180 
[January, 
and the general resemblance to pinguis is striking, especially in the breadth of the 
fore-wings, while it actually bears no resemblance to the narrow winged adelphella. 
Ihe ferruginous ” basal space in the first is nothing like the brick-red blotch of the 
other, and the blackish fascia by which it is bounded is comparatively upright in the 
former, while it is curved and very oblique in the latter. 
I am, therefore, perfectly satisfied that hostilis, Stephens, is altogether distinct 
from adelphella of Zeller, and probably of F. v. R., and I think, then, there is no 
reason to suppose that it has ever been found in the United Kingdom. Dr. Wocke 
(who adopts hostilis as the prior name, and adelphella : as a synonym) gives Britain, 
Germany, and Southern and Eastern Russia as localities. The former refers to 
hostilis, the latter doubtless to adelphella. — C. G. Barrett.] 
ON PARTHENOGENESIS IN TEN THREDINIDJE. 
BY J. E. FLETCHER. 
During the past season I have, as opportunity offered, continued 
m y experiments on this subject. Thirteen virgin $ belonging to six 
species were tried, but the names of two of the species are not yet 
determined. They all have the power of depositing fertile ova. I 
notice that the virgin $ of the green Nemati deposit only a small 
number of eggs. So far, I have bred only one ? from any partheno- 
genetic brood of saw-fly larvae. 
A virgin $ of Ehyllotoma vagans deposited between sixty and 
seventy eggs, but as they were distributed on only three leaves, the 
larvae could not feed up. They ate all the parenchyma, and some 
bored down the footstalks, but then, of necessity, perished. One leaf 
contained nearly forty larvae. 
A specimen of Eriocampa ovata , from a this year’s larva, emerged 
on August 30th ; she deposited about thirty ova, from which the larvae 
hatched and fed, but not vigorously, till the food plant began to lose 
its vitality. Eventually, all perished for lack of food. 
A specimen of Hemichroa rufa , bred August 15th, deposited ova, 
from which I obtained about forty larvae ; but the stormy weather of 
autumn proved very unfavourable to larvae confined in a net, and when 
I decided to feed them indoors, they were reduced to about twenty, 
about a dozen of which have spun up. 
A small brood of larvae from a virgin ? of Nemcitus curtispina , bred 
August 17th, spun up by September 20tli, and three were bred by 
September 30th. 
Happy Land, Worcester: 
November, 1880. 
