330 THE UNIVERSITY SCIENCE BULLETIN. 



Tibicen resh (Hald.). 



(PI. XX. figrs. 3-4; pi. xxiv, fig. 7; pi. xxvi, fig. 2: pi. xxvii, fig. 5.) 

 Cicada rea?! Hald., Stansb. Salt Lake Exped., p. 369. pi. 9, fig. 17, 1852. 

 Cicada roberfsoni Fh., Trans. N. Y. Agr. Soc, xiv. (1854), p. 745, 1855. 

 Cicada rnbertsotii Davis, Jl. N. Y. Ent. Soc, xxiii, p. 164, 1915, (synon. of resh). 

 Cicada rt'xh Davis. Jl. N. Y. Ent. Soc, .xxiii, p. 5. pi. 1, fig. 3, 1915. 

 Tibicen resh Van D., Cat. Hemip N. A., p. 493. 1917. 

 Tibicen resh Davi.s, Jl. N. Y. Ent. Soc. xxvi, p. 149, 1918. 



A large yellowish-green and black species. Specimens at hand meas- 

 ure from 32 to 35 mm. 



Color: Head mostly black, but with large triangular spots along an- 

 tennal margins to eyes, an oval spot on upper portion of front, triangular 

 spots at base of front, a spot just caudad of this, and irregular spots on 

 each side along posterior margin laterad of the lateral ocelli, yellowish- 

 green. Pronotum yellowish-green, marked with black as follows: Two 

 small triangular spots on anterior margin which sometimes run back- 

 ward and fuse with the black converging lines in the grooves which run 

 back to the collar, and with two spots laterally in groove cephalad of 

 collar. In dark specimens the entire anterior margin of the pronotum 

 may be black, as well as the entire groove cephalad of the collar. Such 

 forms have the two large black characteristic median triangles which en- 

 close a median elongate greenish spot. Mesonotum largely black, with 

 two elongate lateral greenish to brownish spots on each side and a 

 median pair of spots of the same color which form the Hebrew letter resh 

 inverted. The abdominal terga are black as a rule, but often have the 

 posterior margins brownish. The wings have the veins greenish basally, 

 with the possible exception of media, but they become brownish apically. 

 The cross veins between R, and R4 .-, and between the latter and M, are 

 strongly darkened. The basal areole of the fore wings is greenish while 

 the flaps of both wings are a brownish-gray. Beneath the insect is usually 

 testaceous and in fresh specimens is pruinose. The legs are also testa- 

 ceous, the femora streaked, and the tarsi and tibiae darker. 



Form: The following are the measurements in millimeters of the 

 specimens at hand: 



Length of body 32 to 35 



Width of head 14 . 5 to 16.5 



Expanse of fore wings 98 to 107 



Greatest width of fore wing 15 to 16 



Greatest width of operculum 7 to 7.5 



Greatest length of operculum 9 to 9.5 



The opercula are about as broad as long excluding the extension be- 

 yond the coxal cavity. They overlap very slightly medially, and the 

 posterior margins are broadly and evenly rounded. 



Genitalia: The supra-anal plate of the male has a broad and stout 

 but very low median process which does not equal the rather pointed 

 lateral angles. The uncus, viewed laterally, is widest at the base, some- 

 what curving, and widened again apically, with the apex rather truncate. 

 Viewed caudally it is a broad and short sclerite, the apex quite truncate 

 and shallowly notched. The ventral piece has the slender arms widely 



