40 TERTIARY INSECTS OF NORTH AMERICA. 



meen, where a small section of hard laminated clays occurs witli layers of 

 softer arenaceous clay. Seven species were obtained from the first-named 

 localit}', five from the second, and four from the third. The Nicola localitv 

 is remarkable for yielding only Coleoptera; from Nine Mile Creek come 

 three species of Coleoptera and one of Hemiptera; while the Similkameen 

 locality, like Quesnel, affords us Hymenoptera, Diptera, and Hemiptera — 

 three species of the last — but no Coleoptera. 'Jliere can be no doubt. Dr. 

 Dawson informs me, "that the specimens from the North Similkameen and 

 Nine IMile Creek represent deposits in different portions of a single lake. A 

 silicifying spring, probably thermal, must, however, have entered the lake 

 near the first-named place, as evidenced by the character of some of the 

 beds, in which fragments of plants, with a few fresh-water shells, have been 

 preserved." The insects of each locality are specifically distinct from those 

 of any of the others As to their age, Dr. Dawson, the only geologist who 

 has studied them, remarks that we shall "probably err little in continuing 

 to call the Tertiary deposits of the interior as a whole Miocene, and in 

 correllating them with the beds attributed to the same period to tlie south- 

 ward in the basin lymg east of the Sierra Nevada." 



Scarhoro, Ontario. — In the vicinity of Toronto, on the north shore of Lake 

 Ontario, Mr. George J. Hinde has discovered vegetable and animal remains 

 in thin seams in clay beds which he regards as interglacial, lying as thev 

 do upon a morainal till of a special character and overlain by till of another 

 and (piite distinct kind. His account of the locality and the reasons for 

 his conclusions have been given l)y him in full.' Among the material found 

 by him wa.s a considerable number of the elytra and other parts of beetles, 

 an assemblajre indeed larger than has ever before been found in such a 

 deposit in any part of the world, and they are mostly in excellent condi- 

 tion. Twenty-nine species have been obtained, some of them in consider- 

 aljle numbers. Five families and fifteen genera are represented ; they are 

 largely Carabidse, there being six or seven species each of Platynus and 

 Pterostichus and species also of Patrobus, Bembidium, Loricera, and Elaph- 

 rus. The next family in importance is the Staphylinidpe, of which there 

 are five genera, Geodromicus, Arpedium, Bledius, Oxj^porus, and Lathro- 

 bium, each with a single species. The Hydrophilidse are represented by 

 Hydrochus and Helophorus, each with one species ; and the Chrysomelidse 



' Cauadian Jour. Sci., new series, vol. 15, 1887, pp. 388-413. 



