GEOLOGICAL SURVEY, CANADA. 



CONTRIBUTIONS TO CANADIAN PALEONTOLOGY. 



VOLTJMIK II. 



OANADIAI^ FOSSIL INSECTS 



By Anton Handlirsch. 



5. Insects from the Tertiary Lake Deposits of the southern interior of 

 British Columhia, collected hy Mr. Lawrence M. Lamhe, in 1906.^ 



In the year 1906, during geological explorations in the southern 

 interior of British Columbia, Mr. Lawrence M. Lambe, of the Geolo- 

 gical Survey, collected a number of remains of Tertiary inseets, 

 which were entrusted to me for investigation by Dr. A. P. Low, thten 

 Director of the Geological Survey. In presenting the result of my 

 study of these specimens — which have proved to be of unusual 

 scientific interest — I have, at the same time, to express my apprecia- 

 tion of the confidence implied by the placing of this work in my 

 ihands. 



The entire collection comprises IB examples : chiefly represented 

 by obverse and reverse impressions; these forms being distributed 

 ■among the systematic groups as follows: — 



Orthopiera (Acridioidea), 1; Goleoptera, 4; Hymenopteroi: 

 IchneumonidsB, 1; Ehaphidioidea, 1; Diptera: Bibionidse, 54; 

 Ptychopteridae, 1; Tipulidse, 2; Empidas, 1; Hemiptera: Pentato- 

 midse, 1; Gerridae, 1; Romoptera: Oeroopidas, 3; InSecta imeertw 



The number of specieis determined in these groups is : 1, 4, 1, 1, 

 20, 1, 2, 1, 1, 1, 2, 6, respectively. It is thus seen that in the majority 

 of species only one example of each is present, which is always the 

 case in so comparatively small a collection of fossil insects. Kegard- 

 ing the preservation of this material, it is to be noted that, in rela- 

 tively many examples the body and extremities are still in associa- 

 tion; hence it may be concluded that the insects were entombed 

 at the spot where they m^ death, and that no transportation by 

 water took place. It is likewise noteworthy that with the exception 

 of one species of Gerris — ^which is not here considered as a water- 

 strider all the specimens pertain to species furnished with wings; 



> Translated by Miss Lucy P. Bush, of New Haven, Connecticut, U.S.A. 



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