228 THE CANADIAN ENTOMOLOGIST. 



belonging to different families, but I did not get the imagos. 



I found here, at the upper geyser basin, a few things on the spruce 

 trees, but nothing new. There are one or two Tdephonis, Corymbites, 

 several Dascyllidce, etc. Malachiidce. of the genera Dasytes and Listrus 

 are also common here as elsewhere on spruce and pine. Nowhere else in 

 Yellowstone Park have I been able to find anything on pines except these 

 Malachiids. Beating trees and bushes seems to produce nothing at all. 

 At the upper geyser basin there was a large meadow, which had over part 

 of it a deposit of alkaline mud, dry and cracked in the sun. Here I 

 find a gigantic Aphodius with variegated elytra (A. hamattis ?) under cow- 

 dung. Only one specimen was alive, the others had been killed by the 

 hot sun, and their dead bodies were very abundant on the mud or under 

 dry dung. An Elaphriis, apparently E. ruscarius, was running about on 

 the mud in the hot sun. In patches of cyperaceous grass in this alkaline 

 plain I got a large Patrobus-like Carabid, or else a peculiar Pterostichus. 

 There was also a Stenus under the dead grass. 



On July 27th, at evening, we arrived at Yellowstone Lake. The shore 

 of the lake, which I was not long in visiting, consists either of glacial 

 boulders, or beaches of rather coarse, black gravel. No insects are 

 thrown up by the waves at present, except, perhaps, an occasional 

 Hemipter or Coccinella. However, there is a beach fauna, consisting of 

 the usual black Cryptohypfius of large size ( C. funebris), a large black 

 A?ithicus, which is very common, and a much rarer species quite minute 

 in size. To my great surprise I found here a single specimen of that same 

 peculiar Coleopterous larva {Saprinus ?) with maggot-like body and 

 almost obsolete legs, that I found among the Ephydras on the shore of 

 great Salt Lake. There were also a few species of dark bronze or black 

 Bembiditim and an A mar a. 



On July 29th we were on the road from the Grand Canon to the Mam- 

 moth Hot Springs, which we reached late in the afternoon. I visited the 

 nearest group of hot springs and found the usual fauna. The neighbour- 

 hood is cavernous, and a river of hot water runs beneath the hotel. Under 

 stones there are crickets, which evidently belong to a subterranean species. 

 We spent the next day at the mammoth hot spring, and I had a good 

 chance to collect. I found the Ochthebius and other things in the hot water 

 on the terraces, and under stones a good many Amur a, Pterostichus, Patro- 

 bus, etc. A cedar appears here for the first time, and is growing on the 

 terraces formed by the hot springs. On this I found, by beating, a 



