IOWA ACADEMY OP SCIENCES. 
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lower. The ovipositor is furnished with numerous, long, con- 
spicuous hairs. 
In the male the lower plate is smaller than usual, little longer 
than the preceding ventral segment, tapers slightly to base of 
claspers, roundish ventrally , posteriorly deeply concave for recep- 
tion of base of claspers, dorsal margins short, nearly straight. 
Claspers long, inclined forward when at rest, furnished with num- 
erous short bristly hairs, curved laterally so as to include an egg- 
shaped space with the point downward, tips sharply pointed, 
brownish black, apparently chitinous, and touching each other. 
Dorsal plate same height as claspers, wide at base, has no 
horizontal, backwardly projecting prolongations as in the genus 
aphalara, tapers gradually to the tip, has a distinct curve in 
the middle, causing the tip to bend toward the claspers. 
Viewed posteriorly it is oval in outline, the curves correspond- 
ing to the curves in the claspers, whose closed tips fit neatly 
into the dorsal plate. 
Penis usually distinctly visible between the claspers, its 
height to the geniculation a little more than one-half the 
height of the claspers. 
Anterior margin of head broadly convex and bear- 
ing six or more bristles. Compound eyes dark, prominent. 
Paired ocelli distinct; anterior one hidden from above. Antennae 
long, reach to middle of wing-pads, and have the usual ten 
segments as follows: Two enlarged basal joints and five suc- 
ceeding ones distinctly separated, the eighth, ninth and tenth 
not so distinct, only being indicated by constrictions. The tip 
is black, terminal bristles distinct, of equal length. The first 
joint is short, thick and very roundish. The second is shorter, 
more cylindrical and much smaller in diameter than the first. 
Joints about three to seven, about equal in length and width, 
the fifth, however, being slightly shorter than the others; all 
have one or two visible bristles at their distal end. 
Prothorax distinct and as broad as head wfith the eyes. 
Femur of first pair of legs projects about half its length beyond 
prothorax; tibia shorter than femur; first tarsal joint not clearly 
separated from tibia, only indicated by a slight constriction. 
Mesothorax strong and robust, wider than head or protho- 
rax. Wing-pads robust, outer margin convex, furnished with 
numerous hairs, tip broadly rounded and reaching back to 
second abdominal segment. Posterior wing- pads smaller, 
front part overlapped by anterior jDads; tip and posterior 
