66 
LEAFHOPPEES AFFECTING CEEEALS, ETC. 
the principal ones so far appearing, but it is listed also from Nebraska 
and a specimen from Wellington Kans., in the bureau collection evi- 
dently belongs here. 
"It is single brooded, the adult appearing about the middle of May 
and continuing in decreasing numbers until the end of July. During 
the last week in May and the first week in June the eggs are deposited; 
the female selects a spot about 2 inches above the base of the first 
or second leaf from the bottom; having selected the spot apparently 
with much care, she takes her position head upwards, legs placed 
Fig. 7.— The shovel-nosed leafhopper (Doryccphalus platyrhynclius): a, Female; b, male; c, face; d, female 
genitalia; e, male genitalia; /, eggs in grass stem; g, eggs; h, egg, more enlarged and showing developing 
nymph; i,j, k, I, different stages of growth of nymph. All enlarged. (After Osborn and Ball.) 
close together and tarsi clasping the stem; then, raising the body the 
length of her legs and curving the abdomen upward, she unsheathes 
the ovipositor from the pygofers and brings its tip down against the 
grass stalk, pointing backward slightly from the perpendicular; she 
then moves slowly around the stem, keeping the body parallel with 
it and the guides pressed firmly against it until they catch under the 
edge of the encircling leaf sheath; having done this they are gradually 
forced under the sheath, usually extending almost half way round 
the stem. As they are gradually forced in, the abdomen straightens 
and then hollows until, when the ovipositor is fully inserted, the 
abdomen is curved down, and the pygofers are pointed upward and 
backward at more than a right angle with the guides. Having 
reached this position she works slowly backwards, opening the sheath 
