28 MUSEUM OF COMPARATIVE ZOOLOGY. [Apr. 



it is the result of the labor of years by the most experienced 

 and most faithful students. 



The collection of Crustacea was revised by Dr. William 

 Stimpson, just before the great calamity in Chicago, and arrange- 

 ments were made to improve this interesting order, by his valu- 

 able aid. The numerous additions are still stored until he has 

 leisure to use them scientifically. 



The collection of spiders has been gone through, and deter- 

 mined generally by Mr. Emerson, and in some parts by Mr. 

 Holden. , 



The new room to which this department has been transferred 

 is considerably more spacious, and more convenient for work. 

 It will now be possible to have the aid of more workers, and to 

 give convenient working- places to more students. 



Mr. Hubbard has been partly occupied with the family of the 

 Longicorns, and Mr. Austin with the family of Tenebrions. 

 The monograph of the immature stages of the Gomphina, by 

 Mr. Louis Cabot, is in print, the first part having been already 

 published. The monographs of the Arachnidse will be ready 

 very soon. 



Exchanges are made with several entomologists in the United 

 States and in Europe, and parts of the collections sent out to 

 monographers have been returned determined. In the same 

 manner the Passalini by Dr. Kaup in Darmstadt, the Cordulina 

 by the Baron de Selys-Longchamps in Liege, Belgium, and some 

 others, are to be returned from time to time. 



Report of^. S. Sealer, Assistant in charge of instruction. 

 During the last year my whole time has been given to in- 

 struction, except some work in the field. The arrangement 

 which has been made with the University, whereby the instruc- 

 tion in Zoology and Palaeontology, in all its departments, ex- 

 cept the Bussey School, is given at the Museum, has much in- 

 creased the number of students. During the year, ninety- 

 seven (97) persons have received practical instruction in this 

 department. This number does not include those who have 

 merely attended lectures, but only those who have been taught 

 in the laboratory room in a practical way. 



