Green Fruit Worms. 579 



The moth was first described as X. cinerosa in 1879, from New 

 York state specimens. In 1882, Dr. Riley pointed out that thig 

 name could not be used, as another insect belonging to the same 

 genus had received the same name years before. He suggested 

 the name X. grotei instead, but thought the insect was only a 

 variety of X. antennata. Nothing has since been recorded about 

 the species. 



A comparison of the figures of the moth at a and 6, plate 3, 

 with the figures of the moths of the other two species on plates 

 1 and 2, will show how remarkably similar the insects are in the 

 adult state. The moths of X. grotei have a much brighter ap- 

 pearance and their markings are more sharply defined than in 

 either of the other two species. The ground color of their wings 

 is much like that of X. antennata, but there is a decided differ- 

 ence in the male genitalia of these two species, as is shown in the 

 enlarged figures at f and g, plate 3. Our specimens of the moths 

 of X. grotei emerged from the 18th to the 26th of September. We 

 have found no recorded captures of this species. Doubtless its 

 life-history is very similar to that of X. antennata. 



The caterpillars of X grotei so closely resemble those of X. 

 antennata that we did not notice their characteristic differences 

 until the moths which appeared in one of our cages were deter- 

 mined as two distinct species ; and until we had seen the only cat- 

 erpillar preserved by Dr. Riley when he studied these green fruit 

 worms in 1870. The caterpillar at the left in the frontispiece (the 

 same one is shown at e, plate 3) is of this species ; figures c and d, 

 plate 3, are reproductions of photographs taken twice natural 

 size, from Dr. Riley's preserved (blown) specimen. Compare these 

 figures with those of the caterpillars of X. antennata at e, f and g, 

 plate 1. The difference between the broad stigmatal stripes is 

 readily seen; in X^rroiei, both edges of the stripe are quite sharply 

 defined, wbile in X. antennata the upper edge is much broken 

 or indented with the body color. Anothr difference readily 

 seen on the specimens, but not so evident in the figures, is that 

 the subdorsal stripes in X. grotei are not so continuous as in 

 X. antennata, but are made up of three or four irregular spots on 

 each segment. Otherwise, as regards general color, size, etc., 



