HEMIPTERA OF COLORADO. 57 



black; rostrum and thrnat rust-brown. Pronotuni fuscous, coarsely granulated, narrower 

 than the base of tlie wing-covers, and somewhat quadrangular in outline, the lateral 

 margins a little reflexed, the posterior margin distinctly curved, anterior angles a little 

 rounded, the anterior nic^rgin wider than the breadth across the eyes. Wing-covers pale 

 greyish-yellow, with irregular patches of darlc brown granules aggregated more particu- 

 larly near the base and along the disk; tlie large pale spots at base angular and tinged 

 ■with greenish; veins mostly dark brown, very prominent, the area on the apical 1)order 

 pale, crossed by the divaricating inner vein and tlie one next outside from it, the areoles 

 are continued to near the apex, and the discoidal one is crossed by four oblique veins. 

 Underside rust-brown, obscured by some darker patches, and set witli a few small 

 granules, the orifices of the stigmata placed in knobs. 



Length to end of hemelytra 3 mm. Width of base of pronotum .75 mm, Only one 

 specimen has been brought to my notice. It is a male sent to me from Colorado. This is 

 the most remarkable form of the family Tingidae which has yet been placed within my 

 reach for study. It is a synthetic type which unites in itself a structure of wing-covers 

 closely related to Oxycarenus, of the family Lygaeidae, and on i' o other hand, the 

 characteristic head of Piesma and the granular surface of Agiamma. Taken in all its 

 features it is the most peculiar form of Tingid which lias yet been discovered in North 

 America. The other sex is unknown to me and it might add further characteristics to 

 the genus if once brought to notice." 



Estes Park, July 12th (Gillette). 



Corythuca arcuata Say. 



Colo. (Gillette^see Osborn, 1). 



Fort Collins, July 29th (Baker) . Foot-hills five miles west 

 of Fort Collins, April 25th to August 1st (Gillette and 

 Baker). Steamboat Springs, July 26th (Gillette). 



Corythuca ciliata Say. 



Custer County, midalpine (Cockerell, 10). 



Fort Collins, May 31st on alfalfa (Baker). Steamboat 

 Springs, July 16th and 26th (Baker and Gillette). Montrose, 

 June 24th (Gillettee). 



Corythuca fuscigera Stal 



Fort Collins, July 2d in all stages on Cnicus; Steamboat 

 Springs, ^uly 15th (Baker). Colorado Springs, August 3d 

 (Gillette). 



Gargaphia tiliae \N'alsh. 



Rist Canon, May 29th (Gillette). 



Aradus acutus Say. 



Colo. (Uhler, 6). Koaring Fork (liothrock— see Uhler, 2), 



Fort Collins, March 31st (Gillette). 



Aradus a&nis Kirb. 



Dolores, June ISth: Este^ Park, July 9th (Gillette). 



