204 Journal New York Entomological Society. [Voi. v. 
through the walls thus left, for the ejectment of the excreta. This ex¬ 
crement is shown at the right of Fig. i, also enlarged, and falls down 
on the outside in more or less broken and detached masses. The larva 
is, when nearly full grown, certainly less than an inch in length, and 
the amount of these ejectments were so astonishing that I determined to 
get some definite idea of the exact amount. We had at the same time 
two larvse under observation in the Insectary, one working in apple, 
the other in Witch Hazel, Hamamelis virginiana , and the castings of 
each were carefully saved during a period of twenty-four hours. In 
both cases the weight, 0.05 gram, was the same; and placed end to 
end, the detached pieces measured twenty-four and three-eighths inches 
in the one case, the other being too much broken to measure correctly, 
but probably did not differ materially from the first. This is giving an 
amount of evacuation for each hour from 11.00 a. m. to 11.00 a. m., 
the period of time covered by the test, amounting to considerably more 
in length per hour than the length of the larva itself. 
Cyllene picta Drury, has come to have a fondness for Osage orange, 
Maclura aurantiaca , hardly second to that for the Hickory. From a 
section of Osage orange fence post, one and one-half feet in length and 
four inches in diameter, placed in the insectary, there emerged between 
February 4th and April 14th, twenty-seven individual adults, the 
greatest number to appear in a single day being four, on February 24th. 
The beetle is shown in Fig. 3, Plate X, while the closely allied species, 
C. robinitz Forst, which breeds in Robinia pseudacacia L., is shown in 
Fig. 4. 
To our knowledge of Cryptorhyndius lapathi Gyll., Plate X, Fig. 
6, I have little to add, beyond what was given in Journal New York 
Entomological Society, Vol. V, p. 30. My specimens survived for a 
time, the last one having died the latter part of November. There was 
no indication of oviposition, and probably this does not take place until 
spring, the insect developing to the adult, largely at least, by September. 
The adults kept, fed daily by puncturing the bark of willow with which 
they were provided, gouging out the cambium layer. They simply 
make a hole the size of the beak, and then by circling about excavate a 
circular cavity under the outer bark. In Europe the species attacks 
Salix cinerea, S. alba , Populus, Betula , Alnus , and Rumex hydro- 
lapathum , from which last it probably derived its specific name. 
EXPLANATION OF PLATE X. 
Fig. 1. Adult, larva, and excreta of the latter, of Oberea bimaculata Oliv. 
Fig. 2. Section of twig burrowed out by O, bimaculata , showing holes in the walls 
for ejectment of the excreta of the larva. 
