March, '03] ENTOMOLOGICAL NEWS. 99 



Since the publication of the catalogue I have been able thus 

 far to add about 120 species of Diptera ; a list of which will 

 be published as soon as the material collected during the past 

 summer has been thoroughly studied. The Hymenoptera and 

 Diptera will yield the greatest number of additional species, 

 and I feel confident in asserting that there are over 2000 spe- 

 cies of Diptera within the confines of the State. This esti- 

 mate is based on a comparative list made of the Diptera of 

 Eastern Pennsylvania. Taking a separate of the New Jersey 

 catalogue, I went over my collection and checked off all those 

 represented from Pennsylvania and inserted all additional 

 species and records ; this improvised list shows about 185 not 

 recorded or collected, as far as I know, within the confines of 

 New Jersey, but which will undoubtedly be found, particularly 

 in the more northern part of the State. Thus we have about 

 1,500 species at present recorded from this section. 



It may here be of interest to note in what ratio the nuriiber 

 of species differ in a few of the larger and best studied fam- 

 ilies : In the Syrphidae New Jersey has 109 species, of which 

 24 have not been recorded or collected in Pennsylvania ; and 

 Pennsylvania 112, of which 30 have not been recorded from 

 New Jersey. Asilidae, 57 from New Jersey, of which 14 have 

 not been taken in Pennsylvania and 46 from Pennsylvania, 

 of which 6 have not been recorded from New Jersey. Bomby- 

 lidse, 38 from New Jersey and 21 from Pennsylvania, while all 

 but one of the latter have been collected in New Jersey ; 1 7 

 of those taken in New Jersey have not been recorded from 

 Pennsylvania. The dry sandy region of Southern New Jersey 

 seems especially favorable to many of the species of this fam- 

 ily. Tabanidae, 55 from New Jersey, of which 25 have not been 

 reported from Pennsylvania; 33 from Pennsylvania of which 3 

 have not been recorded from New Jersey. Leptidse, 20 from 

 New Jersey, of which 3 have not been recorded from Pennsyl- 

 vania ; and 24 from Pennsylvania of, which 8 have not been 

 taken in New Jersey. Tachinidse, 125 from New Jersey, of 

 which 57 have not been recorded from Pennsylvania ; 76 from 

 Pennsylvania of which 15 have not been recorded from New 

 Jersey. The Tachinids should be placed among the families 



