78 
Psyche 
[June 
posterior dorsal surface. In brevicornis the tubercles arise 
from an intermediate position well above the axis. The 
serpentine pattern of respiratory pores on each spiracular 
plate is raised in ochracea and depleta, and is divided into 
thi’ee groups which are only vaguely indicated in some 
specimens of brevicornis. These groups in depleta are 
separated by much deeper grooves than in ochracea. The 
stigmatic scar is fairly prominent and the anus is remote 
from the tubercles in all three species. 
All puparia of brevicornis were formed in the laboratory 
essentially under normal seasonal temperatures. Two were 
obtained on 21 Aug., 1951, and ten more between 5 and 12 
Aug., 1952. Each year the puparia were kept at about 23° C 
foi- a little over two months, held at 8° for two more months, 
then returned to 23°. Of the 1951 puparia, one female 
emerged on 10 March, 1952; the other, also a female, 
succumbed to mold shortly before emergence. Of the 1952 
puparia, two males emerged after 11 days, and one male 
and one female emerged after 12 days, all before being 
placed in the cold room. The remaining six succumbed to 
mold and anthomyiid larvae in the insectary after cold 
treatment. Three of these contained fully formed flies, 
at least one of which was a female. Townsend (1936) cited 
a case of E. ochracea (Bigot) adults emerging in October, 
12 days after the puparia were collected in Dallas, Texas. 
According to Wolcott (1951) the pupal stage of ''E. australis 
(Tns.)” in Brazil lasts for ten days. 
From these records it is evident that a diapause induced 
by winter cold is not necessary for adult development. On 
Cape Cod, adults of both N eoconocephalus robustus and 
erisiger have been taken at least until early October, while 
adults of several other likely orthopteran hosts, such as the 
katydid, Amblycorypha oblojigifolia caidnata R. & H., and 
the common cricket, Acheta assimilis F., live beyond mid- 
November in many seasons. In the vicinity of Dallas, the 
closely related N. triops (L.) has been collected in mid- 
December (Rehn and Hebard, 1944) , and there are certainly 
many other possible hosts available beyond this date. With 
the probable capacity for a four to flve week life cycle as 
far north as Cape Cod, this parasite could well produce 
