132 PSYCHE [December 
III. On September 13th, 1908, 8 female parasites were confined separately 
in small gelatine capsules, each with a single healthy puparium; of Phormia regina 
(Meigen); apparent oviposition was observed in each case. As a result, on October 
Ist, 1908, from one of the host puparia, there appeared 2 males and 8 females of the 
parasite. Other emergences did not occur. ‘The parasite attacks Phormia regina 
in confinement. 
IV. OnSeptember 27th, 1908, 12 virgin females of brevicornis, reared separately 
from puparia of Phormia regina and in no instance accessible to males, were con- 
fined separately, each in a small gelatine capsule with a single known healthy pupa- 
rium of the Phormia; on September 29th at 11:30 A. M., in three cases females were 
observed ovipositing; on October 15th, 1908, the progeny of two of the virgin females 
emerged as follows —17 males (Accession No. 40260, parent and 40261, male prog- 
eny) and 15 males (Accession No. 40262 parent and 40263, male progeny). Other 
emergences did not occur, but in three instances the larvae of the parasites were 
found in the host puparia. all dying, however. Hence, this parasite is parthenogenetic. 
The foregoing experiments unfortunately could not be extended and they merely 
indicate parthenogenesis (unverified) and the readiness with which this parasite 
attacks its various hosts in confinement. 
(To be continued.) 
THe REDISCOVERY OF GLUTOPS SINGULARIS BurRGESS.— This interesting fly 
was described by Edward Burgess in the Proceedings of the Boston Society of Nat- 
ural History, Vol. XIX, p. 322, pl. 1, figs. 2, a, b, c, d, 1878. It was collected by Dr. 
George Dimmock at Springfield, Mass., about 1872 near the United States armory, 
a section of the city now entirely built over, as are the surroundings for a long dis- 
tance beyond; it is therefore doubtful if it will again be found near the type locality. 
The Burgess collection was obtained by Dr. C. V. Riley and the type of this species 
is now in the U.S. National Museum. 
On April 18, 1909, Mr. William Reiff captured three males of this long lost 
species, near Purgatory Swamp, Norwood, Mass. Through the kindness of Professor 
William M. Wheeler one of the specimens has been placed in the New England 
Collection of the Boston Society of Natural History, and another will be placed in 
the Museum of Comparative Zoology, Cambridge. Now, that the time of its appear- 
ance is known, it is to be hoped that the female will soon be obtained, and perhaps 
the life history of this peculiar fly discovered. 
C. W. JoHNsSoN. 
