Sept. iSgg.] BaNKS : SmYNTHURID/E OF LoNG ISLAND, N. Y. 193 



EXPLANATION TO PLATES. 



Plate III. 



1. Spilographa setosa, s^). nov. 6. Aciura ferrughiea^ s^. nov. 



2. Trypeta straminea, sp. nov. 7. Aciura nigricornis, sp. nov. 



3. CEdaspis anthracina, sp. nov. 8. Acrotcenia otopappi, sp. nov. 



4. Rhagoletis rihicola DoANE. 9. Eutrcta nora, sp. nov. 



5. H/iagoietis caurina, sp. nov. 10. Eittrcta aurantiaca, sp. nov. 



Plate IV. 



1. Eurosta conspurcata, sp. nov. 7. Tephritis californica, sp. nov. 



2. Eurosta aterrima, sp. nov. 8. Tephritis rtifipennis, sp. nov. 



3. Neaspilota brunneostigmata, sp. nov. 9. Euaresta tricolor, sp. nov. 



4. Tephritis variabilis, sp. nov. 10. Urellia pacijica, sp. nov. 

 5 Tephritis murina, sp. nov. II. Urellia aldr.ichii, sp. nov. 



6. Tephritis webbii, sp. nov. 



THE SMYNTHURIDiE OF LONG ISLAND, 

 NEW YORK. 



By Nathan Banks. 



Among the Thysanura the Smynthuridae are doubtless the most in- 

 teresting group. Higher developed and more handsomely marked 

 than their fellows they more readily attract attention and study. Their 

 habits are various. Some live on stagnant water, several on living 

 healthy plants, most upon decaying vegetation, many on fungi, some 

 among ants, a few in caves, and others among moss. Like most of 

 the Collembola they are quiet until disturbed, when, by the aid of the 

 powerful spring or furcula, they make a great jump, nearly always fol- 

 lowed by several other leaps of less extent. Their structure affords 

 several good points for classification and discrimination of species, 

 most prominent of which are the antenna and furcula. The two 

 common garden species, S. arvalis and 6". Iwrtcnsis, are of some eco- 

 nomic importance. 



The spring-tails with a short body constitute the family Smynthu- 

 ridse. Lubbock separated certain forms from them under the name 

 of Papirid^e, but to my mind without just cause. Early in the history 

 of these insects they were arranged by Bourlet in two genera, Smyn- 



