New or omitted species are given under the headings of their ap- 

 propriate genera, and are indicated by a current number in continua- 

 tion of those in the "Check List." In addition, all species which were 

 in the old list as synonymes or varieties of other species, but which are 

 now considered distinct, are given with a current number. When a 

 species given in the old list has been transferred to a new genus it 

 usually bears a new number, but in the earlier part of the list, when; 

 a species has been removed to a genus immediately preceding or follow- 

 ing that in which it stood, it has been given with the old number, as 

 on p. 7, Phloeoxena siguata is numbered 425, the old number under 

 Coptodera. 



Changes of synonymy are indicated as follows : when a species is 

 considered identical with another in the ;t Check List" it is shown as on 

 p. 5, 92=91, which means that No. 92 semipunctata L'sch is identical 

 with 91, coerulescens, (Linn.^), or if the species is considered to be a 

 variety of another it is identical as follows : 13 i2a; 3i=28b; etc. 



If the specific name in the " Check List" is to be changed for any 

 reason, it is indicated as on p. 7, 446=Maurus Mots, means that Platy- 

 nus stygicus Lee. No. 446 is a synonyme of P. maurus Mots. 



In a few instances a species described since the " Check List" was 

 published is considered identical with a previously described species. 

 This is indicated by printing the old name and number with the new 

 name under it, as on p. 6 : 



237 pumilus Pntz. 

 falciger Lee. 



or if the newly described species is a var. of the former one, as on p. 

 6, 349b, rhodopus Sz. 



It was impossible without extending the list too much to indicate 

 the proper place of the new species with reference to the others in the 

 same genus, but in a few cases where many changes have been made, 

 I have included all the species according to the new arrangement. 

 The whole of the Rhynchophora have been given according to the new 

 arrangement. 



I am under great obligations to Drs. LeConte and Horn, and to 

 Mr. Henshaw, for assistance in preparing this list, which has proved a 

 much more difficult task than I anticipated. 



E. P. AUSTIN. 

 Boston, Aug., iSSo. 



