139 



the ornithology and ichthyology of the state, all reprinted in a second edi- 

 tion, as were also the First, Eighteenth, and Twenty-third reports of the 

 State Entomologist's Office." 



The insect collection of the Natural History Survey now contains 

 no material definitely known to have been collected by Benjamin Dane 

 Walsh and only a few specimens from the LeBaron collection. Of the 

 Thomas material, almost nothing now remains except his collection of 

 .\phididae which was acquired in very poor condition as reported by 

 J. J. Davis in Bull. III. State Lab. Nat. Hist.. Vol. X, Art. II, igij. f^p. 

 gj-i2i. The present collection, then, consists almost entirely of speci- 

 mens collected since 1883 and to Stephen Alfred Forbes and Charles H. 

 Hart belong the main credit for its development and present importance. 

 In addition to the material acquired by the direct collecting of members 

 of the stait of the Survey and its forerunners, considerable material has 

 been added by the acquisition of several private collections. The most 

 notable of these is the first W. A. Nason collection acquired in 1008. The 

 Survey is also the recipient of much material generously donated by 

 specialists and amateurs and has profited through the medium of ex- 

 change. 



At the conclusion of the list of types in the insect collection of the 

 Illinois State Natural Histon' Survey, there is added a list of the types 

 in the insect collections belonging to the University of Illinois. These 

 collections are available for study by members of the Survey Staff in 

 keeping with the cooperative policy which also places the facilities and 

 insect collection of the Survey at the service of the University. The 

 Natural History Museum of the University of Illinois possesses the An- 

 dreas Bolter and second \V. A. Nason collections of insects. Both of 

 these collections were gifts to the University, the former in 1900 and the 

 latter in 1920. The Bolter collection is the only one of the two which 

 contains any types. The Department of Entomology of the University 

 acquired the A. D. MacGillivray collection of Tenthredinoidea in 1924. 

 This is one of the most important collections of sawflies in North Amer- 

 ica and is exceedingly rich in types. The Bolter and second Nason 

 collections are now housed in the Natural Histor\' Museum of the Uni- 

 versity, and the A. D. ]\IacGillivray collection is with the types of the 

 Natural History Survey. 



Some special comments are necessary concerning the contents and 

 preparation of this article. Attention has already been directed to the 

 selection of lectotypes to stand for single types in the case of cotypic 

 series. The designation of lectoallotype has been given to a single speci- 

 men of the opposite sex from the lectotype of a cotypic series. The 

 remainder of the cotypic series, after the selection of single types, have 

 been regarded as paratypes. Where the describer of a new species has 

 clearly indicated the selection of a type and an allotype no selections have 

 been necessary. In cases where the describer of a new species based hi'^ 

 description upon a unique, that specimen is considered as the type with- 

 out the presence of such a statement in the literature. \Miere both sexes 



