1953] 
Nutting — Biology of Euphasiopteryx 
79 
at least two generations a year on adult Orthoptera alone. 
It can and probably does pass the winter in the puparium, 
although nothing is known of the mating habits and survival 
capabilities of the adult flies. 
In an effort to fill in the range and determine the host 
preferenda of these little-known flies, 15 specimens of N. r. 
robustus in the Museum of Comparative Zoology, from 
Cape Cod to Long Island, were examined for the presence 
of larval breathing holes. Similarly examined were 176 
specimens, representing nine other species of Neocono- 
cephalus from Massachusetts to Minnesota, Texas, and 
Florida, together with 26 Florida specimens of the related 
genera Belocephalus, Pyrgocorypha, and Homorocoryphus. 
In addition, large numbers of Orthoptera have been collected 
in East Brewster for anatomical studies over the past five 
years, and lately re-examined. These have included such 
likely hosts as N. ensiger (Harris) ; the conocephaline, 
Orchelimum vulgare Harris; the phaneropterine, Amhly- 
corypha oblongifolia carinata R. & H. ; and the common 
cricket, Acheta assimilis F. All of these examinations proved 
negative except for a single male of N. ensiger, collected 
by Richard Dow in Needham, Mass., 7 Aug., 1936, which 
bore the characteristic larval breathing hole in the left 
pleural membrane of the sixth abdominal segment. After 
softening the specimen a half-grown larva, with the first 
instar exuviae adhering to the funnel, was dissected out. 
On comparison with equivalent material under study, 
there is little doubt that E. brevicornis also parasitizes N. 
ensiger, 
C. W. Sabrosky has checked the ranges of the two 
subspecies of E. brevicornis against those of the two 
subspecies of this particular host, N. r. robustus and r. 
crepitans, and informs me that the ranges show no signifi- 
cant coincidence. Therefore, until further evidence is 
available, it is assumed that the two subspecies of brevi- 
cornis must utilize additional hosts, at least in other areas 
of the range, but one or more of the ten other species of 
Neocono cephalus are probably favored. The question as 
to whether or not only adult Orthoptera are parasitized 
remains unanswered. Should the adults of a certain species 
