98 
It was most abundant in Frederick and Carroll counties. Both adults 
and larve were everywhere present in the infested fields. At the time 
of my visit, June 30, to the infested areas of Frederick County, I found 
pupz of this species attached to leaves of peas, weeds. grass, and 
corn—in fact, most anything where the larve could secure a hold. 
Sometimes three or four were found upon a single leaf. The lice were 
on the decrease, and it was clearly seen that the lady beetles and other 
predaceous insects present would soon devour those remaining. 
Hippodamia convergens was also quite abundant, but not so conspicu- 
ous as the preceding species. The adults of Megilla maculata were 
found in nearly every field examined, and an occasional specimen of 
Coccinella sanguinea Was seen. 
The larve and eggs of Chrysopa oculata Say (adult determined by 
Mr. Nathan Banks) were found throughout the infested districts of the 
State, and it has been an important factor in the reduction of the lice. 
The soldier beetle, Podabrus rugosulus Lec. (determined by Mr. E. A. 
Schwarz). was also observed by me feeding upon the lice in my garden 
near the college. This completes the list of predaceous insects observed 
and bred. 
I was surprised, however, in not rearing any hymenopterous para- 
sites from these lice. None appeared in any of our breeding cages, and 
not one was observed in the field. The only parasite bred was that of 
Bassus letorius (2) Fab. (determined by Mr. W. H. Ashmead), which 
is considered parasitic upon the Syrphus larva. 
On the 18th of June I noticed a number of dead lice adhering to pea 
leaves in my garden, and inferred that death was due to a fungous dis- 
ease. The disease continued to increase until about the 25th of June, 
and finally disappeared. Sometimes ten to twelve dead lice, in all 
stages of development, were found upon a single pea leaf. Specimens 
were preserved, and will be reported later by my colleague, Dr. C. QO. 
Townsend, our State pathologist. 
A few lice were found on peas in my garden throughout the greater 
part of the month of July. Young were being produced Jaly 31 ina 
colony under observation in my study, while outside none could be 
found. 
As to the future, candidly, I am of the opinion that it will be many 
a day before we will see a repetition of such destruction to the pea 
crop by Nectarophora destructor. Nature has done her work well, and 
there is nothing left for the economic entomologist to do other than 
acknowledge his inability to cope with such mysterious forces, and keep 
plodding along in the darkness, hoping to get a ray of light here and 
there as he unravels some hidden truth. 
Does it not seem that old mother Nature is resenting the progress 
of civilization? She is calling a halt; but man, in his eagerness to 
gain a livelihood, is forging ahead blindly, apparently not heeding 
these warnings that he is going too fast. 
