August, '15] LEONARD: IDIOCERUS PROVANCHERI 417 



N. Y., on April 29, 1915, and the writer observed nymphs hatching on 

 apple on May 6, 1915, at Ithaca. Hatching apparently commences 

 at about the time the blossom clusters appear. At Rochester Junction 

 a number of nymphs were observed on June 4, 1914, on an apple tree, 

 one of which was in the third instar. On June 10 an adult was taken 

 from the same tree with the last nymphal skin next to it. 



This species has been recorded from Montreal, Winnipeg, and 

 Hamilton in Canada, from Mt. Washington, from Buffalo, Lake 

 Placid and Severance in New York, and is said to occur westward as 

 far as Iowa. The two specimens which represent this species in the 

 Cornell University collection were collected by E. P. Van Duzee in 

 1886 at Lancaster, X. Y. 



The eggs of this species, according to the observations of Professor 

 Crosby, are inserted almost full length into the bark of the fruit spurs 

 about one-fourth inch from the base of the buds. The exuvium pro- 

 trudes slightly. These were observed commonly by him on apple 

 trees at Stuyvesant Falls, N. Y., on April 29, 1915. Newly hatched 

 nymphs were abundant on the twigs. The writer has observed small 

 hemipterous eggs inserted almost full length into the bark just at the 

 base of the fruit buds on an apple tree near the Insectary at Ithaca. 

 First stage nymphs of Idiocerus provancheri were present on the tree. 

 One of these eggs was dissected out of the twig and it bore so strong a 

 resemblance to the egg of Idiocerus alternatus Fitch, as figured by 

 Osborn & Ball in the paper referred to above, that I think there is no 

 doubt of its belonging to the species under consideration. This egg 

 is shown in Plate No. 24, figure 1. 



The following descriptions of the immature stages of this species 

 are based upon rearings made in the Cornell Insectary during the past 

 two seasons. 



The egg. — Length, 1.62 mm., greatest width, .45 mm., cyHndrical, slightly curved, 

 broader and more bluntly rounded at posterior end, tapering somewhat at anterior 

 end and acutely rounded ; pale yellowish or whitish in color, somewhat shining. In 

 the figure the eye-spot of the embryo is shown. 



Stage I (PI. 24:, fig. 2). — Length, 1.12 mm.; width of head including the eyes, .56 mm.; 

 abdomen at widest point, .32 mm. General color, shining dark brownish to black. 

 First segment of abdomen pale yellowish with a broad sHghtly procurved dark 



Explanation of Plate 24 

 Idioceriis provancheri V. Duz. 



Fig. 1. Egg. 



Fig. 2. First stage nymph. 

 Fig. 3. Second stage nymph. 

 Fig. 4. Third stage nymph. 

 Fig. 5. Fourth stage nymph. 

 Fig. 6. Fifth stage nymph. 

 Fig. 7. Adult. 



