2 CRESSON TYPES OF HYMENOPTERA 



It is the firm recollection of the author that after all the unique 

 specimens had been described and returned to Air. Belfrage, as 

 he requested they should be, that gentleman, rinding a duplicate 

 in his collection of what he considered to be the same species, 

 very generously returned the type-specimen to the Society, after 

 the publication of "Hymenoptera Texana." There are only nine 

 in this category, and reference thereto is made under each of 

 the species in its proper place in this catalogue. The same may 

 be said of Mr. Gundlach, after the publication of "The Hymen- 

 optera of Cuba" in 1865. 



The Gundlach Collection of Hymenoptera is in the Museum 

 of the "Instituto de Segunda Enseiianza de la Habana," Obispo 

 Street, Havana, Cuba. Dr. Henry Skinner, Curator of the 

 American Entomological Society, who visited the Museum in 

 1 9 1 3, found the collection arranged in thirteen hermetically 

 sealed, glass-top boxes. The specimens appeared to be in good 

 condition, but that of the type-specimens themseh-es could not 

 be accurately ascertained, although an effort was made to obtain 

 the information. 



The Boll Collection is in the Museum of Comparative Zoology, 

 Cambridge, Mass., and Dr. Samuel Henshaw very kindly fur- 

 nished recent data regarding the types in that collection. 



The type-specimens described from the Norton Collection 

 appear to be lost, except a few now in the collection at the Acad- 

 emy of Natural Sciences, Philadelphia, Pa. 



In conclusion, the author desires to express his thanks to Dr. 

 Henry Skinner and Mr. E. T. Cresson, Jr., in charge of the Ento- 

 mological collections at said Academy, for valuable aid gi\'en 

 in the preparation of this catalogue. 



Types of 2737 species are given in the following list. 



At the v\\(\ of this paper, immediately before the Index, is 

 appended a list of the entomological writings of the author, ar- 

 r.. .<•<! in chronological order and numbered consecutively, to 

 ena. '•• the student to locate the papers in which the types are 

 descri jed. As a further guide the numbers of the papers follow 

 the fan lies in the I ndex. 



