90 Psyche [August 
When cleared of the body fluids the chitin is found to be marked 
as follows: The head, thorax, antenne, cornicles and legs are 
marked as indicated above. The abdomen becomes clearly trans- 
parent with the exception of a row of rather large black patches on 
each lateral margin, each patch surrounding a spiracle. The 
cauda, and genital plates are likewise dusky. In some specimens 
one or two narrow dusky bands are present caudad of the cornicles. 
Apterous Vivipara. 
The apterous viviparous forms occur upon the sedges during 
most of the year. They produce large numbers of young, some of 
which become alate and others continue the apterous lines through- 
out the summer. 
Fifth instar (adult). General color dark greenish black, some 
specimens dull while others are glossy. Antennz, eyes and corni- 
cles black. Distal extremities of the femora and tibie and the 
tarsi black, remainder of the legs yellowish. When mounted in 
balsam the abdomen appears greenish in color, and when cleared 
the abdomen and thorax are transparent with the exception of the 
cauda, anal and genital plates and small dots along the sides of 
the abdomen. Measurements of the appendages are given in 
Table II. 
TABLE II. MEASUREMENTS OF ANTENNZ AND CORNICLES OF 
APTEROUS VIVIPARA. 
Segment III. | Segment IV. Segment V. Segment VI. Cornicle. 
0.288 mm 0.192 0.16 (0.064+0. 384) 0.288 
0.272 0.192 0.176 (0.084+0.4  ) 0.288 
0.288 0.176 0.176 (0.08 +0.416) 0.272 
0.32 0.176 0.176 (0.096+0 432) 0.288 
OVS2 0.176 0.176 (0.096+0 .432) 0.288 
0.272 0.176 0.16 (0.08 +0.416) 0.272 
0.256 0.192 0.176 (0.08 +0.432) 0.272 
0.304 0.192 0.176 (0.096-++0 .368) 0.272 
0.256 0.192 0.176 (0.096+0. 368) 0.288 
0.272 0.176 0.16 (0.08 +0.384) 0.272 
