lO^A ACADEMY OF SCIENCES. 
189 
long by 2 mm. broad, slightly narrowed in front of the eyes, 
widening immediately to a spoon- shaped tip, which is thin and 
slightly rellexed. The body color is bright green with four 
equidistant parallel lines extending over head, thorax and scu- 
tellum; the nerves of the elytra and the ovipositor orange red. 
The males are quite different from the females in appearance, 
and were described by Professor Uhler as Glossocratus fenes- 
traius, and have hitherto been regarded as a distinct species. 
They are much smaller, measuring scarcely 8 mm. to the tip of 
the style-like pygofers. 
The head, thorax and basal part of the elytra are marked 
like the female, but the ground color approaches orange. The 
apical half of the elytra and the abdomen are quite different. 
There is a narrow black band just back of the middle of the 
elytra and a broader terminal one, between these is a hyaline 
area with a small curved dark spur extending in on the center 
of the outer margin. The abdomen is annulated with black, 
and the terminal segment, valve and attenuate plates black. 
The larvae are narrow, elongate, closely resembling the female 
in color and in the stripes which extend along the abdomen also. 
The species has been reported from Kansas and New Jersey, 
including only a few specimens in all. There was a specimen 
in the VanDuzee collection from New York, and one specimen 
had been taken at Ames and another at Batavia, Iowa. 
The larvae were found on an isolated patch of slough grass 
{Spartina cynosuroides) early in August. They were then nearly 
full grown. 
The adults were taken in coitu in the middle of August, and 
from then on through September were found in some numbers 
on the limited patch where their food plant occurred. 
It is highly probable that the eggs were deposited in the 
stems of the slough grass before the middle of September, in 
which case the ordinary time of mowing would be an effectual 
remedy, and would account for the rarity of the species in cul- 
tivated areas, or in sections annually overrun by prairie fires. 
PARABOLOCRATUS VIRIDIS UHL. 
(PL xxi, Fig. 1.) 
Olossocratm viridis, Uhler, Bull. U. S. Geol. and Geog. Surv., Ill, p. 462, 1877. 
Parabolocmtiis viridis, Uhler, Stand. Nat. Hist. II, p. 34T, 1884. 
Occnring only on the wild oat {Stipa spartea) this species 
furnishes another example of a jassid confined strictly to one 
species of grass as a host and one to which it is remarkably 
adapted in coloration and life -history. 
