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have similarly become scarce in the cane of the Experiment 

 Station oTOuncls, during the past summer. 



Perhaps this parasite is more or less generally distributed. 

 The writer has found it common where the grasshoppers were 

 abundant on Hilo grass and Canna indica up Makiki Valley, 

 al)out one mile from the Experiment Station grounds. 



On a trip to the sugar plantations of Maui, in October, this 

 parasite was found to be very rare, and the grasshopper exceed- 

 ingly abundant everywhere. In the examination of 300 grass- 

 hopper eggs, in a cane-field at Lahaina, only one parasitized egg 

 was found. From this 7 parasites issued. 



Mr. Terry found that the parasite vyas present at Koloa, Ka- 

 uai, April, 1905; and also reports that the grasshoppers are 

 decreasing in other places on that island. 



(4). Life History. 



The eggs of X. varipcnnc are 5 mm. long and nearly i mm. 

 in greatest diameter, blunt at one end and pointed at the other, 

 which is the one where the head of the embryo appears. They 

 are slightly testaceous in color at first, but become greenish as 

 the embryo approaches time of hatching. 



The eggs are laid in clusters of from 2 to 15, side by side, 

 obliquely inserted beneath the leaf-sheaths of cane leaves (PI. 

 XIV, fig. 11), also those of Canna indica, and probably other 

 plants. Their presence can often be noticed by a slight outward 

 bulging of the leaf-sheath. The eggs are inserted with the an- 

 terior end outermost. They hatch in about 5 weeks. In one case, 

 adults were placed in a breeding cage, March 28, and young 

 grasshoppers appeared on the 35th day. In another observa- 

 tion, eggs laid April 6th hatched May 14th — a period of 38 days. 

 Eggs gathered June 27th hatched through a period of 16 to 29 

 days, being in various stages of embryonic growth when gath- 

 ered. In hatching, the &gg splits on one side at the anterior 

 end, about ^ length, but not extending quite to the tip. 



The nymphs in all stages are green, with the dorsal, brown, 

 pale-edged stripe of the adult. (PI. XIV, fig. 2.) 



Those bred to maturity molted 6 times (one individual 7 

 times), counting the final change to maturitv. The molts were 

 at intervals of 6-2T. days as follows: 



First molt 6- 11 days. 



Second " 7-23 " 



Third " 9-12 " 



Fourtli 

 Fifth 



9 



Matured 20 



