PREFACE. 
XVII 
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1878. 
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-. United States entomological commission. Report 1. 1878. 
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letin. Vol. 3, 4, 5, pt. 1-3. 1877-79. 
. United States national museum. Bulletin. No. 7, 10, 12. 1877-78. 
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— . Verhandlungen. 1878, 1879, no. 1-13. 
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1878-79. 
. Zoologisches institut der universitat Wien und der zoologischen station in 
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It remains only to indicate briefly the plan and scope of the work. 
The first part, or u Supplemental List, 77 includes 15,939 entries of 
genera established previous to 1880, not recorded or erroneously given 
in the nomenclators of Agassiz and Marschall, or the Zoological Record 
indexes. It includes, however, besides these : 1st, the genera of the 
Zoological Record for 1878 and 1879 (2,133 names, which had not been 
entered in the MS. of the second part, or Universal Index, at the time of 
its preparation) ; 2d, the genera in the index of the Zoologischer Jahres- 
II 
