ak 
252 THE AMERICAN NATURALIST. [VOL XXXII. 
of the Coriidze (Hormostes reflexulus) of which we have a speci- 
men in which the trachez are distinctly visible within the well- 
developed veins (Fig. 23). 
At the base of the wing the costa is remote from the costal 
edge of the wing, but approaches it near the middle of the 
aag aoe 
Fic. 23. — A Coreid, fore wing, adult. 
thickened portion. The subcosta and radius coalesce to a point 
beyond the middle of this part of the wing, where the radial 
sector separates, making its characteristic curve. Vein Ax is 
wanting. Media, cubitus, and the first anal vein extend in 
nearly direct lines to the membrane. 
The most important feature of the venation is the coalescence 
of subcosta and radius, a feature that occurs in many families 
of Hemiptera. 
But the most important features to be observed are the posi- 
tions of the furrows of the wing. Here the median furrow is 
in its typical position between radius and media. In the Penta- 
tomids that we have studied it is more closely parallel with 
the radius and extends across the radial sector, showing that 
its position is not determined by the course of the veins. The 
anal furrow is infront of the cubitus instead of in its more usual 
position, behind this vein. In fact, in all of the Heteroptera 
that we have examined, when an anal furrow is distinctly devel- 
oped it is in front of the cubitus. 
Much remains to be done in tracing out the homologies of 
the wing-veins of the Hemiptera. But we feel that a good 
beginning has been made, one which will serve as a sure basis 
for future studies. 
