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 rooust, 

 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. 



i^ Cicada lateralis. Fab. Ent. Syst. Sup. , p. 524, i7g8. 

 fl Cicada 7narginella, Fab. Svst. Rhynsr. , p. 96, 1803. 

 ^ Cicada coslalis. Fab. Syst. Rhyng. Erata following, p. 314, 1803. 

 \ /'ettigonia striata. Wa]k. Homop. Ill, p. 77S, 1851. 

 6 J'ettigonialugens,'W\\k. Homop. Ill, p. 775, i8Si. 

 ^ '/'ettigonia pyrrhotelus. Walk. Homop. HI; p. 775, 1851. 



Much shorter thcin%fidata 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 prouotuoi but slightly inclined, eyes moderately 

 prominent, vertex slightly obtusely angled, 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 



