IOWA ACADEMY OP SCIENCES. 
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B, Hyaline areas distinct, outer discoid cell its own width from 
margin. 4~notata Say. 
BB. Hyaline areas indistinct, outer discoid cell not more than half its 
width from costal margin. angulata n. sp. 
AA. Elytra elongate, rounding behind, the outer margin broadly curved, 
without trace of hyaline costal areas; usually with front inflated 
and the pronotum elevated. 
B. Front inflated and produced, meeting the vertex in nearly a 
right angle; elytra strongly convex, species large, dark. 
C. Front much produced, extending distinctly beyond the tylus, 
to which it rounds back; ovipositor long. parallela Say. 
CC. Front not extending beyond the vertex, pygofers and ovi- 
positor short, the latter scarcely exserted. 
B. Front meeting the vertex at a right angle; plates attin- 
gent, finger-like. permutata Uhl. 
HD. Front meeting vertex at a slightly acute angle; plates 
broad and sfiort, divergent. irrorata n. sp. 
BB. Front moderately flat, meeting the vertex at an acute angle; 
species smaller, narrower, lighter colored. 
C. A broad, white median stripe on vertex and pronotum; face 
and vertex making an angle of about 50 degrees; pygofers 
long, narrow, ovipositor exserted; plates short, consisting 
of two rounding lobes saratogensis Ph. 
CC. At most a narrow, light stripe on vertex, not extending on to 
pronotum, face and vertex making an angle greater than 50 
degrees; pygofers short, ovipositor scarcely longer; plates 
acute, divergent. 
H. Pronotum and elytra strongly maculate, plates divergent 
from base, suddenly narrowed before the apex. 
annulata n. sp. 
HH. Pronotum and elytra nearly unicolorous; plates attingent 
at base, divergent before the apex, regularly narrow- 
ing signoretii Ph. 
APHROPHORA QUADRINOTATA Say. 
A. quadrinotata Say. Jour. Acad. Nat. Sci. Phil. VII, p. 304, 1831. 
Dark grayish -brown, with two large hyaline areas on the 
costal margin of each elytron; closely resembling the 
European A. alni in color and marking, but much smaller and 
with a longer vertex; length 7-8mm., * width 8-3. 5mm. 
Vertex nearly flat, one-half longer on middle than at eye, anterior 
margin rounding, the edge sharp, posterior margin broadly angulate with 
a distinct notch, median oarina distinct; front scarcely inflated, the infla- 
tion being about half the length of the long diameter of the eye, forming 
an acute angle with the vertex; pronotum rather flat, median carina 
sharp; elytra broad, the costal margin flaring before the middle; whole 
upper surface of insect coarsely and irregularly punctate. 
*Width is always given across the widest part of the elytra when folded. 
