DARTMOOR NOTES—ZYGAENA TRIFOLII AND OTHER SPECIES. 29 
marked state, and 384% in a less marked state, of development towards 
the confluence of all the spots; this is certainly a large ratio. 
Unfortunately the colony of small specimens was in a very weak 
condition. Dr. Perkins made a couple of visits after our day together 
and he kindly sent me the specimens he captured, but altogether we 
only took ten between us. Of these, three are decidedly small, two of 
them being the ab. orobi, Hb. (with the spots all separate) one typical 
example having the median spots confluent, whilst the other seven 
examples are larger, about the size perhaps of quite the smallest from 
the vigorous colony two hundred or more yards away. Of these seven 
one is typical, one has the median spots separate—orobi, one has the 
median spots confluent with a prolongation towards the basal ones, 
one has the median and outer spots confluent, whilst the other three 
have all the spots confluent. 380% of the total are therefore in the 
confluent, 40% are in a more or less progressive stage of confluence, 
whilst 30% are ab. orobi. The development of these two colonies, so 
near and yet so isolated, will be worth watching, only I fear, apart 
from Dr. Perkins, it is unlikely that this will be possible. As we 
wandered about the open hill-side, however, we chanced on another 
spot some 300 yards away from the large robust colony, where we took 
seven specimens, all large, two of which are orobi, four are typical with 
the median spots confluent, and one has the median and outer spots 
joined, the two median being confluent, by a short red dash, this 
small extension having evidently carried with it, the inheritance of its 
parent colony. 
I was well pleased with my day’s collecting with Dr. Perkins, and 
only wish we had been able to arrange another one, but the fates were 
not propitious, nor yet was the weather either. The problem, how- 
ever, made me search out-other colonies where I knew of its existence, 
or where I thought it ought to be found, but trifolit is very capricious, 
usually, I should say, it selected sheltered localities, but the one I have 
given an account of is well exposed, and must be frequently swept by 
storm and wind, without the least cover at all, and I therefore omitted 
no likely spot in my search during last July. The strongest colony 
was within a quarter of an hour of my holiday home, and it was cer- 
tainly an ideal spot, for it had a little stream running on either side, 
with plenty of shelter from bushes around, and screened from the pre- 
vailing winds by a rampart of forest trees perhaps a quarter of a mile 
away. There also I found Callimorpha dominula just emerging and in 
beautiful condition. I watched this colony for several weeks and took 
eighty specimens at random, making no selection, the numbers were 
amply sufficient for me to take this number without harm, and it is 
interesting to note that the colony had two extensions, one separated 
by a thoroughly dry area of perhaps half an acre, the other separated 
only by a thick dense hedge below and a close row of trees above, a 
barrier such as Devonshire loves. Out of the eighty specimens fifty 
are ab. orobi, three being smallish, not as small as the smallest of Dr. 
Perkins’ small colony, but smaller than the larger ones therefrom, the 
rest are average or large sized insects. There are twenty-seven typical 
specimens with the median spots confluent, of which eleven are but 
average in size, two specimens have all the spots confluent, one of them 
_being quite a small insect, whilst one has the median spots confluent, 
but it shows distinct traces of a sixth spot below the outer or fifth spot, 
