978 General Notes. [September, 
INJURY DONE BY COLASPIS TRISTIS.—This common beetle is, like 
its congener, C. brunnea, an almost universal feeder, and it is sur- 
shoots of the twigs. The tips of the twigs thus injured dry up 
and die. One of the peach trees I examined was full of such 
dead tips, there being hardly any healthy ones left —E, A. Schwars, — 
Washington, D. C., Fune 11, 1883. 
from esculana, and it is withal a grayer species with the pale ati oo 
dark shades more highly and abruptly contrasted. In an artivie — 
(Psyche 111, p. 367, issued Dec. 16, 1882), he states that Prof : 
more of a blossom and leaf feeder than a stem-borer. The Br = 
ZOOLOGY. w 
New Opsservations on Hypra.—W. Marshall canim aa : 
stating his belief that the green color of Hydra viridis af nis 
to a symbiotic process, but is a property of the polyp, ane hae 
he agrees with Professor Ray Lankester; of this. ye 4 
appear to be several geographical races, as the forms men at deat 
by Baker, Trembly, Rösel, Pallas and Schaffer differ a gre ; 
in size and in the proportionate length of the arms. 
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