No. 1. — Reports on the Dredging Oj^eratioiis off the West Coast of 

 Central Amcriea to the Galapagos, to the West Coast of Mexico, 

 and in the Gulf of California, in Charge of Alexander Agassiz, 

 carried on hy the U. S. Fish Comviission Steamer "Albatross," 

 during 1891, Lieut. Commander Z. L. Tanner, U. S. N., Com- 

 manding. 



[Published by Permission of Marshall McDonald, U. S Fish Commissioner.] 



VII. 



The Orthoptera of the Galaimgos Islands. By Samuel H. Scudder. 



The first Orthoptera collected on the Galapagos Islands were obtained 

 by Darwin in 1835, during the voyage of the " Beagle," and found their 

 way to the British Museum, where they have been reported on by Walker 

 and Butler. Darwin collected on several of the islands, but the speci- 

 mens were not always kept separate. In 1852 the Swedish frigate 

 "Eugenie" touched at the islands (Chatham, Charles, Indefatigable, 

 Albemarle, and James), and from the collections made two species of 

 Orthoptera were described by Stal, without statement of the particular 

 islands on which they were taken. The islands were next visited, in 

 1872, by L. Agassiz in the " Hassler," which touched successively at 

 Charles, Albemarle, James, Jervis, and Indefatigable, at all of wliich ex- 

 cepting James and Jervis Orthoptera wei'e obtained. Next Commander 

 Cookson visited the archipelago in the " Peterel " hi 1875, touching 

 at Charles, Abingdon, and Albemarle, and bringing back Orthoptera 

 from all but Abingdon ; these are in the British Museum, and have been 

 reported on by Butler ; including those obtained by Darwin, there were 

 six species. In the same year Wolf, the State Geologist of Ecuador, 

 visited the islands, and in a brochure published later made mere mention 

 of two species of Acridium, of which the smaller [Schistocerca literosa 

 Walk.) was found in the vicinity of the sea, the larger (.S'. melanocera 

 Stal) in the interior of the islands. Mr. A. Agassiz later made a similar 



VOL. XXV. — NO 1. 1 



