210 
IOWA ACADEMY OF SCIENCES. 
across both vertex and pronotum; elytra coriaceous, about twice longer 
than wide, without an appendix, the apex rounding, both veins of corium 
forking before the middle, forming two long discoid cells; apical cells 
irregular, usually about five; wings with the third vein from the marginal 
vein forked and forming a closed apical cell; entire dorsal aspect of insect 
coarsely and irregularly punctate; male valve wanting. 
The members of this genus are all of moderate size, varying 
from 8 to 12mm. in length, and are strikingly uniform in color 
and pattern of marking, being grayish or brownish, with two 
irregular, oblique, dark-margined light bands on the elytra, 
sometimes obscure and sometimes broken up into spots. 
The variation in color and marking is not sufficient to 
enable one to readily recognize the different species and they 
are only accurately separated by reference to structural char- 
acters, the three most important being the degree of inflation 
of the front with the corresponding variation of the facial 
angle, the shape of the terminal ventral segment of the male 
abdomen and the shape of the male plates, the latter character 
alone enabling one to readily separate that sex of all our 
species. 
In distribution this genus seems to be limited to the north- 
ern hemisphere, and the greater number, if not all the species, 
occur in the temperate zone. Europe has three species, all of 
which are widely distributed, while this paper recognizes eight 
species occurring in the United States and Canada, and Fowler 
has recently described three new species from Mexico in the 
Biologia. These latter are all small and are apparently 
closely related to Jf-notata, the only one of our species that has 
been taken as far south as our southern border. 
Of the species under consideration Jf-notata has the greatest 
known range, occurring from Ontario to Florida, and west to 
North Dakota and Iowa. Next to it comes permutata^ which 
has been found from Vancouver’s island south to central 
California and eastward to Colorado. Of the others, parallela 
is the only one that has as yet been recorded from widely 
separated localities, and it is very probable that some of its 
western records were based on other species. 
SYNOPSIS OF THE SPECIES. 
A. Elytra very broad, angulate behind, the outer margin strongly 
curved and with two more or less distinct hyaline areas; general 
color light-gray or brown; head and pronotum nearly flat, front 
but slightly inflated, acutely angulate with vertex. 
