1906.] NATURAL SCIENCES OF PHILADELPHIA. 375 



This specimen was beaten from the rank growth of weeds about a 

 small water-filled depression in the prairie. Owing to the immense 

 number of common species in this place no other 

 specimens of this species was noticed, and much beat- 

 ing in the same locality failed to secm-e additional 

 specimens, 



CAMNULA stai. 

 Camnula pellucida (Scudder). 



Waco, Montana, Aug. 4, 3 d^, 2 ? . Emigrant, 

 Montana, Aug. 4, 1 9 , Daileys, ^lontana, Aug. 4, 1 

 9 . Sphinx, Montana, Aug. 4, 1 9 . Electric, Mon- 

 tana, Aug. 4, 1 9 . ]\Iuir, Bozeman Tunnel, Montana, 

 Aug. 12, 1 c?,2 9 . Sappington, Montana, Aug. 12, 1 

 d^. Spire Rock, Montana, Aug. 12, 1 cJ*. Mammoth Fig. 9.—Encop- 

 Hot Springs, Yellowstone Park : hill at head of springs, SS^ ^Bru- 

 Aug. 5, 1 9 ; on geyser formation at the upper end of ner. Knob 

 springs, Aug. 5, 1 c?. Fountain, Lower Geyser Basin, J?'^l' Colorado 

 Yellowstone Park, Aug. 6, 1 d^. Upper Geyser Basin, orado'! Dorsal 



Yellowstone Park, Aug. 7, 1 d". The Thumb, Yel- ^'^^^ of If^d 



' andpronotum 



lowstone Park, Aug. 7, 1 9 . Near Grand Canon, of male, (x 3.) 



Yellowstone Park, Aug. 10, 1 9 . Yellowstone Lake, 



Aug. 7, 1 9 . Upper slope of Dark Caiion, Pike's Peak, Colorado, 



Aug. 16, 4 d", 1 9,1 nymph. 



The specimens from Waco are very interesting as they are exceed- 

 ingly pale in color, some appearing rather uniform dull straw color 

 with the maculations much reduced and quite feeble; others have the 

 maculations distinct but the lighter shades all the same color as in 

 the other pale individuals. The specimen from geyser formation at 

 Mammoth Hot Springs is coated with the mineral deposit. 



This species was one of the most plentiful of those found in Montana. 

 At Waco the insects fairly swarmed in the dry prairie grass and sage. 

 In this locality the specimens were extremely pale in coloration; 

 exactly the color of the plants on which they were found. I have 

 never seen greater swarms of insects than those of C. pellucida in the 

 sage at the foot of the hills at Mammoth Hot Springs. The species was 

 everywhere in Montana far more plentiful in the low dry locations, but 

 in Colorado I found it only at a considerable elevation in Dark Canon, 

 Pike's Peak. One specimen was found in the Mammoth Hot Springs 

 completely coated by the white formation. In another spring quite 

 a few specimens of this and other species were found dead, killed 

 probably by the fumes. 



