234 APPENDIX. No. VI. 



No. VI. 



INSECTA AND ARACHNIDA. 

 BY ROBERT MCLACHLAN, F.R.S., F.L.S. &c. 



WITH the consent of the Council of the Royal Society, all the 

 Arthropoda (excepting the Crustacea) were placed in my 

 hands for working out. These were principally collected by 

 Captain H. W. Feilden, the Naturalist of the 'Alert;' but in- 

 teresting forms also resulted from the researches of Mr. Hart, 

 who occupied a similar position on board the ' Discovery.' A 

 detailed Report on these collections was read by me at 

 the meeting of the Linnaean Society on December 15, 1877. 

 In that Report I made some justly merited eulogistic re- 

 marks on the entomological labours of the naturalists. The 

 materials brought home from between the parallels of 78 

 and 83 N. latitude showed quite unexpected, and in some 

 respects astonishing, results. 



In all there are about 45 species of true Insecta, and 

 1 6 of Arachnida. Of the former 5 pertain to Hymenoptera, 

 1 to Coleoptera, 13 to Lepidoptera, 15 to Diptera, 1 to 

 Hemiptera, 7 to Mallophaga, and 3 to Collembola. Of the 

 Arachnida 6 are true spiders, and about 10 are mites. 



In this Report I was assisted by Baron von Osten-Sacken, 

 who examined the Diptera, by the Rev. 0. Pickard Cam- 

 bridge, who worked out the spiders, and by Mr. Andrew 

 Murray, who attended to the mites. 



I have no hesitation in saying that the most valuable 

 of all the zoological collections are those belonging to the 



