44 
IOWA ACADEMY OF SCIENCES. 
Several more of Fowler’s species may fall in this list 
when the Mexican forms are more thoroughly known. His 
descriptions are very meagre, and he evidently paid little 
or no attention to genitalia, so that it is very hard to defi- 
nitely place any of his species until a specimen comes 
to hand that has the exact color pattern that he described, 
as he rarely makes any provision for variation in his 
descriptions. 
For the northern part of its range this species seems to 
be very constantly of the form figured, but farther south 
the smaller and darker varieties appear, none having been 
received, however, from nearer than central Mexico. From 
the extreme southern part of our range (Florida and 
Texas), a variety that is somewhat shorter and more robust, 
proportionally, has been received. These specimens are 
usually very obscurely marked, and of a uniformly dull 
brown color, but the head pattern and genitalia are iden- 
tical with the common form. 
The color pattern of the head is quite definite in all of 
the varieties, except the very darkest, where it is obscured, 
but even here the “A” of the vertex, and the lines of the 
front can usually be traced in an oblique light, and form 
one of the best characters for distinguishing this species. 
Fowler speaks about the color pattern of the pronotum 
serving to separate this species. This is one of the most 
variable things about it, and it is little wonder that with 
such a character as a guide be added to the confusion, 
instead of helping to clear up the synonomy. 
ONCOMETOPIA LATERALIS FAB. 
Cicada lateralis , Fab. Ent. Syst. Sup. , p. 524, 1798. 
cicada marginella, Fab. Syst. Rhyng. , p. 96, 1803. 
Cicada costalis, Fab. Syst. Rhyng. Erata following, p. 314, 1803. 
/'ettigonia striata. Walk. Homop. Ill, p. 775 , 1851. 
T ettigonia lug ens, Walk. Homop. Ill, p. 775, 1851. 
'/’ettigonia pyrr/iotelus, Walk. Homop. Ill; p. 775,1851. 
Much shorter than undata but nearly as broad; eyes not 
as prominent. Black, coarsely irrorate with yellow; Elytra 
red, veins black. Length, 7-8 mm.; width, 2.75 mm. 
Head and pronotum but slightly inclined, eyes moderately 
prominent, vertex slightly obtusely augled, twice as long on middle 
as at eye, length equal to half its basal width, four-fifths the prono- 
tal length. Front moderately gibbous, sloping back from the plane 
