134 THE CANADIAN ENTOMOLOGIST. 



During oviposition, which requires 14 minutes for the deposition 



of a single egg, the female holds the cauda 

 perpendicular to the body. 



This interesting species was first re- 

 ceived from Mr. T. H. Parks, of this 

 Bureau, who found it quite common on 



Fig. 17.— M. tycoon*::, ° atS ' fil " St at S h° snone > Idaho, July 18, 



eg- 1912, and later at Blackfoot and Idaho 



Falls, Idaho, August 7, 1912. The same species was received from 

 Mr. E. J. Vosler, who collected it on oats at Salt Lake City, Utah. 

 Later in the year (October 8) the writer found the pupae of vivi- 

 parous females, as well as wingless viviparous females, which were 

 giving birth to the beautiful and conspicuous pinkish males, in 

 abundance on volunteen oats near an elevator at New Richmond, 

 "Ind. Specimens collected at Bozeman, Mont., in August of 1911 

 and 1912 on wheat, tomato, and celery were received from Prof. 

 R. A. Cooley and Mr. H. F. Dietz. Mr. Dietz informs me that 

 they also found the pinkish males on wheat at the same time, 

 although it was not known then that they and the pale yellow 

 forms on the same plant were specifically identical. 



In rearing cages at La Fayette, Ind., pink and yellow young 

 were obtained from wingless viviparous females. The former 

 became winged males, while the latter became winged viviparous 

 females, which in turn gave birth to oviparous females. The winged 

 males were quite restless in the cages containing wheat plants, as 

 were also the sexuparae, and it was only rarely that the latter could 

 be induced to give birth to an oviparous female on the wheat 

 plants, although most of those born there did feed and mature on 

 the wheat. Mr. Dietz states that in August, at the time his col- 

 lections were made, the winged forms were apparently migrating 

 to some unknown host. The same was true at New Richmond, 

 Ind., where the species was found in abundance on oats. Thus it 

 seems quite probable that the males and the winged viviparous 

 females (sexuparae) migrate to some unknown host in the fall of 

 the year, where the oviparous females are born and the winter eggs 

 deposited. 



Besides the plants enumerated above, we have reared this 

 species through several generations in the insectary on rye. 



(To be continued.) 



