320 THE UNIVERSITY SCIENCE BULLETIN. 



Tihicen linnei (Sm. & Grsb.). 



(PI. xviii, figs. 1-1; pi. xxiv, fig. 2; pi. xxvi, fig. 11; pi. xxvii, fig. 16.) 

 Cicada linnei Sm. & Grsb., Ent. News, xviii, p. 127, 1907. 

 Cicada tibicen Germ., Mag. d. Ent., iv, p. 95, 1821. 

 Fidicina tihicen Walk., List Homop., i, p. 94, 1850. 

 Thopha chloromera Walk., List Homop., i, p. 43, 1850. 

 Cicada tibicen Fh., Trans. N. Y. St. Agr. Soc, xv, p. 367, No. 73, 1856. 

 Cicada tibicen Harris, Treat. Ins. Inj. Veg., edn. 3, p. 219, 1862. 

 Cicada tibicen Uhl., Stand. Nat. Hist., ii, p. 227, 1884. 

 Cicada tibicen Woodw., Psyche, v, p. 68, 1888. 

 Cicada tibicen Uhl., Trans. Md. Acad. Sci., i, p. 149, 1892. 

 Cicada tibicen Macg., Can. Ent., xxxiii, p. 82, 1901. 



Cicada tibicen Felt, N. Y. St. Mus. Memoir, 8, i, p. 237, pi. 46, fig. 1, 1905. 

 Rihana tibicen Dist., Cat. Homop., Cicadidae, p. 36, 1906. 

 Cicada tibicen Davis & Jout., Ent. News, xvii, p. 238, 1906. 

 Cicada tibicen Tuck., Kans. Univ. Sci. Bui., iv, p. 64, 1907. 

 Cicada linnei Davis, Jl. N. Y. Ent. Soc, xxiii, p. 10, 1915. 

 Tibicen linnei Van D., Cat. Hemip. N. A., p. 490, 1917. 

 Tibicen linnei Davis, Jl. N. Y. Ent Soc, xxvi, p. 146, pi. 7, fig. 1, 1918. 



A green and black species looking like T. prulnosa in form and color. 

 Specimens at hand measure from 30.5 to 33 mm. 



Color: Head mostly black, with the following marked with green: A 

 broad stripe on each side along antennal ledge from front to eyes, these 

 stripes each with a small black spot near the front, an elliptical spot on 

 upper portion of front connected with a median triangular spot at base 

 of front, and with irregular marks along posterior margin laterad of 

 each lateral ocellus. Pronotum green, with two large black posteriorly 

 tapering median spots which enclose a wedge-shaped green mark, and 

 with the grooves and back of the eyes frequently black, there sometimes 

 being a black spot also on the lateral margins. Mesonotum green, marked 

 with black as follows : Between the arms of the W, a large spot on each 

 side laterad of this which extends taperingly to posterior margin, a 

 smaller spot on each side laterad of these, and a large spot cephalad of 

 the light cruciform elevation, this spot having a narrow anterior process 

 which reaches between the median arms of the W. Abdominal terga 

 black, the posterior margins sometimes being testaceous. First segment 

 in males with a pair of small but distinct pruinose spots. The wings 

 have the veins, with the exception of media, greenish basally and becom- 

 ing brownish apically. The cross veins between R3 and R4+5 and between 

 the latter vein and Mi, are strongly and broadly infuscated. The basal 

 areoles of the fore wings are green. The flaps of both wings are grayish 

 or brownish. Beneath the insect varies from greenish to testaceous, the 

 opercula being lighter than the rest of the under side and fresh specimens 

 are entirely pruinose with the exception of the black median portion of 

 the abdomen. The legs are light brown or greenish with a tendency to 

 darken apically. 



Fortn: The following are the measurements in millimeters of the 

 specimens at hand : 



Length of body 30.5 to 33 



Width of head 14.25 to 15 



Expanse of fore wings 94 to 100 



Greatest width of fore wings 14 to 14.5 



Greatest width of operculum 6.5 



Greatest length of operculum 8 to 8.5 



