20S 



Journal New York Entomological Society, ["^'o'- ^^v. 



front is not as prominent as in townsendi and the genitalia differ. See 

 illustrations in Journal N. Y. Ento. Soc, March, 1916. 



Mr. Charles Dury, of Cincinnati, Ohio, who has sent me many 

 insects, presented me with my first specimen a number of years ago, 

 and I take pleasure in naming the species in honor of my friend. 



Tibicen castanea Davis. 



Bonita, Arizona, Pinaleno Mts., July 16, 1917, five males (H. H. 

 K.). Post Creek Canyon, Fort Grant, Arizona, July 17, 19 17, female 

 (J. B.). 



This species was described from Arizona in the Journal N. Y. 

 Entomological Society for March, 1916, where illustrations will be 

 found. 



Tibicen knighti new species. 



Type male from Santa Catalina Mts., Tucson, Arizona, July 23, 

 1917 (Harry H. Knight). Davis collection. 



Head above black with a dark yellowish spot each side between the 

 antenna and the eye and an irregular one each side of the ocelli at the back 

 of the head and extending to back of the eye. Pronotum blackish, shining, 

 with the posterior marginal band olive colored, the band extending along the 

 sides to the anterior angles, the posterior angles of the pronotum, however, 

 are fuscous. Mesonotum shining chocolate-colored, the elevated X olive, 



Tibicen knlqliti. 



and the sides of that color also to the base of the fore wings where there 

 is an orange spot seen only when the insect is expanded. The outer sides 

 of the W-mark are faintly outlined in part with olive. Tergum shining, the 

 tympanal areas rather conspicuous and chocolate-colored. The succeeding 

 segments blacker with the posterior margins faintly chocolate-colored. Last 

 segment with a pruinose spot each side, and more conspicuously chocolate- 

 colored than segments three to seven. Fore wing with the costal margin 

 yellowish to the end of the radial cell, darker beyond; subcostal vein black; 



