IOWA ACADEMY OF SCIENCES. 43 



ing them with Central American and Mexican forms it 

 seems nearly certain that ohtusa Fab. was but a dark variety 

 of undata, and as uhtiisa was described first the species 

 would bear that name, while our forms would be the 

 variety. Stal in Hemip, Fabriciana describes ohfiisn as 

 wdth the head markings of undata; these markings are 

 very constant and can be partially traced, except in the 

 darkest forms, and appear to be one of the best distin- 

 guishing characters outside of the genitalia. Signoret 

 does not mention these markings nor figure them in obfiisa, 

 but he places clarior Walker from Fla as a synonym, and 

 it had the head markings distinct, as described by Walker. 

 He gives the claval veins as united in ohtusa, but Stal gives 

 them as like undata. Signoret does not describe genitalia 

 under obtusa, but under his next species he describes it in 

 showing how that species differs from i^ Fowler follows 

 Signoret in his treatment of the species, and under remarks 

 on tartarea describes the genitalia of ohtusa as like that of 

 our undata. He follows Signoret in the synonomy of 

 undata and adds marginata and its three synonyms; he. 

 however, places undata on a very pale form, which he 

 figures, and then describes alpha as a possible variety, 

 while in fact it is nearer the typical form. His next 

 species, ruhescens, and a previous one, interjecta, seem also 

 to belong to the ohtusa group. He suggests tartarea and 

 funehy'is as coming in there, but specimens in hand from 

 Mexico which agree with the descriptions of these species 

 are quite distinct. The^funehris is given as from Calif, by 

 Signoret, but no specimens of it have been seen from 

 there, and it has not been included in the synopsis; possi- 

 bly Lower Calif., Mexican, is meant. 



H, on further examination, the above conclusions prove 

 to be correct, then the full -synonmy of^jhtusa, as far as 

 known, will be, in addition to the abov^, all of which will 

 come under the va.riety undata, as follows: 



"^ Cicada obtusa. Fab. Mantissa Ins. , p. 269, 1787. 



') J'roronia parallela. Walk. Homop. Ill, p. 788, 1851. 



Tetttgoiiia facialis. Sign Monog. An. Sc. Ent Fr. , p. 489, 1854. 



TeUigonia herpes , Sign. Monog. An. Sc. Ent. Fr. . p. 796, 1855. 



w Oncometopia obl.ufi. Fowl. Bio. Homop. II, p. 228, 1899. 



o ? Oncometopia interjecta. Fowl. Bio. Homop. II, p. 228, 1899, pi 14, fig. 12. 



? Oncometopia ruhfscens. Fowl. Bio. Homop. II, p 233, 1899, pi. 14, fig. 24. 



