LIFE HISTORIES OF LEAFHOFrERS OF MAINE. 6j 



Moulting occurred in three days from hatching the 26th of 

 July for the eggs hatching July 23rd, a second moult occurred 

 four days later July 30, the third moult on Aug. 3rd, and the 

 fourth moult on Aug. 6th, with final moult and appearance of 

 adults on Aug. nth, or twenty days from hatching, about 

 twenty-seven days from egg deposition. Allowing a probable 

 week or ten days in adult' stage before egg deposition begins 

 would give us five to six weeks as the period of the summer 

 brood and at this rate it would be an easy matter to have three 

 cr four generations in a season for the latitude of central Maine 



The nymphs when first hatched cling pretty closely to the 

 leaf but may crawl around and especially toward the tip of the 

 leaf and the leaf becomes spotted with their punctures. These 

 at first appear white but later change to red and then to black 

 and the leaf in severe attacks will shrivel and turn yellow, in 

 bad cases the whole leaf turning yellow and shriveling. The 

 appearance is shown in the photograph reproduced in Fig. 12. 



Description of Early Stages. 



The eggs as dissected from 'adults July 10th and as examined from 

 leaves are slender with a length of .8 mm and a width of .16 mm 

 narrowing at either end, the head end wider and with a clear space while 

 the remainder of the egg contains minute globules as seen by trans- 

 mitted light. Fig. 1 d. The surface of the egg is smooth the chorion 

 with no apparent markings. 



1st instar: The nymphs on hatching are .6 mm to .7 mm long and 

 at end of the instar have reached a length of slightly over one milli- 

 meter. The head is large and rounded in' front much produced, half its, 

 length, before the eyes. Prothorax about half the length of the head, 

 mesot'horax short, transverse, meta-thorax about the length of the pro- 

 thorax the sides sliightly extended backward and the hind border slightly 

 concave. The hind tibiae bear six spines on the hind border and there- 

 are six or eight spines on the end of the abdomen and a comb of three 

 or four short curved spines on the end of the sub-anal plate. 



The antennae reach to base of the abdomen and bear on the third 

 segment the usual bristle. 



The color is slightly dusky and the moulted skins of this instar have 

 a smoky appearance. 



2nd instar: Quite similar to the first but with the head less 

 produced and with fairly distinct transverse bars of dusky color. The 

 hind tibiae have six spines and the terminal segment of abdomen ten or 

 twelve bristles and first tarsal segment of hind legs has two platella. 



