AND HABITS OF DIAXENES DENDROBII, GAHAN. 9 
The following Table shows some of the results as regards 
variation in length of the life cycle -— 
Time during which Beetles Time of I f 
Plant. had opportunity to lay ge B nae - 
Eggs. Ww brood. 
Coelogyne cristata. June 1o—July 27, 1897. October 11, 1897. 
October 18, 1897. 
Beginning of Nov. 
Coelogyne flaccida, July 27—Aug. 9, 1897. April 7, 1898. 
Odontoglossum cit- July 27—Aug. 24, 1897. April 24, 1898. 
YOSMUM. May 2, 1898. 
It may be interesting to note how long my six imagines 
lived. 
Issuing as imagines between March 2nd and March 2oth, 
1897— 
The 1st died on April 8th, 1897. 
“2nd : May 28th, - 
yo ord é July 5th, fe 
yw 4th ‘a October ar “ 
” 5th ” ) 
6th Nok: 18th, | g 
Although Dzaxenes dendrobii is called the “ dendrobe-orchid 
beetle,” I am sorry to add that it does not content itself with 
infesting the Dendrobium nobile from Burmah. I have not 
found any orchid with marked pseudo-bulbs refused as food. In 
the following orchids my six insects bred, the feeding larve 
quite ruining the plants :— 
Lelia anceps. Coelogyne flaccida. 
Coelogyne cristata. Odonioglossum citrosmum. 
The orchid-house where I obtained my original material was 
quite ruined by the insect, and I took young or old larvae 
from the following orchids :— 
Dendrobium Farmerit. Lelia anceps (several 
” Griffithianum. varieties). 
” thyrsiflorum. Cattleya Mosste. 
Triane. 
ee Sormosum. ” 
