64 Journal New York Entomological Society, t^oi. xxiv, 



completely as in hieroglyphica and johannis. Beneath lighter, nearly unicolor- 

 ous ; black about the base of the rostrum ; also at the base of the abdomen and 

 each side near its tip. There are a few dark spots on the legs. The opercula 

 are small and are more fully rounded out, that is, the outer margin of each 

 one forms more nearly a part of a circle than in hieroglyphica. The uncus, 

 which is figured, when seen from behind is broadly notched with the upper 

 part of the notch rounded, and not narrowly notched as in hieroglyphica. 



Measurements (in Millimeters.) 



Male Type. Female Allotype. 



Length of body 27 22 



Width of head across eyes 8 8 



Expanse of fore wings 68 67 



Greatest width of fore wing 11 10 



Greatest width of operculum 3.5 



Greatest length of operculum 3 



In addition to the types the male of which is figured and will 

 show the wing pattern, two paratypic males of the same date and 

 locality have been examined. There are also many more specimens 

 from the same locality in the collection of the U. S. Nat. Museum. 



From Cicada sex-guttata of unknown locality, Cicada cJiisos dif- 

 fers in being larger, and in having a dififerent color pattern on the 

 head, pronotum and mesonotum. In Biol. Centr.-Amer., Rhynch. 

 Hom. I. Tab. 3, Figs. 2, 2a and 2b, a Mexican specimen is figured 

 under the name of Tettigia hieroglyphica Say. With the exception 

 of the shape of the opercula, which are fully rounded in Cicada 

 chisos, the illustrations represent quite well the species under consid- 

 eration. 



EXPLANATION OF PLATES. 



Plate III. 



Fig. I. Cicada figurata Walker. 



Fig. 2. Cicada canicularis Harris. 



Fig. 3. Cicada davisi Smith and Grossbeck. 



. Fig. 4. Cicada aurifera Say. 



Plate IV. 



Fig. I. Cicada townsendi Uhler. Type. 



Fig. 2. Cicada townsendi Uhler, 



Fig. 3. Cicada bifida Davis. Type. 



Fig. 4. Cicada bifida Davis, enlarged. 



Fig. s. Cicada castanea Davis, enlarged. 



