80 
Psyche 
[June 
be the only host in a particular area, either the pupal stage 
or the adult life must be rather extended; on the other 
hand, if nymphal stages are also attacked, the host attrition 
must be considerable in favorable seasons. 
Since all evidence has shown the genus to have a pre- 
dilection for nocturnal orthopteran hosts, it is not surprising 
that, in the laboratory at least, the adult flies are also 
nocturnal. Wolcott (1951) has reported that “E, australis” 
adults hid in the darkest part of their cage during the day, 
but were unusually active at night. At present I can only 
confirm his observations and add that, during six years of 
occasional general collecting in the East Brewster area, I 
have never seen an adult fly. Many specimens seen by Mr. 
Sabrosky were collected at night, a further hint, but not 
proof, of nocturnal habits. Although much of the evidence 
cited above on range and host preference is either negative 
or purely circumstantial and speculative, it does explain 
the rarity and obscurity of these flies as well as their 
extremely local occurrence. 
I extend my appreciation to C. W. Sabrosky of the Bureau 
of Entomology and Plant Quarantine for furnishing some 
of the pertinent references included, and especially for 
identification of the fly and description of the new sub- 
species, without which this information would be of little 
value. He made available for comparison the puparia of E. 
ochracea and australis, details of which are shown in text 
fig. 1. I also wish to thank Prof. H. J. Reinhard, of the 
Agricultural and Mechanical College of Texas, for his part 
in assisting in the identification. 
Bibliography 
Baer, W. 
1920. Die Tachinen als Schmarotzer der schadlichen Insekten. 
Ihre Lebensweise, wirtschaftliche Bedeutung und systematische 
Kennzeichnung. Zeitschr. f. angew. Ent., 6: 185-246. 
Beard, R. L. 
1942. On the formation of the tracheal funnel in Anasa tristis DeG. 
induced by the parasite Trichopoda pennipes Fabr. Ann, Ent. 
Soc. Am., 35:68-72. 
Clausen, C. P. 
1940. Entomophagous Insects, pp. 430-484. New York: McGraw-Hill. 
