April, '07] ENTOMOLOGICAL NEWS. 1 39 



Annotated List of the Species of Chrysops occurring in 



New Jersey and Descriptions of two New Species. 



By Erich Daecke, Philadelphia. 



(Plate VI.) 



Since the publication of the New Jersey State List of In- 

 sects, by Prof. John B. Smith, in 1899, in which were recorded 

 sixteen species of Chrysops, the number of species in this 

 genus has been more than doubled. The local interest taken 

 in this genus, as well as in other genera, families and orders, 

 can be traced directly to Prof. Smith's list, which not only 

 served many local collectors as a check-list, but stimulated 

 their work to no small degree. It indicates the value and even 

 the necessity of State lists. 



The wing picture is an excellent differentiating character in 

 the genus Chrysops, hence I have figured the wing of every 

 species so far collected in New Jersey, avoiding extreme and 

 perplexing forms which at times will occur. 



The figures are three-fold enlargements from average wings, 

 and the difference in size of figures gives the relative propor- 

 tion between the species. All the figures represent the wings 

 of females. 



1. C. excitans Walker. 



One specimen out of a large series from Bamber, v, 27, has 

 anal cell open. The yellow on sides of abdomen extends to 

 the third, rarely the fourth, segment on the South Jersey 

 specimens. Mr. William T. Davis has collected excitans at 

 Lakehurst, VI, 15. 



2. C. celer Osten Sacken. 



Common everywhere, from middle of May to beginning of 

 July. Specimens worn by flight often lack the charac- 

 teristic fulvous pile on pleura, and are easily mistaken for 

 niitis, and if such specimens happen to have the fifth posterior 

 cell entirely hyaline, as I have occasionally found on some 

 specimens of celer, as well as on some specimens of cdrbonar- 

 ius, they may also be mistaken for the latter. The broad and 

 spatulate grayish-white space between the facial callosities of 

 celer, which is narrower on mitts and almost linear on car- 

 bonarius, will be of value. The difference of infuscation on 



