490 Report of the Department of Entomology of the 



Pronotum with similar shading on sides and median area. Wings clear with greenish 

 yellow veins and tinge of green between veins on inner edge. Femora dull green; 

 tibiae and tarsi black. Antennae black; first and second segments greenish yellow. 

 The first segment has a brownish shading covering the inner and upper part of the front 

 side, and including a heavy black line along the inner edge and a black spot near 

 the distal end, which may be confluent with the black line. Second segment with 

 two elongate black spots. (Fig. 30, c.) Venter of abdomen solid black; the remainder 

 greenish yellow. Dark specimens late in the season have the head, pronotum, legs 

 and antennae nearly entirely black. Both pairs of spots on the two basal antennal 

 segments are confluent (Fig. 30, d) and in some specimens each of these segments 

 are almost entirely black. Length of body, 15 mm. Forewing of male, 10-11 mm. 

 by 4-5 mm. Forewing of female 11-12 mm. 



HATCHING OF EGGS AND DURATION OF NYMPHAL INSTARS. 



In 1909 the young of this species began to emerge just before 

 June 17. In 1913, eggs from the southern part of the Hudson Valley- 

 hat ched June 7; some eggs from Connecticut began to hatch on June 

 10, while of a shipment received from New Brunswick, N. J., on 

 June 10 a little more than one-half of the eggs had hatched. During 

 this same year eggs of this species collected about Geneva hatched 

 in largest numbers on June 16 and 17. 



A study of the eggs in their natural positions in the wood shows 

 that generally they slant downward from the hole, and since the 

 dorsal side of the embryo is always next to the concave curvature 

 of the egg the young cricket on hatching first appears upside down. 

 In some observations of young insects in captivity it was observed 

 that they displayed cannibalistic tendencies, and the cricket that 

 emerged first would not infrequently attack those that were in 

 process of emerging from the eggs and devour them. 



During the summer of 1913 the first specimen in the second instar 

 was found on July 2. On July 12 five specimens were taken in the 

 third instar, and on July 17 there were about twice as many of the 

 crickets in the fourth instar as in the third stage. On July 25 a few 

 of the insects were in the fifth instar, but the majority of them 

 were in the fourth stage. On August 5 most of the crickets were 

 in the fifth instar, but no adults had so far been observed. How- 

 ever, adults were found several days later. 



In 1912 no adults could be found on August 13 but a few of them 

 were detected on August 20. On August 23 adults and nymphs 

 of the fifth instar were present in about equal numbers, and by the 

 27th nearly all the nymphs had matured. The records for 1912 

 are probably several days later than normal as the summer was 

 unusually cool. 



