702 STATE BOARD OF AGRICULTURE 





It was predicted in the list of 1890 that "future studies will undoubtedly add 

 at least 20 per cent, more," and this forecast has been more than fulfilled. 



I also suggested that while it was then expedient to retain the old Linnsean 

 division into eight orders, I would expect to accept the modern sub-divisions in 

 a future edition. This I have done here, recognizing twenty-two orders, of 

 which the Parasitica, Homoptera and Heteroptera are probably sub-orders of 

 one type only, i. e., broadly, the Rhyngota. 



Of the Thysanura no list is given for lack of available material ; but in all 

 the other orders, the percentage of increase is fully up to the figure already 

 mentioned. 



With the increased knowledge gained from collections made in the ten years 

 last past, I feel safe in predicting an equally great percentage of increase in the 

 next decade, though it will not be so equally distributed. Any list in the Thy- 

 sanura will be clear gain. In the Ephemerida, the Plecoptera, the Corrodentia, 

 the Platyptera, the Neuroptera and the Trichoptera the list should be doubled. 

 In the Odonata the additions will probably be very few, and this may be said of 

 the Orthoptera as well. In the Hemipterous series there should be a large 

 increase in both Homoptera and Heteroptera, since neither order has been at 

 all thoroughly collected. This is particularly true of the smaller Homoptera, 

 including the hosts of plant lice and leaf-hoppers. The Coleoptera will show a 

 large percentage of increase in the families containing the smaller species. 



The first edition enumerated 9 species of Scydmczttidce and 13 species of 

 Pselaphidce. In the present edition there are 29 species of Scydnicsnidcc and 67 

 of Pselaphidce ! This increase is entirely due to the fact that Mr. Wenzel has. 

 especially sought these little creatures, and when others devote their attention 

 in like manner to certain other groups similar results may be expected. 



In Lepidoptera few additions are to be expected among the butterflies or 

 larger moths ; but in the micros there will be a very great increase as our col- 

 lectors appreciate the infinite variety and beauty of these little creatures. 



In the Hymenoptera great additions are to be expected in the smaller para- 

 sitic types which have not been really collected at all. Indeed, except for the 

 Aculeates taken in South Jersey by Mr. Fox, we have had no systematic collect- 

 ing whatever, and our records are based on incidental or accidental captures. 



So the Diptera may be expected to furnish a considerable percentage of 

 increase, estimated by Mr. Johnson at 33 per cent. They have scarcely been 

 taken even as accidentals by the majority of the collectors, and only Mr. John- 

 son has done systematic collecting in a few localities. Whole families are 

 practically unrepresented, and in an order in which the species have a wide 

 distribution New Jersey should have a majority of all those found in the 

 Eastern United States. 



The predictions made by me ten years ago have been justified : it is unlikely 

 that I will be the one to point to the verification of those made in 1900. 



