238 NORTH AMERICAN FAUNA. [No. 7. 



iu this order from any part of the Pacific coast, and would be largely 

 true of almost any part of the country. It is a singular fact, however, 

 that no new genera occur, as will be noticed, in the parasitic families, 

 the most interesting fact worthy of mention being the discovery of 

 what is probably a representative of the genus Scolobates, found hereto- 

 fore only in northern Europe. The parasitic Hymenoptera were re- 

 ferred to my assistants, Mr. L. O. Howard for the Chalcidkhe, and Mr. 

 William H. Ashmeadfor the other families, and the generic references 

 of the undescribed forms are upon their intimate knowledge of the sub- 

 ject. They will not be able to characterize the many new forms in 

 time for this report. 



The Diptera were few in number and were referred to Dr. S. W. 

 Williston, who has characterized the new forms, and whose report 

 shows that, small as was the collection, it added three genera to the 

 American fauna. 



In the Heteroptera the list represents merely the species that were 

 readily determinable, while the balance, including the more interesting 

 forms, have been referred to Mr. P. P. Uhler, of Baltimore, Md., who 

 has kindly reported on them, with definitions of the new genera and 

 species. 



In the Homoptera, as will be noticed, there are some interesting new 

 species, especially in the family Psyllidse, but until they are carefully 

 compared, I do not feel justified in making any remarks upon them. 

 ISTor have I time just now to characterize the undetermined forms which 

 I prefer to do in connection with the very many new species in the Na- 

 tional Collection to which I have already given much study. 



The Orthoptera are of considerable interest, although the collection 

 is small. In the Acridiidse, which probably have been most thoroughly 

 studied in this country, three new species occur and one new genus. 

 The undescribed material has been referred to Mr. Lawrence Bruner, 

 of Lincoln, ISTebr.. who has reported on the new forms. Probably 

 the most interesting find in this order is the rediscovery of Scyllma 

 delicatula Scudder. The type of the species, and the only one hitherto 

 found was taken in the Garden of^ the Gods. Most of the other species 

 are of rather wide distribution. 



The Arachnida were referred to Dr. Geo. Marx and are determined 

 by him. 



