22 NEW YORK STATE MUSEUM 
under surface. Breeding evidently continues from some time in 
March 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. By July 28th winged fe- 
males had entirely disappeared 
in our breeding cages, though 
young were still numerous on 
Fic. 9 Gladiol aphid, posterior exteemary Pe DUDS ;ulater wall disappedgase 
of young nymph, enlarged.” (Oneine)! . An‘muvestization about tue mmidle 
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 up 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 
