52 
Annual Reports of Academy of 
The collection of Diptera is steadily growing and has been under 
the care of Mr. E. T. Cresson, Jr. More than 275 specimens have 
been received from various sources, including 115 specimens of 60 
species, mostly from South America and East Indies, containing 
many paratypes. The family Borboridae has been studied by an 
authority and contains over 525 specimens and 75 species, of which 
many are to be described as new. A large collection of the family 
Micropezidae, mostly from South America and the East Indies, 
has been studied by Mr. Cresson, among which many new species 
were found and will shortly be described. The material retained 
will increase the Academy’s collection in this family about 75 per 
cent. Much time has been given to the material sent in for de¬ 
termination, which, in most cases, has been added to the col¬ 
lection. The Diptera collected by the Academy expeditions are 
being studied and reports on these are in preparation. Mr. Cresson 
has also labeled and numbered the Bassett types of the hymenop- 
terous family Cynipidae. Of the 125 species described by Mr. 
Bassett, the collection contains all but two. The following papers 
have been prepared by Mr. Cresson in the course of his studies of 
the collection and published, or are in press: Studies in American 
Ephydridae; Descriptions of New Genera and Species of Ephy- 
dridae; and, The Bassett Types of Cynipidae. 
In the Orthoptera, Messrs, Rehn and Hebard have continued the 
rearrangement of the exotic series, almost the entire series of 
Tettigoniidae having been handled and large series of recently 
determined material interpolated. Similar work has been ac¬ 
complished upon a large part of the exotic Acrididae. 
Mr. Rehn has made an extensive study of the Blattidae of the 
West Indies, and upon certain genera of North American Acrididae. 
Progress has been made upon several papers on African Orthoptera, 
which have been under way for some years. An important col¬ 
lection, made in the Amazonian region of Brazil and Peru, has been 
received for study from the Royal Swedish Natural History Mus¬ 
eum, a representation of the material to remain at the Academy 
in return for its study. 
Mr. Hebaid has completed studies of three genera of North 
American Acrididae, and has continued his studies of Panamian and 
Colombian Orthoptera into the families Mantidae, Phasmidae and 
Acrididae. A second most important collection of Guianan Blat- 
