1923] Occurence of Muscina pascuorum in North America 
3 
chusetts On November 10 Mr. M. T. Smulyan took a specimen 
at Melrose Highlands; on the 11th Mr. A. P. Morse captured a 
number at Ipswich; and on the 12th at Wellesley. On the 13th 
Mr. W. L. Maxcy reported it as abundant in his house at Still- 
water. On the 14th I caught the second male on a window in 
Brookline, and on the same date Mr. R. T. Webber reported it 
from Dover, and Mr. G. W. Barber from Arlington. On the 
15th Miss Margaret Hayden collected it at Ashland; on the 18th 
Mr. C. V. Blackburn obtained it at Stoneham; on the 19th Mr. 
L. W. Jenkins secured it at Putnamville. On the 30th Mr. S. 
N. F. Sanford caught a specimen at Fall River, and on Dec. 2 
Dr. G. M. Allen captured two at Cohasset. 
Correspondence, together with a note published in Science 
(November 24), has further added to our knowledge of its dis- 
tribution. Under date of November 14, Dr. W. E. Britton, of 
the Connecticut Agricultural Experiment Station, New Haven, 
writes: ‘‘We have noticed a number of large-sized flies around 
the windows and have killed some of them. We paid little 
attention to the species, but there are now some dead ones 
around the place and I will have some of them relaxed, pinned, 
and sent to you.” I received the flies, November 21 and they 
were all M. 'pascuorum. Dr. H. T. Fernald, of Amherst, Mass., 
writes, “Answering your letter of Nov. 17, I may say that we 
have noticed a species of Muscina on our windows this fall and 
took specimens first on Oct. 12, though they were present 
considerably before that date. We are referring it to Muscina 
pabulorum Meig. I should be very glad to know whether we are 
on the right track.” Under date of November 28, Dr. Fernald 
again writes: “Many thanks for your letter of Nov.. 27. It has 
been reasonably abundant here, and was certainly present for at 
least a week or ten days before we thought of taking and actually 
dating a specimen. I have not heard of it from any other part of 
the. state mainly because nobody appears to pay any attention 
to flies which show up on house windows.” 
In a letter from Dr. O. A. Johannsen. of Ithaca, N. Y., 
dated November 24, he says: — 
