SCIENTIFIC RESULTS OF THE U. S. ECLIPSE EXPEDITION TO WEST AFRICA, 1889-'90. REPORT UPON THE INSECTA, ARACHNIDA, AND MYRIOPODA. BY C. V. Riley, Honorary Curator of Insects, [including descriptive papers en Pseitdoneuroptera by P. 1'. Calvert; and on Arachnida by Nathan Banks and George Marx.'\ (With Plate l,xx.) INTRODUCTION. The insects of this colleftion are from a rej^ion tlie insect fauna of which is almost totally unrepresented in the National Museum collec-tion. For want of funds \v»' have been una))le to make more than a very small be^inninj; in the collection of exotic insects, while the liter-ature at command in Washinj-ton ui)on exotic speciesjisyet very insuffi-cient. A large ])roi>(>rti<)n also of the African insect fan lui yet leinains to be worked up. For these various reasons 1 have been obliged to refer much of the material to specialists for determination, my own part in the woik Ix^ng little more thaji the orderly arrangement of the determinations for i)ubli(;ation. The collection as a whole is not large, and the Coleoptera and Lepidoptera were more generally collected than the insects of any other order. The llymenoi»tera of the collec^tion were kindly determined by Mr. W, F. Kirby, of the IJritish Museum, and 1 have simply brought the list together in jiroper arrangement aiul added a few notes. The Lepidopteiji, after some few s|)ecies iiad be(Mi <leterniined at the Museum, were sent to Kev. W. J, Holland, of Pittsburg, Pa., who submitted a full list of determinations arranged according to locality. In the inteiest of uniformity Mi'. Holland's list has been rearianged in systematic order. There were only seven species of Diptera collected. Dr. S. W. Wil-jiston, Avho has so jnaterially assisted me in working on the Diptera, was unwilling to attempt their determination, and the material was so poor and so scanty that it was not thought worth while to send it abroad. Four of the species have been determined generically. Proceedings National Museum, Vol. XVI, No. 951. 565
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