S. H. Scudder—Devonian Insects. 111 
Millions of birds afford a large item of subsistence, and seal, 
and later in the season some walrus, are taken by these natives, 
who act as middle-men in trading between Asia and America. 
A short but satisfactory set, each, of time, latitude, dip, inten- 
sity and azimuth was obtained, wit angles determining the 
position of the adjncsités island and the prominent features of 
the apart on either side. 
e of the most important results of the occupation of this 
sition was the determination of the fact that the boundar 
line, as defined by the treaty, does pass between the two islands 
without touching either, as was assumed in that document, but 
which had been ‘putin doubt by certain erroneous charts of the 
vas 
I may say that the aes: easterly variation which w 
pointed out in 1878, extremely marked in the ihe 
stations occupied, some oot the results showing five or six de- 
grees less variation than is indicated on the latest charts. A 
thorough explication of the results must, of course, await the 
final revision of the computations. 
Art. XI.—Relation of Devonian Insects to later and existing 
types ; by SAMUEL H. ScUDDER eee 
It only remains to sum up the results of this reéxamination 
of the Devonian insects, and nage cid to discuss their relation 
to later or now existing ty This may pea be done by a 
separate consideration of the "plowing points :— 
ere is nothing in the structure of these earliest known 
insects to interfere with a former conclusiont that the general 
type of wing structure has remained unaltered from the earliest 
times. Three of these six insects seas Homothetus 
and Xenoneura) have been shown to possess a very peculiar 
neuration, dissimilar from both Carboniferous and modern 
types. As will also be shown under the tenth head, the dis- 
similarity of structure of all the Devonian insects is much 
greater than would be anticipated ; yet all the features of neu- 
ration can be brought into perfect harmony with the system 
laid down b 
ae earliest insects were hexapods, and as far as the record 
goes preceded in time both arachnids and myriapods. This is 
shown only by the wings, which in all known insects belong 
only to hexapods, and in ‘the nature of things prove the earlier 
* This summary of results is the conclusion of . memoir by Mr. Scudder on the 
Devonian Insects of New Brunswick, published in the Anniversary Memoirs of 
the Boston Society of Natural oy istory, 1880. 
t The Early types of Insects. Mem. Bost. Soc. Nat. Hist., iii, 21. 
