Labrador, le pays et la population . Fig. 21.Agabus arcticus. 444 Annexe i Il a été décrit pour la première fois de Laponie, et est très commun dans Lab-rador, mais n'a lieu nulle part ailleurs en Amérique. Il s'agit d'un étroit, slenderinsecte un quart d'un pouce long, brun jaunâtre, avec la tête et une bande sur le thorax (ou partie centrale du corps) noir. Les carters d'aile sont assez rugueux et inégaux. L'autre coléoptère que Iseght au début de mes amis du Labrador {Agahusinfuscatus Aube) est par exemple encore plus commun que celui de la théillustration. Il a été recâblé à partir des supports Wash-ington et L.

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Labrador, the country and the people . Fig. 21.Agabus arcticus. 444 Appendix i It was first described from Lapland, and is very common in Lab-rador, but occurs nowhere else in America. It is a narrow, slenderinsect one-quarter of an inch long, yellowish brown, with the headand a band across the thorax (or middle portion of the body)black. The wing cases are quite rough and uneven. The other beetle which Isought in the beginning frommy Labrador friends {Agahusinfuscatus Aube) is appar-ently even more commonthere than the one in theillustration. It has been re-corded from Mount Wash-ington and Lake Superior, but it is certainly not com-mon at either of these points.It is shorter and more robustthan Agahus arcticus; thewing covers are brown, thehead and thorax black. The large water-beetleshown in the next figure (No.22 Dytiscus dauricus Gebl)is one of the largest of theLabrador beetles, being aninch and a quarter long. Itis greenish black, with the. Fig. 22.Dytiscus dauricus. borders of the thorax and of the wing covers yellow. The imder sideof the body is yellow, with several black lines and markings. Thebeetles of the genus Dytiscus are probably the most highly devel-oped of all beetles. The males have the three basal joints of thefront tarsi (the last segment of the leg) enormously dilated andenlarged into a large circular disk, the under side of which is cov-ered with a large number of palettes, some large, some small. Themiddle legs are similarly modified, but to a less degree. Thesedisks are of use in enabling the beetle to cling to objects, and areprobably also very sensitive organs. The females do not havethese disks at all, but, on the other hand, they often have deepgrooves or furrows extending longitudinally halfway or more alongthe wing covers. While speaking of water-beetles, it is interesting to note thatthey all possess real wings and are capable of flying great distances.In countries where there are artificial lig

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