UHLER ON INSECTS. 403 



Trichopepla Stal. 



1. T. semivittata. 



Peniaioma semivittata Say, Heteropfc. New Harmony, 9, No. 21. 

 Pentatoma piUpesDiiWa.ii, British Mus. List Hemipt., ii, 247, No. 37. 

 Tricho])epla semivittata Stal, Enum. Hemipt., ii, 34, No. 1. 



From the vicinity of the Arkansas River in Colorado, August 10, 

 swept from weeds. 



2. T. atricornis. 



TricTiopepla atricornis Stal, Emim. Hemipt., ii, 34, No. 2. 

 A single specimen from northeast of Denver, August 18. This 

 species is broader and more regularly oval than the preceding, but it 

 belongs more particularly to the north and west of i^orth America than 

 that species. Specimens were collected in the vicinity of the Yukon 

 River and in the Mackenzie River region by Robert Kennicott ; others 

 occurred near Lake Winnipeg, in California, in Illinois and in Wisconsin. 



Peeibalus Muls. 

 P. limbolarius. 



Periialus Umiolarius Stal, Enum. Hemipt., ii, 34, No. 1. 



Perihahis modestusJJhleT, Fifth Ann. Rep. U. S. Geol. Surv. for 1871, 1872, p. 396. 



This species was moderately common in the nymph stage, upon sev- 

 eral kinds of flowering plants, on August 6-8, in Beaver Creek Gulch 

 and in Clear Creek Canon. A few days later, I found the imago on 

 plants near Colorado Springs and at Manitou ; on August 11, I took 

 several specimens while sweeping the plants in the mouth of the Arkan- 

 sas Canon. 



It varies somewhat in the amount of black upon the two last joints of 

 the antennre ; in the presence, or not, of black upon the acetabular caps ; 

 and in the blackish reticulation upon the corium. The membrane is 

 either bronze or almost hyaline. 



HoLCOSTETHUS Fieber. 

 H. ahbreviatus. 



Holcoatethua ahbreviatus Uhler, Fifth Anu. Rep. U. S. Geol. Surv. for 1371, 1872, 

 p. 397. 



I found a few specimens of the nymph, August 6, in Beaver Brook 

 Gulch. A fine imago, from near Salt Lake, Utah, Wvas given to me by 

 Mr. S. H. Peabody. 



Thyanta Stal. 

 1. T. rugulosa. 



Pentatoina rugulosa Say, Heteropt. New Harmony, 7, No. 16. 

 This beautiful little species was moderately common in Clear Creek 

 Canon and in Beaver Brook Gulch, August G-S. It occurred upon 

 the wild gooseberry, and upon several kinds of bushes which grew near 

 the running streams. Several spots in the latter locality consisted of 

 loose blackish soil, which supported a rank vegetation, and it was upon 

 this that these and some other Hemiptera were most abundant. 



