4 



BULLETIN 254, U. S. DEPARTMENT OF AGRICULTURE. 



ecutel greenish-yellow; hemelytra green; nervures paler; exterior and apical margins 

 pale yellow or whitish; a pale yellowish, capillary, oblique line from the humerus 

 to the inner margin; tergum black-purple, lateral edge and tip yellow. 



Length to the tip of the hemelytra over three-tenths of an inch. 



A common species. 



A simple description which will enable the farmer or uninitiated to 

 recognize the species in its several stages is given below: 



ADULTS. 



(Fig. 1, a-f.) 



Color bright grass-green, head very sharply pointed, of a slightly 

 lighter green than body. Face marked with oblique lines. Males 

 noticeably smaller than females, and with black venter. Venter of 

 female lighter than wing covers. 



(Fig. 1, I.) 



The eggs are white; when first deposited they are rather trans- 

 parent, later becoming opaque. They are irregularly elongate in 

 form, comparatively blunt at both ends, and about three times as 

 long as wide. The head end of the egg is somewhat bulging. Eyes 

 of the immature nymph show through the eggshell as red spots a 

 few days before hatching takes place. Table I, taken from the notes 

 of Mr. V. L. Wildermuth, an assistant of the Bureau of Entomology, 

 gives the egg measurements. 



Table I. — Measurements of eggs of the sharp-headed grain leaf hopper . 



Egg. 



Length. 



Maximum 

 width. 



Minimum 

 "width. 



1 



Mm. 

 1.40 

 1.25 

 1.40 



Mm. 

 0.35 

 .40 

 .40 



Mm. 

 0.15 

 .10 

 .125 



2 





Average 



1.35 



.38 



.125 



NYMPHS. 



(Fig. 1, g-j, I.) 



In general the nymphs resemble adults in shape and color, the most 

 noticeable difference being in absence of wings and wing covers, and 

 in size. 



First-instar nymphs (fig. 1, I). — Color light yellow-green, uniform 

 but somewhat darker on dorsal side of last two abdominal segments. 

 Legs a cottony white. One dorsal stripe of lighter yellow running 



