00 
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THE ENTOMOLOGIST. 
First joint of the flagellum almost as long as 
all the following joints together. - - 
First joint of the flagellum much shorter than 
all the following joints together. 
Middle keel of the metathorax forked. - - 
Middle keel of the metathorax not forked. 
Third dorsal abdominal segment much longer 
than the fourth. 
Marginal branch as long as the radial areolet. 
Last joints of the flagellum more than twice 
as long as broad. - : - - 
Marginal branch much shorter than the radial 
areolet. Last joints of the flagellum not more 
than twice as long as broad. - : - 
Third dorsal abdominal segment not longer or 
not much longer than the fourth. 
Dorsum of the abdomen with eight segments. 
Radial areolet closed. 
Joints of the flagellum only slightly shortened 
near the tip. - - - - 
Joints of the flagellum much shortened near the 
tip. - : - - - . 
Radial areolet open. 
Stigmatic branch and submarginal branch much 
shortened, the former emerging from a nearly 
right angle. - - - - - 
Stigmatic branch and submarginal branch not 
unusually shortened, the former emerging 
from a very crooked angle. - - - 
Dorsum of the abdomen with less than eight 
segments. 
Dorsum of the abdomen with seven segments. - 
Dorsum of the abdomen with less than seven 
segments. 
Marginal branch more than twice as long as the 
radial areolet ; recurrent continuation of radial 
DIPHORA. 
Br yta. 
CINETUS. 
XENOTOMA. 
ZELOTYPA. 
PANTOCLIS. 
ZYGOTA. 
ACLISTA. 
ACROPIESTA. 
branch intersecting the basal vein. - - MAcRoHyYNNIs. 
Marginal branch shorter, as long as, or a little 
longer than, the radial areolet ; recurrent con- 
tinuation of radial vein not intersecting the 
basal vein. 
Dorsum of the abdomen with three segments ; 
second unusually elongated, almost extending 
to the tip. Marginal branch distinctly shorter 
than the radial areolet. - - - 
Mrora. 
