SAY’S LEAFHOPPER. . 85 
rather short in many cases, exposing the tip of the abdomen beyond 
the ends of the wings. They are dark brown in color with distinct 
light markings and a fairly distinct band across the wing-base and 
again back of the middle of the fore-wings. They are a trifle more 
than one-eighth inch in length. 
The nymphs (fig. 20, g) are rather slender and have a quite distinctly 
angular head colored much as in the adult, but the arrangement of 
the markings is different. There is a narrow middle line of white 
extending from the tip of the head to, the end of the abdomen, where 
it widens and nearly covers the tip. There is a broad stripe extending 
along the side from the eye back to near the tip of the abdomen and 
an indistinct narrow one from the inner margin of the eye broken by 
white spots, one on the hind edge of each abdominal segment; there 
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Fic. 19.—Map showing distribution of Deltocephalus sayi. (Original. ) 
is a second row of dots midway between the first and the marginal 
stripe on each side. In Iowa the nymphs were first found in small 
numbers on upland prairies the second week in June. They were full 
grown and probably somewhat later than the average as the adults 
had been taken during the first week of June and occurred in great 
numbers in watered pastures by the middle of the month. The adults 
were abundant from that time on through the season, but nymphs were 
again found on July 11 about half grown and full grown by the latter 
part of July along with fresh-looking adults. Nearly full-grown 
nymphs were again seen on the 5th of September and later in the 
month they were becoming rare while the adults were still plentiful. 
The adults probably survived some time after egg deposition, so that 
there is a continuous occurrence of adults to be noted throughout all 
of the latter part of summer. Egg deposition probably occurs in 
early October, as dissected females showed no signs of eggs the latter 
