1909} EASTON — COLEOPTERA 39 
It has long been known that tachinid flies parasitise adult beetles. It appears 
that not all of them have the same mode of infesting their host. Thus on June 14 I 
took a female Lina scripta which had four eggs of a tachinid fastened upon her 
elytra. This beetle was kept alive in order to ascertain if the parasitism was suc- 
cessful. Shortly afterward this beetle laid a large number of eggs and in the course 
of another week died. No tachinids resulted although the dead beetle was kept in 
the breeding jar for several weeks. 
A number of records have been made of tachinid rearings from adult Chry- 
somelidae, as well as from coleoptera of other families. It is doubtful, however, that 
any statements can be found that indicate the mode of parasitization or the habits 
of the tachinids in question. It is to be hoped that this subject, in which Townsend 
has recently opened such an interesting perspective, will attract other students. 
A LIST OF COLEOPTERA COLLECTED WITHIN TEN MILES OF 
FALL RIVER, MASSACHUSETTS. 
BY NORMAN S. EASTON, FALL RIVER, MASS. 
One of the aims of the Fall River Society of Natural History is to make a list 
of the fauna and flora found within ten miles of the City Hall. All the beetles in the 
following list were taken within this ten mile radius, and with a few exceptions, are 
represented in the collection of the society. Fully ninety percent have been taken 
during the last five years by a single individual. At least three hundred more species 
may be confidently expected to occur in the region. 
The region, coming as it does, within a debatable portion of the transitional 
zone, is a very interesting one. The varied physical features make it a delightful 
and productive collecting ground. 
From North to South, directly through the center of the region, runs the escarp- 
ment formed on account of the contact between hard granitic rocks and the soft 
sediments of the Rhode Island coal measures. A mile or more to the eastward of 
this contact, upon the upland, lies a chain of fresh water lakes, extending nearly the 
length of the area. To the eastward of the lakes are tracts of forest growth, princi- 
pally of oak and pine, and extended areas of dense cedar swamps. 
To the westward, of the escarpment lies the estuarian region of the Narragansett 
basin, with its miles of varied shore lines and acres of cleared lands. 
