OF WASHINGTON. 11 



nearly straight, the anterior and posterior angles broadly rounded; 

 edges of elytra and pronotal margins armed with short, white spines, 

 tipped with black; at the nervtires of the hood and near the elevated 

 part of elytra there are also a few scattered spines. Sometimes speci 

 mens have the armature a little stronger. Discoidal area irregularly 

 reticulated with four or five rows of areoles, tumidly elevated behind, 

 marked with a brownish spot; the subcostal is biseriate and the costal 

 area has three rows of hexagonal or pentagonal areoles, those on its 

 widest part, mostly at the inner side, very large ; on the sutural area 

 before the apex are also a few large hexagonal areoles. Legs yellow 

 ish, the tarsi darker at tip. Claspers of the male strongly curved, not 

 hairy. 



Length 3.2 mm., width 1.6 mm. 



Described from many specimens of both sexes. Some larval 

 forms were also examined. Washington, D. C., February 18, 

 1884, October 12, 1882 (Pergande), July 18, 1902; Bedford 

 Co., Pa., August 23, 1902 ; Front Royal, Va., September 10, 

 1903, May 29, 1904 (Heidemann) ; Springfield, Mass., August 

 29, 1902; Urbana, III, October n, 1904 (Knab) ; Lawrence, 

 Kans. (Tucker). 



Type (from Washington, D. C., $ and ?). No. 8302, U. 

 S. National Museum. 



This new species is to be distinguished from Corythuca 

 ciliata Say, and from the species occurring on oak by the dif 

 ferent shape of the pronotal hood, which is less elevated in 

 both of the latter, and by the fact that in these latter, also, the 

 adjoining middle carina is as high as the globular portion of 

 the hood. It is also distinct from Corythuca marmorata Uhler 

 in having the elytra not so much speckled with brownish mark 

 ings ; while Corythuca incurvata Uhler differs from it in the 

 great, abrupt height of the hood, and Corythuca juglandis 

 Fitch differs from it in the more inflated, globular part of the 

 same. 



In one of the note-books of the Bureau of Entomology, Dept. 

 of Agriculture, there is a short account of this tingis by Mr. 

 Th. Pergande under number 2893, as follows : 



October 12, 1882, February 18, 1884, found quite a number of Tingis 

 on lower side of leaves of different species of Alnus on the Agricultural 

 grounds of Washington, D. C. Mounted winged specimens, marked 2893, 

 and larvae on slides 3/4/1.5. 



No. 2945, November 5, 1882; found several specimens, larvae and 

 adults of Tingis on lower side of leaves of Hazel. Mounted winged 

 ones, marked 2945, and larvae on slide 3/1/56. 



The U. S. National Museum also contains specimens of 

 this tingis, labeled as found on elm and crab-apple trees. I 



