812 
ANNUAL REPORT OF NEW-YORK 
SAY’S HETEROFTEROUS UEMIPTF.RA. 
species being muck more regular and wider on the inner ante¬ 
rior margin than on other parts of the hemelytra. The thorax 
and hemelytra also of that species are minutely rugulose. Pass¬ 
ing through the market in the city of Mexico I obtained a few 
specimens from the quantity of at least a peck, exposed for sale 
by an Astec woman They are made use of as food. 
It is larger than calva, Nob. and further distinguished by the 
immaculate base of the hemelytra. 
Notonecta, L. Latr. 
1. N, undulata, Whitish; scutel and band blackish. 
Inhab. Missouri and Indiana. 
Body greenish-white: thorax dusky or blackish behind: scutel 
velvet black, a slight dull fulvous spot each side near the base 
and another more or less dilated, at tip: hemelytra with an 
undulated, fuscous band behind the middle ; tip simply emargi- 
nate, not fissile: beneath, blackish, varied with yellowish: feet 
greenish. 
Length two-fifths of an inch. 
Var. A. Small spots at base of the scutel, none. 
This approaches the description of N. americana , F. which, 
however is said to be ’’postice nigro” corresponding with speci¬ 
mens in my cabinet from Mexico. The black color of tho 
posterior portion of tho thorax is only transmitted from the 
part of the scutel which is beneath it. 
Var. B. Yellowish, or greenish white; beneath varied with 
blackish and yellowish: feet green: hemelytra with three 
lateral, longitudinal brown spots; a lateral, submarginal black¬ 
ish line. 
Var. C. Scutel black: hemelytra blackish with a line at base 
and tip whitish. 
Inhab. Mexico. 
This may possibly prove to bo a distinct species, but as it 
possesses many characters in common with the undulatus, I 
refer it for the present to this species as a variety. I owe it 
to the kindness of Mr. Ma[c]lure; it forms part of the 
taken by William Bennett. 
I found an individual in Missouri that appears to hi 
as Var. C. 
