74 MAINE AGRICULTURAL EXPERIMENT STATION. . I916. 



The observations confirm pretty positively the occurrence of 

 but one generation each year the adults maturing in July an I 

 living on into the fall with pretty certainly fall oviposition and. 

 hibernation in the egg stage. Nymphs were found in good 

 numbers in our cages placed in early spring which proves 

 hibernation in the fields and the absence of any signs of adults 

 either dead or alive shows pretty conclusively that eggs are laid 

 and adults die in fall. Furthermore the development of egg* 

 had reached such a stage in August that it would indicate fall 

 oviposition. 



The first nymph observed was taken at Eliot on June 26th 

 apparently in the first instar and at Orono young nymphs (j>„t 

 instar) were taken July 2nd. One in 2nd instar on July 1st 

 and these would indicate hatching in late June probably as early 

 as June 20th for all the southern part of the state. 



The nymphal stages are passed rapidly as the period between 

 the first noticed nymphs and earlier adults is but about four 

 weeks. The first adult observed in the fields at Orono wns 

 taken July 1st, a male, and these became fairly plenty by the 

 middle of the month. The females mature a little later, the 

 first taken July 18th, than the males but no mating was seen 

 until after August 8th. The latest nymph observed was one m 

 last instar on Aug. 8th. The greatest abundance of nymphs 

 occurred during the first week in July when the different stages 

 were all pretty well represented in field collections. By July 

 28th adults of both sexes were abundant and scarcely any 

 nymphs were to be found. 



Description of Nymphs. 



The youngest nymphs found were two millimeters long and were 

 probably first instar individuals but partially grown. They are green 

 in color with outline of the adults but quite different in color, the grass 

 green color of the upper side is flecked with black dots. Below fainter 

 green. 



The second stage nymph observed (2nd instar) is three and one-half 

 millimeters long of very much the same shape as the earlier form but 

 with a slight indication of the formation of wing pads in enlargement 

 of the lateral parts of meso- and meta-thorax. 



The color is grass green tinged in places with yellowish and above 

 flecked with black dots which are most numerous on the posterior part 

 >f the meta-thorax. Beneath there are dots on the face very scant on 



