prono- 
tum 6.4 to 6.7 mm. 
Subelongate, somewhat broadly ovate; lateral margins of abdomen 
visible from above, broad at middle and rounding sharply to apex. 
Dorsum glabrous, smooth except for punctures. Head rather densely, 
irregularly, and coarsely punctate; tylus and juga of equal length, the 
former with a prominent subapical concavity, cuter margins of juga 
moderately elevated. Rostrum reaching upon intermediate coxae. 
Antennae: Segment I, length 0.41 mm., thickness 0.166 mm.; II, 
T.05 mm., distinctly compressed and uniform in thickness, greatest 
diameter 0.111 mm.; III, 0.83 mm., apex 0.17 mm. thick, slender at base 
and gradually thickened to apex; IV, 1.11 mm., 0.166 mm. thick, nearly 
cylindrical, slightly more slender at base and apex; V, 1.22 mm., 
0.166 mm. thick, cylindrical, tapering to slightly more slender at base 
and apex. 
Pronotum deeply, irregularly, and in places sparsely punctate; trans- 
versely across middle of disk and between catli, sparsely punctate. 
Lateral margins slightly sinuate, rather distinctly concave at middle, 
anterior angles with small but apparent tubercle; basal angles bluntly 
angulate, nearly forming right angles. Scutellwm more nearly flat 
than in circumeinctus; basal half sparsely punctate except on black 
area each side of median line, apical half rather closely and more finely 
punctate. Pleurites of thorax coarsely, deeply, and irregularly punctate. 
Ostiolar peritreme slightly elevated, shining, narrowly surrounded by 
