354 ENTOMOLOGICAL SOCIETY 



work. In 1890 he visited Montana, sparing the time from his 

 horticultural work at Crescent City. In 1891, in company with 

 Mr. Schwarz, he- visited the Wasatch Mountains in Utah, Lake 

 Tahoe, California, and the Yellowstone Park. In 1892 they 

 went together to Oregon, Washington, and British Columbia. 

 In 1893, at Crescent City, he began his most interesting, im 

 portant and suggestive investigation of the insect guests of the 

 Florida land tortoise, which, as Dr. David Sharp remarked, 

 opened up an entirely new field of study. 



In the spring of 1894 an unexpected trip to Montserrat, B. W. 

 I., with Riley, whom he accompanied as an expert on orange in 

 sects, brought about another change in his life and his relations 

 with the Department of Agriculture were resumed. A new and 

 revised edition of his standard work on orange insects was greatly 

 desired and he spent a year accumulating material for such a 

 volume. As the work progressed, his plans expanded, and he 

 expected to make the book include a consideration of the 

 insects affecting all citrus plants for the entire world, but he was 

 interrupted first by the fatal illness and final death of his 

 father in 1896 and later by the serious failure of his own health. 

 He was sent by his physicians in the autumn of 1896 to the 

 south shore of Lake Superior, where it was hoped that the clear 

 air would result in a decided improvement in his health. In the 

 winter of the same year he went to Arizona, where he stayed till 

 the summer of 1897. He was by that time sadly broken in 

 health, but still explored the country more thoroughly, entomo- 

 logically, than had been done before, as witnessed by the great 

 number of insects of all orders that were collected. He returned 

 to Detroit and seemed in somewhat better health at the meeting 

 of the A. A. A. S., then held there. He then presented the last 

 paper that he ever read, on the Giant Cactus and its insect 

 fauna. 



In the winter he returned to his place in Crescent City, where a 

 change for the worse in his health took place. Accompanied bv 

 his wife, he barely managed to reach Arizona again, where he 

 was joined by Mr. Schwarz. In spite of his greatly enfeebled 

 condition, he still managed to do a great deal of collecting. 

 Again returned to Detroit, he gradually failed and, to escape the 

 inclemency of a Michigan winter, he* went once more to Florida. 



