22 NEW YORK STATE MUSEUM 



under surface. Breeding evidently continues from some time in 

 Marcli until into July, with the production of numerous winged 

 individuals the latter part of July, at least in the case of 



bulbs submitted for examination, 

 though winged females un- 

 doubtedly occur earlier in the 

 season under warehouse condi- 

 tions. 15y July 28th winged fe- 

 males had entirely disappeared 

 in our breeding cages, tliough 

 young were still numerous on 

 Fio. 9 Gladioli aphid, posjerior otremiiy the bulbs ; later, all disappeared. 



of young nym.h. cnlar^^ed. (Oriu ,al) j^^ investigation aljOUt the middle 



of August resulted in finding no living aphids in the storage ware- 

 house or upon the plants in the field. It is stated that when dig- 

 ging in October a few plant lice may be found upon the bulbs. 

 These evidently remain in a dormant condition till the house 

 warms uj) in the spring as described above. 



Remedies. Fumigation with sulfur has been found ineffective 

 in controlling this species. It is more than probable that judicious 

 fumigation with hydrocyanic acid gas would be entirely successful 

 in controlling this pest. This might be accomplished by treating 

 the entire house or by arranging for the fumigation of badly in- 

 fested trays whenever necessary. The bulbs would probably not 

 be injured by any strength of gas which would be harmless to 

 ordinary growing plants, and it is probable that more gas could 

 be used with safety. This point can be determined only by actual 

 tests made preferably under warehouse conditions. 



Green cockroach 



Panchlora hyalina Saus. 



Two specimens of this Central American form, kindly deter- 

 mined through the courtesy of Dr L. O. Howard, were brought to 

 the office in March, each taken from a different section of 

 Albany, N. Y. The occurrence of a single specimen would have 

 little significance, as it might easily have been brought to the city 

 upon fruit boats, but the finding of two in different sections is not 

 so readily explained, particularly as we find records of this species 

 having been taken in other parts of the country. The earliest 

 record is that of a specimen being captured in a store in Boston 



